diff --git a/CHANGES.txt b/CHANGES.txt new file mode 100644 index 0000000000..6e8b0497c0 --- /dev/null +++ b/CHANGES.txt @@ -0,0 +1,8971 @@ +Hadoop Change Log + +Trunk (unreleased changes) + + INCOMPATIBLE CHANGES + + HADOOP-4895. Remove deprecated methods DFSClient.getHints(..) and + DFSClient.isDirectory(..). (szetszwo) + + HADOOP-4941. Remove deprecated FileSystem methods: getBlockSize(Path f), + getLength(Path f) and getReplication(Path src). (szetszwo) + + HADOOP-4648. Remove obsolete, deprecated InMemoryFileSystem and + ChecksumDistributedFileSystem. (cdouglas via szetszwo) + + HADOOP-4940. Remove a deprecated method FileSystem.delete(Path f). (Enis + Soztutar via szetszwo) + + HADOOP-4010. Change semantics for LineRecordReader to read an additional + line per split- rather than moving back one character in the stream- to + work with splittable compression codecs. (Abdul Qadeer via cdouglas) + + HADOOP-5094. Show hostname and separate live/dead datanodes in DFSAdmin + report. (Jakob Homan via szetszwo) + + HADOOP-4942. Remove deprecated FileSystem methods getName() and + getNamed(String name, Configuration conf). (Jakob Homan via szetszwo) + + HADOOP-5486. Removes the CLASSPATH string from the command line and instead + exports it in the environment. (Amareshwari Sriramadasu via ddas) + + HADOOP-2827. Remove deprecated NetUtils::getServerAddress. (cdouglas) + + HADOOP-5681. Change examples RandomWriter and RandomTextWriter to + use new mapreduce API. (Amareshwari Sriramadasu via sharad) + + HADOOP-5680. Change org.apache.hadoop.examples.SleepJob to use new + mapreduce api. (Amareshwari Sriramadasu via sharad) + + HADOOP-5699. Change org.apache.hadoop.examples.PiEstimator to use + new mapreduce api. (Amareshwari Sriramadasu via sharad) + + HADOOP-5720. Introduces new task types - JOB_SETUP, JOB_CLEANUP + and TASK_CLEANUP. Removes the isMap methods from TaskID/TaskAttemptID + classes. (ddas) + + HADOOP-5668. Change TotalOrderPartitioner to use new API. (Amareshwari + Sriramadasu via cdouglas) + + HADOOP-5738. Split "waiting_tasks" JobTracker metric into waiting maps and + waiting reduces. (Sreekanth Ramakrishnan via cdouglas) + + HADOOP-5679. Resolve findbugs warnings in core/streaming/pipes/examples. + (Jothi Padmanabhan via sharad) + + HADOOP-4359. Support for data access authorization checking on Datanodes. + (Kan Zhang via rangadi) + + NEW FEATURES + + HADOOP-4268. Change fsck to use ClientProtocol methods so that the + corresponding permission requirement for running the ClientProtocol + methods will be enforced. (szetszwo) + + HADOOP-3953. Implement sticky bit for directories in HDFS. (Jakob Homan + via szetszwo) + + HADOOP-4368. Implement df in FsShell to show the status of a FileSystem. + (Craig Macdonald via szetszwo) + + HADOOP-3741. Add a web ui to the SecondaryNameNode for showing its status. + (szetszwo) + + HADOOP-5018. Add pipelined writers to Chukwa. (Ari Rabkin via cdouglas) + + HADOOP-5052. Add an example computing exact digits of pi using the + Bailey-Borwein-Plouffe algorithm. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-4927. Adds a generic wrapper around outputformat to allow creation of + output on demand (Jothi Padmanabhan via ddas) + + HADOOP-5144. Add a new DFSAdmin command for changing the setting of restore + failed storage replicas in namenode. (Boris Shkolnik via szetszwo) + + HADOOP-5258. Add a new DFSAdmin command to print a tree of the rack and + datanode topology as seen by the namenode. (Jakob Homan via szetszwo) + + HADOOP-4756. A command line tool to access JMX properties on NameNode + and DataNode. (Boris Shkolnik via rangadi) + + HADOOP-4539. Introduce backup node and checkpoint node. (shv) + + HADOOP-5363. Add support for proxying connections to multiple clusters with + different versions to hdfsproxy. (Zhiyong Zhang via cdouglas) + + HADOOP-5528. Add a configurable hash partitioner operating on ranges of + BinaryComparable keys. (Klaas Bosteels via shv) + + HADOOP-5257. HDFS servers may start and stop external components through + a plugin interface. (Carlos Valiente via dhruba) + + HADOOP-5450. Add application-specific data types to streaming's typed bytes + interface. (Klaas Bosteels via omalley) + + HADOOP-5518. Add contrib/mrunit, a MapReduce unit test framework. + (Aaron Kimball via cutting) + + HADOOP-5469. Add /metrics servlet to daemons, providing metrics + over HTTP as either text or JSON. (Philip Zeyliger via cutting) + + HADOOP-5467. Introduce offline fsimage image viewer. (Jakob Homan via shv) + + HADOOP-5752. Add a new hdfs image processor, Delimited, to oiv. (Jakob + Homan via szetszwo) + + HADOOP-5266. Adds the capability to do mark/reset of the reduce values + iterator in the Context object API. (Jothi Padmanabhan via ddas) + + HADOOP-5745. Allow setting the default value of maxRunningJobs for all + pools. (dhruba via matei) + + HADOOP-5643. Adds a way to decommission TaskTrackers while the JobTracker + is running. (Amar Kamat via ddas) + + IMPROVEMENTS + + HADOOP-4565. Added CombineFileInputFormat to use data locality information + to create splits. (dhruba via zshao) + + HADOOP-4936. Improvements to TestSafeMode. (shv) + + HADOOP-4985. Remove unnecessary "throw IOException" declarations in + FSDirectory related methods. (szetszwo) + + HADOOP-5017. Change NameNode.namesystem declaration to private. (szetszwo) + + HADOOP-4794. Add branch information from the source version control into + the version information that is compiled into Hadoop. (cdouglas via + omalley) + + HADOOP-5070. Increment copyright year to 2009, remove assertions of ASF + copyright to licensed files. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-5037. Deprecate static FSNamesystem.getFSNamesystem(). (szetszwo) + + HADOOP-5088. Include releaseaudit target as part of developer test-patch + target. (Giridharan Kesavan via nigel) + + HADOOP-2721. Uses setsid when creating new tasks so that subprocesses of + this process will be within this new session (and this process will be + the process leader for all the subprocesses). Killing the process leader, + or the main Java task in Hadoop's case, kills the entire subtree of + processes. (Ravi Gummadi via ddas) + + HADOOP-5097. Remove static variable JspHelper.fsn, a static reference to + a non-singleton FSNamesystem object. (szetszwo) + + HADOOP-3327. Improves handling of READ_TIMEOUT during map output copying. + (Amareshwari Sriramadasu via ddas) + + HADOOP-5124. Choose datanodes randomly instead of starting from the first + datanode for providing fairness. (hairong via szetszwo) + + HADOOP-4930. Implement a Linux native executable that can be used to + launch tasks as users. (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5122. Fix format of fs.default.name value in libhdfs test conf. + (Craig Macdonald via tomwhite) + + HADOOP-5038. Direct daemon trace to debug log instead of stdout. (Jerome + Boulon via cdouglas) + + HADOOP-5101. Improve packaging by adding 'all-jars' target building core, + tools, and example jars. Let findbugs depend on this rather than the 'tar' + target. (Giridharan Kesavan via cdouglas) + + HADOOP-4868. Splits the hadoop script into three parts - bin/hadoop, + bin/mapred and bin/hdfs. (Sharad Agarwal via ddas) + + HADOOP-1722. Adds support for TypedBytes and RawBytes in Streaming. + (Klaas Bosteels via ddas) + + HADOOP-4220. Changes the JobTracker restart tests so that they take much + less time. (Amar Kamat via ddas) + + HADOOP-4885. Try to restore failed name-node storage directories at + checkpoint time. (Boris Shkolnik via shv) + + HADOOP-5209. Update year to 2009 for javadoc. (szetszwo) + + HADOOP-5279. Remove unnecessary targets from test-patch.sh. + (Giridharan Kesavan via nigel) + + HADOOP-5120. Remove the use of FSNamesystem.getFSNamesystem() from + UpgradeManagerNamenode and UpgradeObjectNamenode. (szetszwo) + + HADOOP-5222. Add offset to datanode clienttrace. (Lei Xu via cdouglas) + + HADOOP-5240. Skip re-building javadoc when it is already + up-to-date. (Aaron Kimball via cutting) + + HADOOP-5042. Add a cleanup stage to log rollover in Chukwa appender. + (Jerome Boulon via cdouglas) + + HADOOP-5264. Removes redundant configuration object from the TaskTracker. + (Sharad Agarwal via ddas) + + HADOOP-5232. Enable patch testing to occur on more than one host. + (Giri Kesavan via nigel) + + HADOOP-4546. Fix DF reporting for AIX. (Bill Habermaas via cdouglas) + + HADOOP-5023. Add Tomcat support to HdfsProxy. (Zhiyong Zhang via cdouglas) + + HADOOP-5317. Provide documentation for LazyOutput Feature. + (Jothi Padmanabhan via johan) + + HADOOP-5455. Document rpc metrics context to the extent dfs, mapred, and + jvm contexts are documented. (Philip Zeyliger via cdouglas) + + HADOOP-5358. Provide scripting functionality to the synthetic load + generator. (Jakob Homan via hairong) + + HADOOP-5442. Paginate jobhistory display and added some search + capabilities. (Amar Kamat via acmurthy) + + HADOOP-4842. Streaming now allows specifiying a command for the combiner. + (Amareshwari Sriramadasu via ddas) + + HADOOP-5196. avoiding unnecessary byte[] allocation in + SequenceFile.CompressedBytes and SequenceFile.UncompressedBytes. + (hong tang via mahadev) + + HADOOP-4655. New method FileSystem.newInstance() that always returns + a newly allocated FileSystem object. (dhruba) + + HADOOP-4788. Set Fair scheduler to assign both a map and a reduce on each + heartbeat by default. (matei) + + HADOOP-5491. In contrib/index, better control memory usage. + (Ning Li via cutting) + + HADOOP-5423. Include option of preserving file metadata in + SequenceFile::sort. (Michael Tamm via cdouglas) + + HADOOP-5331. Add support for KFS appends. (Sriram Rao via cdouglas) + + HADOOP-4365. Make Configuration::getProps protected in support of + meaningful subclassing. (Steve Loughran via cdouglas) + + HADOOP-2413. Remove the static variable FSNamesystem.fsNamesystemObject. + (Konstantin Shvachko via szetszwo) + + HADOOP-4584. Improve datanode block reports and associated file system + scan to avoid interefering with normal datanode operations. + (Suresh Srinivas via rangadi) + + HADOOP-5502. Documentation for backup and checkpoint nodes. + (Jakob Homan via shv) + + HADOOP-5485. Mask actions in the fair scheduler's servlet UI based on + value of webinterface.private.actions. + (Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-5581. HDFS should throw FileNotFoundException when while opening + a file that does not exist. (Brian Bockelman via rangadi) + + HADOOP-5509. PendingReplicationBlocks does not start monitor in the + constructor. (shv) + + HADOOP-5494. Modify sorted map output merger to lazily read values, + rather than buffering at least one record for each segment. (Devaraj Das + via cdouglas) + + HADOOP-5396. Provide ability to refresh queue ACLs in the JobTracker + without having to restart the daemon. + (Sreekanth Ramakrishnan and Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-4490. Provide ability to run tasks as job owners. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5697. Change org.apache.hadoop.examples.Grep to use new + mapreduce api. (Amareshwari Sriramadasu via sharad) + + HADOOP-5625. Add operation duration to clienttrace. (Lei Xu via cdouglas) + + HADOOP-5705. Improve TotalOrderPartitioner efficiency by updating the trie + construction. (Dick King via cdouglas) + + HADOOP-5589. Eliminate source limit of 64 for map-side joins imposed by + TupleWritable encoding. (Jingkei Ly via cdouglas) + + HADOOP-5734. Correct block placement policy description in HDFS + Design document. (Konstantin Boudnik via shv) + + HADOOP-5657. Validate data in TestReduceFetch to improve merge test + coverage. (cdouglas) + + HADOOP-5613. Change S3Exception to checked exception. + (Andrew Hitchcock via tomwhite) + + HADOOP-5717. Create public enum class for the Framework counters in + org.apache.hadoop.mapreduce. (Amareshwari Sriramadasu via sharad) + + HADOOP-5217. Split AllTestDriver for core, hdfs and mapred. (sharad) + + HADOOP-5364. Add certificate expiration warning to HsftpFileSystem and HDFS + proxy. (Zhiyong Zhang via cdouglas) + + HADOOP-5733. Add map/reduce slot capacity and blacklisted capacity to + JobTracker metrics. (Sreekanth Ramakrishnan via cdouglas) + + HADOOP-5596. Add EnumSetWritable. (He Yongqiang via szetszwo) + + HADOOP-5727. Simplify hashcode for ID types. (Shevek via cdouglas) + + HADOOP-5500. In DBOutputFormat, where field names are absent permit the + number of fields to be sufficient to construct the select query. (Enis + Soztutar via cdouglas) + + HADOOP-5081. Split TestCLI into HDFS, Mapred and Core tests. (sharad) + + HADOOP-5015. Separate block management code from FSNamesystem. (Suresh + Srinivas via szetszwo) + + HADOOP-5080. Add new test cases to TestMRCLI and TestHDFSCLI + (V.Karthikeyan via nigel) + + HADOOP-4372. Improves the way history filenames are obtained and manipulated. + (Amar Kamat via ddas) + + HADOOP-5135. Splits the tests into different directories based on the + package. Four new test targets have been defined - run-test-core, + run-test-mapred, run-test-hdfs and run-test-hdfs-with-mr. + (Sharad Agarwal via ddas) + + HADOOP-5771. Implements unit tests for LinuxTaskController. + (Sreekanth Ramakrishnan and Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-5419. Provide a facility to query the Queue ACLs for the + current user. + (Rahul Kumar Singh via yhemanth) + + HADOOP-5780. Improve per block message prited by "-metaSave" in HDFS. + (Raghu Angadi) + + HADOOP-5792. To resolve jsp-2.1 jars through ivy (Giridharan Kesavan) + + HADOOP-5823. Added a new class DeprecatedUTF8 to help with removing + UTF8 related javac warnings. These warnings are removed in + FSEditLog.java as a use case. (Raghu Angadi) + + HADOOP-5824. Deprecate DataTransferProtocol.OP_READ_METADATA and remove + the corresponding unused codes. (Kan Zhang via szetszwo) + + HADOOP-5721. Factor out EditLogFileInputStream and EditLogFileOutputStream + into independent classes. (Luca Telloli & Flavio Junqueira via shv) + + HADOOP-5838. Fix a few javac warnings in HDFS. (Raghu Angadi) + + HADOOP-5854. Fix a few "Inconsistent Synchronization" warnings in HDFS. + (Raghu Angadi) + + HADOOP-5369. Small tweaks to reduce MapFile index size. (Ben Maurer + via sharad) + + HADOOP-5858. Eliminate UTF8 and fix warnings in test/hdfs-with-mr package. + (shv) + + OPTIMIZATIONS + + HADOOP-5595. NameNode does not need to run a replicator to choose a + random DataNode. (hairong) + + HADOOP-5603. Improve NameNode's block placement performance. (hairong) + + HADOOP-5638. More improvement on block placement performance. (hairong) + + BUG FIXES + + HADOOP-5379. CBZip2InputStream to throw IOException on data crc error. + (Rodrigo Schmidt via zshao) + + HADOOP-5326. Fixes CBZip2OutputStream data corruption problem. + (Rodrigo Schmidt via zshao) + + HADOOP-4963. Fixes a logging to do with getting the location of + map output file. (Amareshwari Sriramadasu via ddas) + + HADOOP-2337. Trash should close FileSystem on exit and should not start + emtying thread if disabled. (shv) + + HADOOP-5072. Fix failure in TestCodec because testSequenceFileGzipCodec + won't pass without native gzip codec. (Zheng Shao via dhruba) + + HADOOP-5050. TestDFSShell.testFilePermissions should not assume umask + setting. (Jakob Homan via szetszwo) + + HADOOP-4975. Set classloader for nested mapred.join configs. (Jingkei Ly + via cdouglas) + + HADOOP-5078. Remove invalid AMI kernel in EC2 scripts. (tomwhite) + + HADOOP-5045. FileSystem.isDirectory() should not be deprecated. (Suresh + Srinivas via szetszwo) + + HADOOP-4960. Use datasource time, rather than system time, during metrics + demux. (Eric Yang via cdouglas) + + HADOOP-5032. Export conf dir set in config script. (Eric Yang via cdouglas) + + HADOOP-5176. Fix a typo in TestDFSIO. (Ravi Phulari via szetszwo) + + HADOOP-4859. Distinguish daily rolling output dir by adding a timestamp. + (Jerome Boulon via cdouglas) + + HADOOP-4959. Correct system metric collection from top on Redhat 5.1. (Eric + Yang via cdouglas) + + HADOOP-5039. Fix log rolling regex to process only the relevant + subdirectories. (Jerome Boulon via cdouglas) + + HADOOP-5095. Update Chukwa watchdog to accept config parameter. (Jerome + Boulon via cdouglas) + + HADOOP-5147. Correct reference to agent list in Chukwa bin scripts. (Ari + Rabkin via cdouglas) + + HADOOP-5148. Fix logic disabling watchdog timer in Chukwa daemon scripts. + (Ari Rabkin via cdouglas) + + HADOOP-5100. Append, rather than truncate, when creating log4j metrics in + Chukwa. (Jerome Boulon via cdouglas) + + HADOOP-5204. Fix broken trunk compilation on Hudson by letting + task-controller be an independent target in build.xml. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5212. Fix the path translation problem introduced by HADOOP-4868 + running on cygwin. (Sharad Agarwal via omalley) + + HADOOP-5226. Add license headers to html and jsp files. (szetszwo) + + HADOOP-5172. Disable misbehaving Chukwa unit test until it can be fixed. + (Jerome Boulon via nigel) + + HADOOP-4933. Fixes a ConcurrentModificationException problem that shows up + when the history viewer is accessed concurrently. + (Amar Kamat via ddas) + + HADOOP-5253. Remove duplicate call to cn-docs target. + (Giri Kesavan via nigel) + + HADOOP-5251. Fix classpath for contrib unit tests to include clover jar. + (nigel) + + HADOOP-5206. Synchronize "unprotected*" methods of FSDirectory on the root. + (Jakob Homan via shv) + + HADOOP-5292. Fix NPE in KFS::getBlockLocations. (Sriram Rao via lohit) + + HADOOP-5219. Adds a new property io.seqfile.local.dir for use by SequenceFile, + which earlier used mapred.local.dir. (Sharad Agarwal via ddas) + + HADOOP-5300. Fix ant javadoc-dev target and the typo in the class name + NameNodeActivtyMBean. (szetszwo) + + HADOOP-5218. libhdfs unit test failed because it was unable to + start namenode/datanode. Fixed. (dhruba) + + HADOOP-5273. Add license header to TestJobInProgress.java. (Jakob Homan + via szetszwo) + + HADOOP-5229. Remove duplicate version variables in build files + (Stefan Groschupf via johan) + + HADOOP-5383. Avoid building an unused string in NameNode's + verifyReplication(). (Raghu Angadi) + + HADOOP-5347. Create a job output directory for the bbp examples. (szetszwo) + + HADOOP-5341. Make hadoop-daemon scripts backwards compatible with the + changes in HADOOP-4868. (Sharad Agarwal via yhemanth) + + HADOOP-5456. Fix javadoc links to ClientProtocol#restoreFailedStorage(..). + (Boris Shkolnik via szetszwo) + + HADOOP-5458. Remove leftover Chukwa entries from build, etc. (cdouglas) + + HADOOP-5386. Modify hdfsproxy unit test to start on a random port, + implement clover instrumentation. (Zhiyong Zhang via cdouglas) + + HADOOP-5511. Add Apache License to EditLogBackupOutputStream. (shv) + + HADOOP-5507. Fix JMXGet javadoc warnings. (Boris Shkolnik via szetszwo) + + HADOOP-5210. Solves a problem in the progress report of the reduce task. + (Ravi Gummadi via ddas) + + HADOOP-5191. Accessing HDFS with any ip or hostname should work as long + as it points to the interface NameNode is listening on. (Raghu Angadi) + + HADOOP-5561. Add javadoc.maxmemory parameter to build, preventing OOM + exceptions from javadoc-dev. (Jakob Homan via cdouglas) + + HADOOP-5149. Modify HistoryViewer to ignore unfamiliar files in the log + directory. (Hong Tang via cdouglas) + + HADOOP-5477. Fix rare failure in TestCLI for hosts returning variations of + 'localhost'. (Jakob Homan via cdouglas) + + HADOOP-5194. Disables setsid for tasks run on cygwin. + (Ravi Gummadi via ddas) + + HADOOP-5322. Fix misleading/outdated comments in JobInProgress. + (Amareshwari Sriramadasu via cdouglas) + + HADOOP-5198. Fixes a problem to do with the task PID file being absent and + the JvmManager trying to look for it. (Amareshwari Sriramadasu via ddas) + + HADOOP-5464. DFSClient did not treat write timeout of 0 properly. + (Raghu Angadi) + + HADOOP-4045. Fix processing of IO errors in EditsLog. + (Boris Shkolnik via shv) + + HADOOP-5462. Fixed a double free bug in the task-controller + executable. (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5652. Fix a bug where in-memory segments are incorrectly retained in + memory. (cdouglas) + + HADOOP-5533. Recovery duration shown on the jobtracker webpage is + inaccurate. (Amar Kamat via sharad) + + HADOOP-5647. Fix TestJobHistory to not depend on /tmp. (Ravi Gummadi + via sharad) + + HADOOP-5661. Fixes some findbugs warnings in o.a.h.mapred* packages and + supresses a bunch of them. (Jothi Padmanabhan via ddas) + + HADOOP-5704. Fix compilation problems in TestFairScheduler and + TestCapacityScheduler. (Chris Douglas via szetszwo) + + HADOOP-5650. Fix safemode messages in the Namenode log. (Suresh Srinivas + via szetszwo) + + HADOOP-5488. Removes the pidfile management for the Task JVM from the + framework and instead passes the PID back and forth between the + TaskTracker and the Task processes. (Ravi Gummadi via ddas) + + HADOOP-5658. Fix Eclipse templates. (Philip Zeyliger via shv) + + HADOOP-5709. Remove redundant synchronization added in HADOOP-5661. (Jothi + Padmanabhan via cdouglas) + + HADOOP-5715. Add conf/mapred-queue-acls.xml to the ignore lists. + (szetszwo) + + HADOOP-5612. Some c++ scripts are not chmodded before ant execution. + (Todd Lipcon via tomwhite) + + HADOOP-5611. Fix C++ libraries to build on Debian Lenny. (Todd Lipcon + via tomwhite) + + HADOOP-5592. Fix typo in Streaming doc in reference to GzipCodec. + (Corinne Chandel via tomwhite) + + HADOOP-5656. Counter for S3N Read Bytes does not work. (Ian Nowland + via tomwhite) + + HADOOP-5406. Fix JNI binding for ZlibCompressor::setDictionary. (Lars + Francke via cdouglas) + + HADOOP-3426. Fix/provide handling when DNS lookup fails on the loopback + address. Also cache the result of the lookup. (Steve Loughran via cdouglas) + + HADOOP-5476. Close the underlying InputStream in SequenceFile::Reader when + the constructor throws an exception. (Michael Tamm via cdouglas) + + HADOOP-5675. Do not launch a job if DistCp has no work to do. (Tsz Wo + (Nicholas), SZE via cdouglas) + + HADOOP-5737. Fixes a problem in the way the JobTracker used to talk to + other daemons like the NameNode to get the job's files. Also adds APIs + in the JobTracker to get the FileSystem objects as per the JobTracker's + configuration. (Amar Kamat via ddas) + + HADOOP-5648. Not able to generate gridmix.jar on the already compiled version of hadoop. + (gkesavan) + + HADOOP-5808. Fix import never used javac warnings in hdfs. (szetszwo) + + HADOOP-5203. TT's version build is too restrictive. (Rick Cox via sharad) + + HADOOP-5818. Revert the renaming from FSNamesystem.checkSuperuserPrivilege + to checkAccess by HADOOP-5643. (Amar Kamat via szetszwo) + + HADOOP-5820. Fix findbugs warnings for http related codes in hdfs. + (szetszwo) + + HADOOP-5822. Fix javac warnings in several dfs tests related to unncessary + casts. (Jakob Homan via szetszwo) + + HADOOP-5842. Fix a few javac warnings under packages fs and util. + (Hairong Kuang via szetszwo) + + HADOOP-5845. Build successful despite test failure on test-core target. + (sharad) + + HADOOP-5314. Prevent unnecessary saving of the file system image during + name-node startup. (Jakob Homan via shv) + + HADOOP-5855. Fix javac warnings for DisallowedDatanodeException and + UnsupportedActionException. (szetszwo) + + HADOOP-5582. Fixes a problem in Hadoop Vaidya to do with reading + counters from job history files. (Suhas Gogate via ddas) + + HADOOP-5829. Fix javac warnings found in ReplicationTargetChooser, + FSImage, Checkpointer, SecondaryNameNode and a few other hdfs classes. + (Suresh Srinivas via szetszwo) + + HADOOP-5835. Fix findbugs warnings found in Block, DataNode, NameNode and + a few other hdfs classes. (Suresh Srinivas via szetszwo) + +Release 0.20.1 - Unreleased + + INCOMPATIBLE CHANGES + + HADOOP-5726. Remove pre-emption from capacity scheduler code base. + (Rahul Kumar Singh via yhemanth) + + NEW FEATURES + + IMPROVEMENTS + + HADOOP-5711. Change Namenode file close log to info. (szetszwo) + + HADOOP-5736. Update the capacity scheduler documentation for features + like memory based scheduling, job initialization and removal of pre-emption. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5714. Add a metric for NameNode getFileInfo operation. (Jakob Homan + via szetszwo) + + OPTIMIZATIONS + + BUG FIXES + + HADOOP-5691. Makes org.apache.hadoop.mapreduce.Reducer concrete class + instead of abstract. (Amareshwari Sriramadasu via sharad) + + HADOOP-5646. Fixes a problem in TestQueueCapacities. + (Vinod Kumar Vavilapalli via ddas) + + HADOOP-5655. TestMRServerPorts fails on java.net.BindException. (Devaraj + Das via hairong) + + HADOOP-5654. TestReplicationPolicy. fails on java.net.BindException. + (hairong) + + HADOOP-5688. Fix HftpFileSystem checksum path construction. (Tsz Wo + (Nicholas) Sze via cdouglas) + + HADOOP-4674. Fix fs help messages for -test, -text, -tail, -stat + and -touchz options. (Ravi Phulari via szetszwo) + + HADOOP-5718. Remove the check for the default queue in capacity scheduler. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5719. Remove jobs that failed initialization from the waiting queue + in the capacity scheduler. (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4744. Attaching another fix to the jetty port issue. The TaskTracker + kills itself if it ever discovers that the port to which jetty is actually + bound is invalid (-1). (ddas) + + HADOOP-5349. Fixes a problem in LocalDirAllocator to check for the return + path value that is returned for the case where the file we want to write + is of an unknown size. (Vinod Kumar Vavilapalli via ddas) + + HADOOP-5636. Prevents a job from going to RUNNING state after it has been + KILLED (this used to happen when the SetupTask would come back with a + success after the job has been killed). (Amar Kamat via ddas) + + HADOOP-5641. Fix a NullPointerException in capacity scheduler's memory + based scheduling code when jobs get retired. (yhemanth) + + HADOOP-5828. Use absolute path for mapred.local.dir of JobTracker in + MiniMRCluster. (yhemanth) + +Release 0.20.0 - 2009-04-15 + + INCOMPATIBLE CHANGES + + HADOOP-4210. Fix findbugs warnings for equals implementations of mapred ID + classes. Removed public, static ID::read and ID::forName; made ID an + abstract class. (Suresh Srinivas via cdouglas) + + HADOOP-4253. Fix various warnings generated by findbugs. + Following deprecated methods in RawLocalFileSystem are removed: + public String getName() + public void lock(Path p, boolean shared) + public void release(Path p) + (Suresh Srinivas via johan) + + HADOOP-4618. Move http server from FSNamesystem into NameNode. + FSNamesystem.getNameNodeInfoPort() is removed. + FSNamesystem.getDFSNameNodeMachine() and FSNamesystem.getDFSNameNodePort() + replaced by FSNamesystem.getDFSNameNodeAddress(). + NameNode(bindAddress, conf) is removed. + (shv) + + HADOOP-4567. GetFileBlockLocations returns the NetworkTopology + information of the machines where the blocks reside. (dhruba) + + HADOOP-4435. The JobTracker WebUI displays the amount of heap memory + in use. (dhruba) + + HADOOP-4628. Move Hive into a standalone subproject. (omalley) + + HADOOP-4188. Removes task's dependency on concrete filesystems. + (Sharad Agarwal via ddas) + + HADOOP-1650. Upgrade to Jetty 6. (cdouglas) + + HADOOP-3986. Remove static Configuration from JobClient. (Amareshwari + Sriramadasu via cdouglas) + JobClient::setCommandLineConfig is removed + JobClient::getCommandLineConfig is removed + JobShell, TestJobShell classes are removed + + HADOOP-4422. S3 file systems should not create bucket. + (David Phillips via tomwhite) + + HADOOP-4035. Support memory based scheduling in capacity scheduler. + (Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-3497. Fix bug in overly restrictive file globbing with a + PathFilter. (tomwhite) + + HADOOP-4445. Replace running task counts with running task + percentage in capacity scheduler UI. (Sreekanth Ramakrishnan via + yhemanth) + + HADOOP-4631. Splits the configuration into three parts - one for core, + one for mapred and the last one for HDFS. (Sharad Agarwal via cdouglas) + + HADOOP-3344. Fix libhdfs build to use autoconf and build the same + architecture (32 vs 64 bit) of the JVM running Ant. The libraries for + pipes, utils, and libhdfs are now all in c++//lib. + (Giridharan Kesavan via nigel) + + HADOOP-4874. Remove LZO codec because of licensing issues. (omalley) + + HADOOP-4970. The full path name of a file is preserved inside Trash. + (Prasad Chakka via dhruba) + + HADOOP-4103. NameNode keeps a count of missing blocks. It warns on + WebUI if there are such blocks. '-report' and '-metaSave' have extra + info to track such blocks. (Raghu Angadi) + + HADOOP-4783. Change permissions on history files on the jobtracker + to be only group readable instead of world readable. + (Amareshwari Sriramadasu via yhemanth) + + NEW FEATURES + + HADOOP-4575. Add a proxy service for relaying HsftpFileSystem requests. + Includes client authentication via user certificates and config-based + access control. (Kan Zhang via cdouglas) + + HADOOP-4661. Add DistCh, a new tool for distributed ch{mod,own,grp}. + (szetszwo) + + HADOOP-4709. Add several new features and bug fixes to Chukwa. + Added Hadoop Infrastructure Care Center (UI for visualize data collected + by Chukwa) + Added FileAdaptor for streaming small file in one chunk + Added compression to archive and demux output + Added unit tests and validation for agent, collector, and demux map + reduce job + Added database loader for loading demux output (sequence file) to jdbc + connected database + Added algorithm to distribute collector load more evenly + (Jerome Boulon, Eric Yang, Andy Konwinski, Ariel Rabkin via cdouglas) + + HADOOP-4179. Add Vaidya tool to analyze map/reduce job logs for performanc + problems. (Suhas Gogate via omalley) + + HADOOP-4029. Add NameNode storage information to the dfshealth page and + move DataNode information to a separated page. (Boris Shkolnik via + szetszwo) + + HADOOP-4348. Add service-level authorization for Hadoop. (acmurthy) + + HADOOP-4826. Introduce admin command saveNamespace. (shv) + + HADOOP-3063 BloomMapFile - fail-fast version of MapFile for sparsely + populated key space (Andrzej Bialecki via stack) + + HADOOP-1230. Add new map/reduce API and deprecate the old one. Generally, + the old code should work without problem. The new api is in + org.apache.hadoop.mapreduce and the old classes in org.apache.hadoop.mapred + are deprecated. Differences in the new API: + 1. All of the methods take Context objects that allow us to add new + methods without breaking compatability. + 2. Mapper and Reducer now have a "run" method that is called once and + contains the control loop for the task, which lets applications + replace it. + 3. Mapper and Reducer by default are Identity Mapper and Reducer. + 4. The FileOutputFormats use part-r-00000 for the output of reduce 0 and + part-m-00000 for the output of map 0. + 5. The reduce grouping comparator now uses the raw compare instead of + object compare. + 6. The number of maps in FileInputFormat is controlled by min and max + split size rather than min size and the desired number of maps. + (omalley) + + HADOOP-3305. Use Ivy to manage dependencies. (Giridharan Kesavan + and Steve Loughran via cutting) + + IMPROVEMENTS + + HADOOP-4749. Added a new counter REDUCE_INPUT_BYTES. (Yongqiang He via + zshao) + + HADOOP-4234. Fix KFS "glue" layer to allow applications to interface + with multiple KFS metaservers. (Sriram Rao via lohit) + + HADOOP-4245. Update to latest version of KFS "glue" library jar. + (Sriram Rao via lohit) + + HADOOP-4244. Change test-patch.sh to check Eclipse classpath no matter + it is run by Hudson or not. (szetszwo) + + HADOOP-3180. Add name of missing class to WritableName.getClass + IOException. (Pete Wyckoff via omalley) + + HADOOP-4178. Make the capacity scheduler's default values configurable. + (Sreekanth Ramakrishnan via omalley) + + HADOOP-4262. Generate better error message when client exception has null + message. (stevel via omalley) + + HADOOP-4226. Refactor and document LineReader to make it more readily + understandable. (Yuri Pradkin via cdouglas) + + HADOOP-4238. When listing jobs, if scheduling information isn't available + print NA instead of empty output. (Sreekanth Ramakrishnan via johan) + + HADOOP-4284. Support filters that apply to all requests, or global filters, + to HttpServer. (Kan Zhang via cdouglas) + + HADOOP-4276. Improve the hashing functions and deserialization of the + mapred ID classes. (omalley) + + HADOOP-4485. Add a compile-native ant task, as a shorthand. (enis) + + HADOOP-4454. Allow # comments in slaves file. (Rama Ramasamy via omalley) + + HADOOP-3461. Remove hdfs.StringBytesWritable. (szetszwo) + + HADOOP-4437. Use Halton sequence instead of java.util.Random in + PiEstimator. (szetszwo) + + HADOOP-4572. Change INode and its sub-classes to package private. + (szetszwo) + + HADOOP-4187. Does a runtime lookup for JobConf/JobConfigurable, and if + found, invokes the appropriate configure method. (Sharad Agarwal via ddas) + + HADOOP-4453. Improve ssl configuration and handling in HsftpFileSystem, + particularly when used with DistCp. (Kan Zhang via cdouglas) + + HADOOP-4583. Several code optimizations in HDFS. (Suresh Srinivas via + szetszwo) + + HADOOP-3923. Remove org.apache.hadoop.mapred.StatusHttpServer. (szetszwo) + + HADOOP-4622. Explicitly specify interpretor for non-native + pipes binaries. (Fredrik Hedberg via johan) + + HADOOP-4505. Add a unit test to test faulty setup task and cleanup + task killing the job. (Amareshwari Sriramadasu via johan) + + HADOOP-4608. Don't print a stack trace when the example driver gets an + unknown program to run. (Edward Yoon via omalley) + + HADOOP-4645. Package HdfsProxy contrib project without the extra level + of directories. (Kan Zhang via omalley) + + HADOOP-4126. Allow access to HDFS web UI on EC2 (tomwhite via omalley) + + HADOOP-4612. Removes RunJar's dependency on JobClient. + (Sharad Agarwal via ddas) + + HADOOP-4185. Adds setVerifyChecksum() method to FileSystem. + (Sharad Agarwal via ddas) + + HADOOP-4523. Prevent too many tasks scheduled on a node from bringing + it down by monitoring for cumulative memory usage across tasks. + (Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-4640. Adds an input format that can split lzo compressed + text files. (johan) + + HADOOP-4666. Launch reduces only after a few maps have run in the + Fair Scheduler. (Matei Zaharia via johan) + + HADOOP-4339. Remove redundant calls from FileSystem/FsShell when + generating/processing ContentSummary. (David Phillips via cdouglas) + + HADOOP-2774. Add counters tracking records spilled to disk in MapTask and + ReduceTask. (Ravi Gummadi via cdouglas) + + HADOOP-4513. Initialize jobs asynchronously in the capacity scheduler. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4649. Improve abstraction for spill indices. (cdouglas) + + HADOOP-3770. Add gridmix2, an iteration on the gridmix benchmark. (Runping + Qi via cdouglas) + + HADOOP-4708. Add support for dfsadmin commands in TestCLI. (Boris Shkolnik + via cdouglas) + + HADOOP-4758. Add a splitter for metrics contexts to support more than one + type of collector. (cdouglas) + + HADOOP-4722. Add tests for dfsadmin quota error messages. (Boris Shkolnik + via cdouglas) + + HADOOP-4690. fuse-dfs - create source file/function + utils + config + + main source files. (pete wyckoff via mahadev) + + HADOOP-3750. Fix and enforce module dependencies. (Sharad Agarwal via + tomwhite) + + HADOOP-4747. Speed up FsShell::ls by removing redundant calls to the + filesystem. (David Phillips via cdouglas) + + HADOOP-4305. Improves the blacklisting strategy, whereby, tasktrackers + that are blacklisted are not given tasks to run from other jobs, subject + to the following conditions (all must be met): + 1) The TaskTracker has been blacklisted by at least 4 jobs (configurable) + 2) The TaskTracker has been blacklisted 50% more number of times than + the average (configurable) + 3) The cluster has less than 50% trackers blacklisted + Once in 24 hours, a TaskTracker blacklisted for all jobs is given a chance. + Restarting the TaskTracker moves it out of the blacklist. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4688. Modify the MiniMRDFSSort unit test to spill multiple times, + exercising the map-side merge code. (cdouglas) + + HADOOP-4737. Adds the KILLED notification when jobs get killed. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4728. Add a test exercising different namenode configurations. + (Boris Shkolnik via cdouglas) + + HADOOP-4807. Adds JobClient commands to get the active/blacklisted tracker + names. Also adds commands to display running/completed task attempt IDs. + (ddas) + + HADOOP-4699. Remove checksum validation from map output servlet. (cdouglas) + + HADOOP-4838. Added a registry to automate metrics and mbeans management. + (Sanjay Radia via acmurthy) + + HADOOP-3136. Fixed the default scheduler to assign multiple tasks to each + tasktracker per heartbeat, when feasible. To ensure locality isn't hurt + too badly, the scheudler will not assign more than one off-switch task per + heartbeat. The heartbeat interval is also halved since the task-tracker is + fixed to no longer send out heartbeats on each task completion. A + slow-start for scheduling reduces is introduced to ensure that reduces + aren't started till sufficient number of maps are done, else reduces of + jobs whose maps aren't scheduled might swamp the cluster. + Configuration changes to mapred-default.xml: + add mapred.reduce.slowstart.completed.maps + (acmurthy) + + HADOOP-4545. Add example and test case of secondary sort for the reduce. + (omalley) + + HADOOP-4753. Refactor gridmix2 to reduce code duplication. (cdouglas) + + HADOOP-4909. Fix Javadoc and make some of the API more consistent in their + use of the JobContext instead of Configuration. (omalley) + + HADOOP-4920. Stop storing Forrest output in Subversion. (cutting) + + HADOOP-4948. Add parameters java5.home and forrest.home to the ant commands + in test-patch.sh. (Giridharan Kesavan via szetszwo) + + HADOOP-4830. Add end-to-end test cases for testing queue capacities. + (Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-4980. Improve code layout of capacity scheduler to make it + easier to fix some blocker bugs. (Vivek Ratan via yhemanth) + + HADOOP-4916. Make user/location of Chukwa installation configurable by an + external properties file. (Eric Yang via cdouglas) + + HADOOP-4950. Make the CompressorStream, DecompressorStream, + BlockCompressorStream, and BlockDecompressorStream public to facilitate + non-Hadoop codecs. (omalley) + + HADOOP-4843. Collect job history and configuration in Chukwa. (Eric Yang + via cdouglas) + + HADOOP-5030. Build Chukwa RPM to install into configured directory. (Eric + Yang via cdouglas) + + HADOOP-4828. Updates documents to do with configuration (HADOOP-4631). + (Sharad Agarwal via ddas) + + HADOOP-4939. Adds a test that would inject random failures for tasks in + large jobs and would also inject TaskTracker failures. (ddas) + + HADOOP-4944. A configuration file can include other configuration + files. (Rama Ramasamy via dhruba) + + HADOOP-4804. Provide Forrest documentation for the Fair Scheduler. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-5248. A testcase that checks for the existence of job directory + after the job completes. Fails if it exists. (ddas) + + HADOOP-4664. Introduces multiple job initialization threads, where the + number of threads are configurable via mapred.jobinit.threads. + (Matei Zaharia and Jothi Padmanabhan via ddas) + + HADOOP-4191. Adds a testcase for JobHistory. (Ravi Gummadi via ddas) + + HADOOP-5466. Change documenation CSS style for headers and code. (Corinne + Chandel via szetszwo) + + HADOOP-5275. Add ivy directory and files to built tar. + (Giridharan Kesavan via nigel) + + HADOOP-5468. Add sub-menus to forrest documentation and make some minor + edits. (Corinne Chandel via szetszwo) + + HADOOP-5437. Fix TestMiniMRDFSSort to properly test jvm-reuse. (omalley) + + HADOOP-5521. Removes dependency of TestJobInProgress on RESTART_COUNT + JobHistory tag. (Ravi Gummadi via ddas) + + OPTIMIZATIONS + + HADOOP-3293. Fixes FileInputFormat to do provide locations for splits + based on the rack/host that has the most number of bytes. + (Jothi Padmanabhan via ddas) + + HADOOP-4683. Fixes Reduce shuffle scheduler to invoke + getMapCompletionEvents in a separate thread. (Jothi Padmanabhan + via ddas) + + BUG FIXES + + HADOOP-4204. Fix findbugs warnings related to unused variables, naive + Number subclass instantiation, Map iteration, and badly scoped inner + classes. (Suresh Srinivas via cdouglas) + + HADOOP-4207. Update derby jar file to release 10.4.2 release. + (Prasad Chakka via dhruba) + + HADOOP-4325. SocketInputStream.read() should return -1 in case EOF. + (Raghu Angadi) + + HADOOP-4408. FsAction functions need not create new objects. (cdouglas) + + HADOOP-4440. TestJobInProgressListener tests for jobs killed in queued + state (Amar Kamat via ddas) + + HADOOP-4346. Implement blocking connect so that Hadoop is not affected + by selector problem with JDK default implementation. (Raghu Angadi) + + HADOOP-4388. If there are invalid blocks in the transfer list, Datanode + should handle them and keep transferring the remaining blocks. (Suresh + Srinivas via szetszwo) + + HADOOP-4587. Fix a typo in Mapper javadoc. (Koji Noguchi via szetszwo) + + HADOOP-4530. In fsck, HttpServletResponse sendError fails with + IllegalStateException. (hairong) + + HADOOP-4377. Fix a race condition in directory creation in + NativeS3FileSystem. (David Phillips via cdouglas) + + HADOOP-4621. Fix javadoc warnings caused by duplicate jars. (Kan Zhang via + cdouglas) + + HADOOP-4566. Deploy new hive code to support more types. + (Zheng Shao via dhruba) + + HADOOP-4571. Add chukwa conf files to svn:ignore list. (Eric Yang via + szetszwo) + + HADOOP-4589. Correct PiEstimator output messages and improve the code + readability. (szetszwo) + + HADOOP-4650. Correct a mismatch between the default value of + local.cache.size in the config and the source. (Jeff Hammerbacher via + cdouglas) + + HADOOP-4606. Fix cygpath error if the log directory does not exist. + (szetszwo via omalley) + + HADOOP-4141. Fix bug in ScriptBasedMapping causing potential infinite + loop on misconfigured hadoop-site. (Aaron Kimball via tomwhite) + + HADOOP-4691. Correct a link in the javadoc of IndexedSortable. (szetszwo) + + HADOOP-4598. '-setrep' command skips under-replicated blocks. (hairong) + + HADOOP-4429. Set defaults for user, group in UnixUserGroupInformation so + login fails more predictably when misconfigured. (Alex Loddengaard via + cdouglas) + + HADOOP-4676. Fix broken URL in blacklisted tasktrackers page. (Amareshwari + Sriramadasu via cdouglas) + + HADOOP-3422 Ganglia counter metrics are all reported with the metric + name "value", so the counter values can not be seen. (Jason Attributor + and Brian Bockelman via stack) + + HADOOP-4704. Fix javadoc typos "the the". (szetszwo) + + HADOOP-4677. Fix semantics of FileSystem::getBlockLocations to return + meaningful values. (Hong Tang via cdouglas) + + HADOOP-4669. Use correct operator when evaluating whether access time is + enabled (Dhruba Borthakur via cdouglas) + + HADOOP-4732. Pass connection and read timeouts in the correct order when + setting up fetch in reduce. (Amareshwari Sriramadasu via cdouglas) + + HADOOP-4558. Fix capacity reclamation in capacity scheduler. + (Amar Kamat via yhemanth) + + HADOOP-4770. Fix rungridmix_2 script to work with RunJar. (cdouglas) + + HADOOP-4738. When using git, the saveVersion script will use only the + commit hash for the version and not the message, which requires escaping. + (cdouglas) + + HADOOP-4576. Show pending job count instead of task count in the UI per + queue in capacity scheduler. (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4623. Maintain running tasks even if speculative execution is off. + (Amar Kamat via yhemanth) + + HADOOP-4786. Fix broken compilation error in + TestTrackerBlacklistAcrossJobs. (yhemanth) + + HADOOP-4785. Fixes theJobTracker heartbeat to not make two calls to + System.currentTimeMillis(). (Amareshwari Sriramadasu via ddas) + + HADOOP-4792. Add generated Chukwa configuration files to version control + ignore lists. (cdouglas) + + HADOOP-4796. Fix Chukwa test configuration, remove unused components. (Eric + Yang via cdouglas) + + HADOOP-4708. Add binaries missed in the initial checkin for Chukwa. (Eric + Yang via cdouglas) + + HADOOP-4805. Remove black list collector from Chukwa Agent HTTP Sender. + (Eric Yang via cdouglas) + + HADOOP-4837. Move HADOOP_CONF_DIR configuration to chukwa-env.sh (Jerome + Boulon via cdouglas) + + HADOOP-4825. Use ps instead of jps for querying process status in Chukwa. + (Eric Yang via cdouglas) + + HADOOP-4844. Fixed javadoc for + org.apache.hadoop.fs.permission.AccessControlException to document that + it's deprecated in favour of + org.apache.hadoop.security.AccessControlException. (acmurthy) + + HADOOP-4706. Close the underlying output stream in + IFileOutputStream::close. (Jothi Padmanabhan via cdouglas) + + HADOOP-4855. Fixed command-specific help messages for refreshServiceAcl in + DFSAdmin and MRAdmin. (acmurthy) + + HADOOP-4820. Remove unused method FSNamesystem::deleteInSafeMode. (Suresh + Srinivas via cdouglas) + + HADOOP-4698. Lower io.sort.mb to 10 in the tests and raise the junit memory + limit to 512m from 256m. (Nigel Daley via cdouglas) + + HADOOP-4860. Split TestFileTailingAdapters into three separate tests to + avoid contention. (Eric Yang via cdouglas) + + HADOOP-3921. Fixed clover (code coverage) target to work with JDK 6. + (tomwhite via nigel) + + HADOOP-4845. Modify the reduce input byte counter to record only the + compressed size and add a human-readable label. (Yongqiang He via cdouglas) + + HADOOP-4458. Add a test creating symlinks in the working directory. + (Amareshwari Sriramadasu via cdouglas) + + HADOOP-4879. Fix org.apache.hadoop.mapred.Counters to correctly define + Object.equals rather than depend on contentEquals api. (omalley via + acmurthy) + + HADOOP-4791. Fix rpm build process for Chukwa. (Eric Yang via cdouglas) + + HADOOP-4771. Correct initialization of the file count for directories + with quotas. (Ruyue Ma via shv) + + HADOOP-4878. Fix eclipse plugin classpath file to point to ivy's resolved + lib directory and added the same to test-patch.sh. (Giridharan Kesavan via + acmurthy) + + HADOOP-4774. Fix default values of some capacity scheduler configuration + items which would otherwise not work on a fresh checkout. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4876. Fix capacity scheduler reclamation by updating count of + pending tasks correctly. (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4849. Documentation for Service Level Authorization implemented in + HADOOP-4348. (acmurthy) + + HADOOP-4827. Replace Consolidator with Aggregator macros in Chukwa (Eric + Yang via cdouglas) + + HADOOP-4894. Correctly parse ps output in Chukwa jettyCollector.sh. (Ari + Rabkin via cdouglas) + + HADOOP-4892. Close fds out of Chukwa ExecPlugin. (Ari Rabkin via cdouglas) + + HADOOP-4889. Fix permissions in RPM packaging. (Eric Yang via cdouglas) + + HADOOP-4869. Fixes the TT-JT heartbeat to have an explicit flag for + restart apart from the initialContact flag that there was earlier. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4716. Fixes ReduceTask.java to clear out the mapping between + hosts and MapOutputLocation upon a JT restart (Amar Kamat via ddas) + + HADOOP-4880. Removes an unnecessary testcase from TestJobTrackerRestart. + (Amar Kamat via ddas) + + HADOOP-4924. Fixes a race condition in TaskTracker re-init. (ddas) + + HADOOP-4854. Read reclaim capacity interval from capacity scheduler + configuration. (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4896. HDFS Fsck does not load HDFS configuration. (Raghu Angadi) + + HADOOP-4956. Creates TaskStatus for failed tasks with an empty Counters + object instead of null. (ddas) + + HADOOP-4979. Fix capacity scheduler to block cluster for failed high + RAM requirements across task types. (Vivek Ratan via yhemanth) + + HADOOP-4949. Fix native compilation. (Chris Douglas via acmurthy) + + HADOOP-4787. Fixes the testcase TestTrackerBlacklistAcrossJobs which was + earlier failing randomly. (Amareshwari Sriramadasu via ddas) + + HADOOP-4914. Add description fields to Chukwa init.d scripts (Eric Yang via + cdouglas) + + HADOOP-4884. Make tool tip date format match standard HICC format. (Eric + Yang via cdouglas) + + HADOOP-4925. Make Chukwa sender properties configurable. (Ari Rabkin via + cdouglas) + + HADOOP-4947. Make Chukwa command parsing more forgiving of whitespace. (Ari + Rabkin via cdouglas) + + HADOOP-5026. Make chukwa/bin scripts executable in repository. (Andy + Konwinski via cdouglas) + + HADOOP-4977. Fix a deadlock between the reclaimCapacity and assignTasks + in capacity scheduler. (Vivek Ratan via yhemanth) + + HADOOP-4988. Fix reclaim capacity to work even when there are queues with + no capacity. (Vivek Ratan via yhemanth) + + HADOOP-5065. Remove generic parameters from argument to + setIn/OutputFormatClass so that it works with SequenceIn/OutputFormat. + (cdouglas via omalley) + + HADOOP-4818. Pass user config to instrumentation API. (Eric Yang via + cdouglas) + + HADOOP-4993. Fix Chukwa agent configuration and startup to make it both + more modular and testable. (Ari Rabkin via cdouglas) + + HADOOP-5048. Fix capacity scheduler to correctly cleanup jobs that are + killed after initialization, but before running. + (Sreekanth Ramakrishnan via yhemanth) + + HADOOP-4671. Mark loop control variables shared between threads as + volatile. (cdouglas) + + HADOOP-5079. HashFunction inadvertently destroys some randomness + (Jonathan Ellis via stack) + + HADOOP-4999. A failure to write to FsEditsLog results in + IndexOutOfBounds exception. (Boris Shkolnik via rangadi) + + HADOOP-5139. Catch IllegalArgumentException during metrics registration + in RPC. (Hairong Kuang via szetszwo) + + HADOOP-5085. Copying a file to local with Crc throws an exception. + (hairong) + + HADOOP-5211. Fix check for job completion in TestSetupAndCleanupFailure. + (enis) + + HADOOP-5254. The Configuration class should be able to work with XML + parsers that do not support xmlinclude. (Steve Loughran via dhruba) + + HADOOP-4692. Namenode in infinite loop for replicating/deleting corrupt + blocks. (hairong) + + HADOOP-5255. Fix use of Math.abs to avoid overflow. (Jonathan Ellis via + cdouglas) + + HADOOP-5269. Fixes a problem to do with tasktracker holding on to + FAILED_UNCLEAN or KILLED_UNCLEAN tasks forever. (Amareshwari Sriramadasu + via ddas) + + HADOOP-5214. Fixes a ConcurrentModificationException while the Fairshare + Scheduler accesses the tasktrackers stored by the JobTracker. + (Rahul Kumar Singh via yhemanth) + + HADOOP-5233. Addresses the three issues - Race condition in updating + status, NPE in TaskTracker task localization when the conf file is missing + (HADOOP-5234) and NPE in handling KillTaskAction of a cleanup task + (HADOOP-5235). (Amareshwari Sriramadasu via ddas) + + HADOOP-5247. Introduces a broadcast of KillJobAction to all trackers when + a job finishes. This fixes a bunch of problems to do with NPE when a + completed job is not in memory and a tasktracker comes to the jobtracker + with a status report of a task belonging to that job. (Amar Kamat via ddas) + + HADOOP-5282. Fixed job history logs for task attempts that are + failed by the JobTracker, say due to lost task trackers. (Amar + Kamat via yhemanth) + + HADOOP-5241. Fixes a bug in disk-space resource estimation. Makes + the estimation formula linear where blowUp = + Total-Output/Total-Input. (Sharad Agarwal via ddas) + + HADOOP-5142. Fix MapWritable#putAll to store key/value classes. + (Do??acan G??ney via enis) + + HADOOP-4744. Workaround for jetty6 returning -1 when getLocalPort + is invoked on the connector. The workaround patch retries a few + times before failing. (Jothi Padmanabhan via yhemanth) + + HADOOP-5280. Adds a check to prevent a task state transition from + FAILED to any of UNASSIGNED, RUNNING, COMMIT_PENDING or + SUCCEEDED. (ddas) + + HADOOP-5272. Fixes a problem to do with detecting whether an + attempt is the first attempt of a Task. This affects JobTracker + restart. (Amar Kamat via ddas) + + HADOOP-5306. Fixes a problem to do with logging/parsing the http port of a + lost tracker. Affects JobTracker restart. (Amar Kamat via ddas) + + HADOOP-5111. Fix Job::set* methods to work with generics. (cdouglas) + + HADOOP-5274. Fix gridmix2 dependency on wordcount example. (cdouglas) + + HADOOP-5145. Balancer sometimes runs out of memory after running + days or weeks. (hairong) + + HADOOP-5338. Fix jobtracker restart to clear task completion + events cached by tasktrackers forcing them to fetch all events + afresh, thus avoiding missed task completion events on the + tasktrackers. (Amar Kamat via yhemanth) + + HADOOP-4695. Change TestGlobalFilter so that it allows a web page to be + filtered more than once for a single access. (Kan Zhang via szetszwo) + + HADOOP-5298. Change TestServletFilter so that it allows a web page to be + filtered more than once for a single access. (szetszwo) + + HADOOP-5432. Disable ssl during unit tests in hdfsproxy, as it is unused + and causes failures. (cdouglas) + + HADOOP-5416. Correct the shell command "fs -test" forrest doc description. + (Ravi Phulari via szetszwo) + + HADOOP-5327. Fixed job tracker to remove files from system directory on + ACL check failures and also check ACLs on restart. + (Amar Kamat via yhemanth) + + HADOOP-5395. Change the exception message when a job is submitted to an + invalid queue. (Rahul Kumar Singh via yhemanth) + + HADOOP-5276. Fixes a problem to do with updating the start time of + a task when the tracker that ran the task is lost. (Amar Kamat via + ddas) + + HADOOP-5278. Fixes a problem to do with logging the finish time of + a task during recovery (after a JobTracker restart). (Amar Kamat + via ddas) + + HADOOP-5490. Fixes a synchronization problem in the + EagerTaskInitializationListener class. (Jothi Padmanabhan via + ddas) + + HADOOP-5493. The shuffle copier threads return the codecs back to + the pool when the shuffle completes. (Jothi Padmanabhan via ddas) + + HADOOP-5414. Fixes IO exception while executing hadoop fs -touchz + fileName by making sure that lease renewal thread exits before dfs + client exits. (hairong) + + HADOOP-5103. FileInputFormat now reuses the clusterMap network + topology object and that brings down the log messages in the + JobClient to do with NetworkTopology.add significantly. (Jothi + Padmanabhan via ddas) + + HADOOP-5483. Fixes a problem in the Directory Cleanup Thread due to which + TestMiniMRWithDFS sometimes used to fail. (ddas) + + HADOOP-5281. Prevent sharing incompatible ZlibCompressor instances between + GzipCodec and DefaultCodec. (cdouglas) + + HADOOP-5463. Balancer throws "Not a host:port pair" unless port is + specified in fs.default.name. (Stuart White via hairong) + + HADOOP-5514. Fix JobTracker metrics and add metrics for wating, failed + tasks. (cdouglas) + + HADOOP-5516. Fix NullPointerException in TaskMemoryManagerThread + that comes when monitored processes disappear when the thread is + running. (Vinod Kumar Vavilapalli via yhemanth) + + HADOOP-5382. Support combiners in the new context object API. (omalley) + + HADOOP-5471. Fixes a problem to do with updating the log.index file in the + case where a cleanup task is run. (Amareshwari Sriramadasu via ddas) + + HADOOP-5534. Fixed a deadlock in Fair scheduler's servlet. + (Rahul Kumar Singh via yhemanth) + + HADOOP-5328. Fixes a problem in the renaming of job history files during + job recovery. Amar Kamat via ddas) + + HADOOP-5417. Don't ignore InterruptedExceptions that happen when calling + into rpc. (omalley) + + HADOOP-5320. Add a close() in TestMapReduceLocal. (Jothi Padmanabhan + via szetszwo) + + HADOOP-5520. Fix a typo in disk quota help message. (Ravi Phulari + via szetszwo) + + HADOOP-5519. Remove claims from mapred-default.xml that prime numbers + of tasks are helpful. (Owen O'Malley via szetszwo) + + HADOOP-5484. TestRecoveryManager fails wtih FileAlreadyExistsException. + (Amar Kamat via hairong) + + HADOOP-5564. Limit the JVM heap size in the java command for initializing + JAVA_PLATFORM. (Suresh Srinivas via szetszwo) + + HADOOP-5565. Add API for failing/finalized jobs to the JT metrics + instrumentation. (Jerome Boulon via cdouglas) + + HADOOP-5390. Remove duplicate jars from tarball, src from binary tarball + added by hdfsproxy. (Zhiyong Zhang via cdouglas) + + HADOOP-5066. Building binary tarball should not build docs/javadocs, copy + src, or run jdiff. (Giridharan Kesavan via cdouglas) + + HADOOP-5459. Fix undetected CRC errors where intermediate output is closed + before it has been completely consumed. (cdouglas) + + HADOOP-5571. Remove widening primitive conversion in TupleWritable mask + manipulation. (Jingkei Ly via cdouglas) + + HADOOP-5588. Remove an unnecessary call to listStatus(..) in + FileSystem.globStatusInternal(..). (Hairong Kuang via szetszwo) + + HADOOP-5473. Solves a race condition in killing a task - the state is KILLED + if there is a user request pending to kill the task and the TT reported + the state as SUCCESS. (Amareshwari Sriramadasu via ddas) + + HADOOP-5576. Fix LocalRunner to work with the new context object API in + mapreduce. (Tom White via omalley) + + HADOOP-4374. Installs a shutdown hook in the Task JVM so that log.index is + updated before the JVM exits. Also makes the update to log.index atomic. + (Ravi Gummadi via ddas) + + HADOOP-5577. Add a verbose flag to mapreduce.Job.waitForCompletion to get + the running job's information printed to the user's stdout as it runs. + (omalley) + + HADOOP-5607. Fix NPE in TestCapacityScheduler. (cdouglas) + + HADOOP-5605. All the replicas incorrectly got marked as corrupt. (hairong) + + HADOOP-5337. JobTracker, upon restart, now waits for the TaskTrackers to + join back before scheduling new tasks. This fixes race conditions associated + with greedy scheduling as was the case earlier. (Amar Kamat via ddas) + + HADOOP-5227. Fix distcp so -update and -delete can be meaningfully + combined. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-5305. Increase number of files and print debug messages in + TestCopyFiles. (szetszwo) + + HADOOP-5548. Add synchronization for JobTracker methods in RecoveryManager. + (Amareshwari Sriramadasu via sharad) + + HADOOP-3810. NameNode seems unstable on a cluster with little space left. + (hairong) + + HADOOP-5068. Fix NPE in TestCapacityScheduler. (Vinod Kumar Vavilapalli + via szetszwo) + + HADOOP-5585. Clear FileSystem statistics between tasks when jvm-reuse + is enabled. (omalley) + + HADOOP-5394. JobTracker might schedule 2 attempts of the same task + with the same attempt id across restarts. (Amar Kamat via sharad) + + HADOOP-5645. After HADOOP-4920 we need a place to checkin + releasenotes.html. (nigel) + +Release 0.19.2 - Unreleased + + BUG FIXES + + HADOOP-5154. Fixes a deadlock in the fairshare scheduler. + (Matei Zaharia via yhemanth) + + HADOOP-5146. Fixes a race condition that causes LocalDirAllocator to miss + files. (Devaraj Das via yhemanth) + + HADOOP-4638. Fixes job recovery to not crash the job tracker for problems + with a single job file. (Amar Kamat via yhemanth) + + HADOOP-5384. Fix a problem that DataNodeCluster creates blocks with + generationStamp == 1. (szetszwo) + + HADOOP-5376. Fixes the code handling lost tasktrackers to set the task state + to KILLED_UNCLEAN only for relevant type of tasks. + (Amareshwari Sriramadasu via yhemanth) + + HADOOP-5285. Fixes the issues - (1) obtainTaskCleanupTask checks whether job is + inited before trying to lock the JobInProgress (2) Moves the CleanupQueue class + outside the TaskTracker and makes it a generic class that is used by the + JobTracker also for deleting the paths on the job's output fs. (3) Moves the + references to completedJobStore outside the block where the JobTracker is locked. + (ddas) + + HADOOP-5392. Fixes a problem to do with JT crashing during recovery when + the job files are garbled. (Amar Kamat vi ddas) + + HADOOP-5332. Appending to files is not allowed (by default) unless + dfs.support.append is set to true. (dhruba) + + HADOOP-5333. libhdfs supports appending to files. (dhruba) + + HADOOP-3998. Fix dfsclient exception when JVM is shutdown. (dhruba) + + HADOOP-5440. Fixes a problem to do with removing a taskId from the list + of taskIds that the TaskTracker's TaskMemoryManager manages. + (Amareshwari Sriramadasu via ddas) + + HADOOP-5446. Restore TaskTracker metrics. (cdouglas) + + HADOOP-5449. Fixes the history cleaner thread. + (Amareshwari Sriramadasu via ddas) + + HADOOP-5479. NameNode should not send empty block replication request to + DataNode. (hairong) + + HADOOP-5259. Job with output hdfs:/user//outputpath (no + authority) fails with Wrong FS. (Doug Cutting via hairong) + + HADOOP-5522. Documents the setup/cleanup tasks in the mapred tutorial. + (Amareshwari Sriramadasu via ddas) + + HADOOP-5549. ReplicationMonitor should schedule both replication and + deletion work in one iteration. (hairong) + + HADOOP-5554. DataNodeCluster and CreateEditsLog should create blocks with + the same generation stamp value. (hairong via szetszwo) + + HADOOP-5231. Clones the TaskStatus before passing it to the JobInProgress. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4719. Fix documentation of 'ls' format for FsShell. (Ravi Phulari + via cdouglas) + + HADOOP-5374. Fixes a NPE problem in getTasksToSave method. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4780. Cache the size of directories in DistributedCache, avoiding + long delays in recalculating it. (He Yongqiang via cdouglas) + + HADOOP-5551. Prevent directory destruction on file create. + (Brian Bockelman via shv) + + HADOOP-5671. Fix FNF exceptions when copying from old versions of + HftpFileSystem. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-5213. Fix Null pointer exception caused when bzip2compression + was used and user closed a output stream without writing any data. + (Zheng Shao via dhruba) + + HADOOP-5579. Set errno correctly in libhdfs for permission, quota, and FNF + conditions. (Brian Bockelman via cdouglas) + +Release 0.19.1 - 2009-02-23 + + IMPROVEMENTS + + HADOOP-4739. Fix spelling and grammar, improve phrasing of some sections in + mapred tutorial. (Vivek Ratan via cdouglas) + + HADOOP-3894. DFSClient logging improvements. (Steve Loughran via shv) + + HADOOP-5126. Remove empty file BlocksWithLocations.java (shv) + + HADOOP-5127. Remove public methods in FSDirectory. (Jakob Homan via shv) + + BUG FIXES + + HADOOP-4697. Fix getBlockLocations in KosmosFileSystem to handle multiple + blocks correctly. (Sriram Rao via cdouglas) + + HADOOP-4420. Add null checks for job, caused by invalid job IDs. + (Aaron Kimball via tomwhite) + + HADOOP-4632. Fix TestJobHistoryVersion to use test.build.dir instead of the + current workding directory for scratch space. (Amar Kamat via cdouglas) + + HADOOP-4508. Fix FSDataOutputStream.getPos() for append. (dhruba via + szetszwo) + + HADOOP-4727. Fix a group checking bug in fill_stat_structure(...) in + fuse-dfs. (Brian Bockelman via szetszwo) + + HADOOP-4836. Correct typos in mapred related documentation. (Jord? Polo + via szetszwo) + + HADOOP-4821. Usage description in the Quotas guide documentations are + incorrect. (Boris Shkolnik via hairong) + + HADOOP-4847. Moves the loading of OutputCommitter to the Task. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4966. Marks completed setup tasks for removal. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4982. TestFsck should run in Eclipse. (shv) + + HADOOP-5008. TestReplication#testPendingReplicationRetry leaves an opened + fd unclosed. (hairong) + + HADOOP-4906. Fix TaskTracker OOM by keeping a shallow copy of JobConf in + TaskTracker.TaskInProgress. (Sharad Agarwal via acmurthy) + + HADOOP-4918. Fix bzip2 compression to work with Sequence Files. + (Zheng Shao via dhruba). + + HADOOP-4965. TestFileAppend3 should close FileSystem. (shv) + + HADOOP-4967. Fixes a race condition in the JvmManager to do with killing + tasks. (ddas) + + HADOOP-5009. DataNode#shutdown sometimes leaves data block scanner + verification log unclosed. (hairong) + + HADOOP-5086. Use the appropriate FileSystem for trash URIs. (cdouglas) + + HADOOP-4955. Make DBOutputFormat us column names from setOutput(). + (Kevin Peterson via enis) + + HADOOP-4862. Minor : HADOOP-3678 did not remove all the cases of + spurious IOExceptions logged by DataNode. (Raghu Angadi) + + HADOOP-5034. NameNode should send both replication and deletion requests + to DataNode in one reply to a heartbeat. (hairong) + + HADOOP-4759. Removes temporary output directory for failed and killed + tasks by launching special CLEANUP tasks for the same. + (Amareshwari Sriramadasu via ddas) + + HADOOP-5161. Accepted sockets do not get placed in + DataXceiverServer#childSockets. (hairong) + + HADOOP-5193. Correct calculation of edits modification time. (shv) + + HADOOP-4494. Allow libhdfs to append to files. + (Pete Wyckoff via dhruba) + + HADOOP-5166. Fix JobTracker restart to work when ACLs are configured + for the JobTracker. (Amar Kamat via yhemanth). + + HADOOP-5067. Fixes TaskInProgress.java to keep track of count of failed and + killed tasks correctly. (Amareshwari Sriramadasu via ddas) + + HADOOP-4760. HDFS streams should not throw exceptions when closed twice. + (enis) + +Release 0.19.0 - 2008-11-18 + + INCOMPATIBLE CHANGES + + HADOOP-3595. Remove deprecated methods for mapred.combine.once + functionality, which was necessary to providing backwards + compatible combiner semantics for 0.18. (cdouglas via omalley) + + HADOOP-3667. Remove the following deprecated methods from JobConf: + addInputPath(Path) + getInputPaths() + getMapOutputCompressionType() + getOutputPath() + getSystemDir() + setInputPath(Path) + setMapOutputCompressionType(CompressionType style) + setOutputPath(Path) + (Amareshwari Sriramadasu via omalley) + + HADOOP-3652. Remove deprecated class OutputFormatBase. + (Amareshwari Sriramadasu via cdouglas) + + HADOOP-2885. Break the hadoop.dfs package into separate packages under + hadoop.hdfs that reflect whether they are client, server, protocol, + etc. DistributedFileSystem and DFSClient have moved and are now + considered package private. (Sanjay Radia via omalley) + + HADOOP-2325. Require Java 6. (cutting) + + HADOOP-372. Add support for multiple input paths with a different + InputFormat and Mapper for each path. (Chris Smith via tomwhite) + + HADOOP-1700. Support appending to file in HDFS. (dhruba) + + HADOOP-3792. Make FsShell -test consistent with unix semantics, returning + zero for true and non-zero for false. (Ben Slusky via cdouglas) + + HADOOP-3664. Remove the deprecated method InputFormat.validateInput, + which is no longer needed. (tomwhite via omalley) + + HADOOP-3549. Give more meaningful errno's in libhdfs. In particular, + EACCES is returned for permission problems. (Ben Slusky via omalley) + + HADOOP-4036. ResourceStatus was added to TaskTrackerStatus by HADOOP-3759, + so increment the InterTrackerProtocol version. (Hemanth Yamijala via + omalley) + + HADOOP-3150. Moves task promotion to tasks. Defines a new interface for + committing output files. Moves job setup to jobclient, and moves jobcleanup + to a separate task. (Amareshwari Sriramadasu via ddas) + + HADOOP-3446. Keep map outputs in memory during the reduce. Remove + fs.inmemory.size.mb and replace with properties defining in memory map + output retention during the shuffle and reduce relative to maximum heap + usage. (cdouglas) + + HADOOP-3245. Adds the feature for supporting JobTracker restart. Running + jobs can be recovered from the history file. The history file format has + been modified to support recovery. The task attempt ID now has the + JobTracker start time to disinguish attempts of the same TIP across + restarts. (Amar Ramesh Kamat via ddas) + + HADOOP-4007. REMOVE DFSFileInfo - FileStatus is sufficient. + (Sanjay Radia via hairong) + + HADOOP-3722. Fixed Hadoop Streaming and Hadoop Pipes to use the Tool + interface and GenericOptionsParser. (Enis Soztutar via acmurthy) + + HADOOP-2816. Cluster summary at name node web reports the space + utilization as: + Configured Capacity: capacity of all the data directories - Reserved space + Present Capacity: Space available for dfs,i.e. remaining+used space + DFS Used%: DFS used space/Present Capacity + (Suresh Srinivas via hairong) + + HADOOP-3938. Disk space quotas for HDFS. This is similar to namespace + quotas in 0.18. (rangadi) + + HADOOP-4293. Make Configuration Writable and remove unreleased + WritableJobConf. Configuration.write is renamed to writeXml. (omalley) + + HADOOP-4281. Change dfsadmin to report available disk space in a format + consistent with the web interface as defined in HADOOP-2816. (Suresh + Srinivas via cdouglas) + + HADOOP-4430. Further change the cluster summary at name node web that was + changed in HADOOP-2816: + Non DFS Used - This indicates the disk space taken by non DFS file from + the Configured capacity + DFS Used % - DFS Used % of Configured Capacity + DFS Remaining % - Remaing % Configured Capacity available for DFS use + DFS command line report reflects the same change. Config parameter + dfs.datanode.du.pct is no longer used and is removed from the + hadoop-default.xml. (Suresh Srinivas via hairong) + + HADOOP-4116. Balancer should provide better resource management. (hairong) + + HADOOP-4599. BlocksMap and BlockInfo made package private. (shv) + + NEW FEATURES + + HADOOP-3341. Allow streaming jobs to specify the field separator for map + and reduce input and output. The new configuration values are: + stream.map.input.field.separator + stream.map.output.field.separator + stream.reduce.input.field.separator + stream.reduce.output.field.separator + All of them default to "\t". (Zheng Shao via omalley) + + HADOOP-3479. Defines the configuration file for the resource manager in + Hadoop. You can configure various parameters related to scheduling, such + as queues and queue properties here. The properties for a queue follow a + naming convention,such as, hadoop.rm.queue.queue-name.property-name. + (Hemanth Yamijala via ddas) + + HADOOP-3149. Adds a way in which map/reducetasks can create multiple + outputs. (Alejandro Abdelnur via ddas) + + HADOOP-3714. Add a new contrib, bash-tab-completion, which enables + bash tab completion for the bin/hadoop script. See the README file + in the contrib directory for the installation. (Chris Smith via enis) + + HADOOP-3730. Adds a new JobConf constructor that disables loading + default configurations. (Alejandro Abdelnur via ddas) + + HADOOP-3772. Add a new Hadoop Instrumentation api for the JobTracker and + the TaskTracker, refactor Hadoop Metrics as an implementation of the api. + (Ari Rabkin via acmurthy) + + HADOOP-2302. Provides a comparator for numerical sorting of key fields. + (ddas) + + HADOOP-153. Provides a way to skip bad records. (Sharad Agarwal via ddas) + + HADOOP-657. Free disk space should be modelled and used by the scheduler + to make scheduling decisions. (Ari Rabkin via omalley) + + HADOOP-3719. Initial checkin of Chukwa, which is a data collection and + analysis framework. (Jerome Boulon, Andy Konwinski, Ari Rabkin, + and Eric Yang) + + HADOOP-3873. Add -filelimit and -sizelimit options to distcp to cap the + number of files/bytes copied in a particular run to support incremental + updates and mirroring. (TszWo (Nicholas), SZE via cdouglas) + + HADOOP-3585. FailMon package for hardware failure monitoring and + analysis of anomalies. (Ioannis Koltsidas via dhruba) + + HADOOP-1480. Add counters to the C++ Pipes API. (acmurthy via omalley) + + HADOOP-3854. Add support for pluggable servlet filters in the HttpServers. + (Tsz Wo (Nicholas) Sze via omalley) + + HADOOP-3759. Provides ability to run memory intensive jobs without + affecting other running tasks on the nodes. (Hemanth Yamijala via ddas) + + HADOOP-3746. Add a fair share scheduler. (Matei Zaharia via omalley) + + HADOOP-3754. Add a thrift interface to access HDFS. (dhruba via omalley) + + HADOOP-3828. Provides a way to write skipped records to DFS. + (Sharad Agarwal via ddas) + + HADOOP-3948. Separate name-node edits and fsimage directories. + (Lohit Vijayarenu via shv) + + HADOOP-3939. Add an option to DistCp to delete files at the destination + not present at the source. (Tsz Wo (Nicholas) Sze via cdouglas) + + HADOOP-3601. Add a new contrib module for Hive, which is a sql-like + query processing tool that uses map/reduce. (Ashish Thusoo via omalley) + + HADOOP-3866. Added sort and multi-job updates in the JobTracker web ui. + (Craig Weisenfluh via omalley) + + HADOOP-3698. Add access control to control who is allowed to submit or + modify jobs in the JobTracker. (Hemanth Yamijala via omalley) + + HADOOP-1869. Support access times for HDFS files. (dhruba) + + HADOOP-3941. Extend FileSystem API to return file-checksums. + (szetszwo) + + HADOOP-3581. Prevents memory intensive user tasks from taking down + nodes. (Vinod K V via ddas) + + HADOOP-3970. Provides a way to recover counters written to JobHistory. + (Amar Kamat via ddas) + + HADOOP-3702. Adds ChainMapper and ChainReducer classes allow composing + chains of Maps and Reduces in a single Map/Reduce job, something like + MAP+ / REDUCE MAP*. (Alejandro Abdelnur via ddas) + + HADOOP-3445. Add capacity scheduler that provides guaranteed capacities to + queues as a percentage of the cluster. (Vivek Ratan via omalley) + + HADOOP-3992. Add a synthetic load generation facility to the test + directory. (hairong via szetszwo) + + HADOOP-3981. Implement a distributed file checksum algorithm in HDFS + and change DistCp to use file checksum for comparing src and dst files + (szetszwo) + + HADOOP-3829. Narrown down skipped records based on user acceptable value. + (Sharad Agarwal via ddas) + + HADOOP-3930. Add common interfaces for the pluggable schedulers and the + cli & gui clients. (Sreekanth Ramakrishnan via omalley) + + HADOOP-4176. Implement getFileChecksum(Path) in HftpFileSystem. (szetszwo) + + HADOOP-249. Reuse JVMs across Map-Reduce Tasks. + Configuration changes to hadoop-default.xml: + add mapred.job.reuse.jvm.num.tasks + (Devaraj Das via acmurthy) + + HADOOP-4070. Provide a mechanism in Hive for registering UDFs from the + query language. (tomwhite) + + HADOOP-2536. Implement a JDBC based database input and output formats to + allow Map-Reduce applications to work with databases. (Fredrik Hedberg and + Enis Soztutar via acmurthy) + + HADOOP-3019. A new library to support total order partitions. + (cdouglas via omalley) + + HADOOP-3924. Added a 'KILLED' job status. (Subramaniam Krishnan via + acmurthy) + + IMPROVEMENTS + + HADOOP-4205. hive: metastore and ql to use the refactored SerDe library. + (zshao) + + HADOOP-4106. libhdfs: add time, permission and user attribute support + (part 2). (Pete Wyckoff through zshao) + + HADOOP-4104. libhdfs: add time, permission and user attribute support. + (Pete Wyckoff through zshao) + + HADOOP-3908. libhdfs: better error message if llibhdfs.so doesn't exist. + (Pete Wyckoff through zshao) + + HADOOP-3732. Delay intialization of datanode block verification till + the verification thread is started. (rangadi) + + HADOOP-1627. Various small improvements to 'dfsadmin -report' output. + (rangadi) + + HADOOP-3577. Tools to inject blocks into name node and simulated + data nodes for testing. (Sanjay Radia via hairong) + + HADOOP-2664. Add a lzop compatible codec, so that files compressed by lzop + may be processed by map/reduce. (cdouglas via omalley) + + HADOOP-3655. Add additional ant properties to control junit. (Steve + Loughran via omalley) + + HADOOP-3543. Update the copyright year to 2008. (cdouglas via omalley) + + HADOOP-3587. Add a unit test for the contrib/data_join framework. + (cdouglas) + + HADOOP-3402. Add terasort example program (omalley) + + HADOOP-3660. Add replication factor for injecting blocks in simulated + datanodes. (Sanjay Radia via cdouglas) + + HADOOP-3684. Add a cloning function to the contrib/data_join framework + permitting users to define a more efficient method for cloning values from + the reduce than serialization/deserialization. (Runping Qi via cdouglas) + + HADOOP-3478. Improves the handling of map output fetching. Now the + randomization is by the hosts (and not the map outputs themselves). + (Jothi Padmanabhan via ddas) + + HADOOP-3617. Removed redundant checks of accounting space in MapTask and + makes the spill thread persistent so as to avoid creating a new one for + each spill. (Chris Douglas via acmurthy) + + HADOOP-3412. Factor the scheduler out of the JobTracker and make + it pluggable. (Tom White and Brice Arnould via omalley) + + HADOOP-3756. Minor. Remove unused dfs.client.buffer.dir from + hadoop-default.xml. (rangadi) + + HADOOP-3747. Adds counter suport for MultipleOutputs. + (Alejandro Abdelnur via ddas) + + HADOOP-3169. LeaseChecker daemon should not be started in DFSClient + constructor. (TszWo (Nicholas), SZE via hairong) + + HADOOP-3824. Move base functionality of StatusHttpServer to a core + package. (TszWo (Nicholas), SZE via cdouglas) + + HADOOP-3646. Add a bzip2 compatible codec, so bzip compressed data + may be processed by map/reduce. (Abdul Qadeer via cdouglas) + + HADOOP-3861. MapFile.Reader and Writer should implement Closeable. + (tomwhite via omalley) + + HADOOP-3791. Introduce generics into ReflectionUtils. (Chris Smith via + cdouglas) + + HADOOP-3694. Improve unit test performance by changing + MiniDFSCluster to listen only on 127.0.0.1. (cutting) + + HADOOP-3620. Namenode should synchronously resolve a datanode's network + location when the datanode registers. (hairong) + + HADOOP-3860. NNThroughputBenchmark is extended with rename and delete + benchmarks. (shv) + + HADOOP-3892. Include unix group name in JobConf. (Matei Zaharia via johan) + + HADOOP-3875. Change the time period between heartbeats to be relative to + the end of the heartbeat rpc, rather than the start. This causes better + behavior if the JobTracker is overloaded. (acmurthy via omalley) + + HADOOP-3853. Move multiple input format (HADOOP-372) extension to + library package. (tomwhite via johan) + + HADOOP-9. Use roulette scheduling for temporary space when the size + is not known. (Ari Rabkin via omalley) + + HADOOP-3202. Use recursive delete rather than FileUtil.fullyDelete. + (Amareshwari Sriramadasu via omalley) + + HADOOP-3368. Remove common-logging.properties from conf. (Steve Loughran + via omalley) + + HADOOP-3851. Fix spelling mistake in FSNamesystemMetrics. (Steve Loughran + via omalley) + + HADOOP-3780. Remove asynchronous resolution of network topology in the + JobTracker (Amar Kamat via omalley) + + HADOOP-3852. Add ShellCommandExecutor.toString method to make nicer + error messages. (Steve Loughran via omalley) + + HADOOP-3844. Include message of local exception in RPC client failures. + (Steve Loughran via omalley) + + HADOOP-3935. Split out inner classes from DataNode.java. (johan) + + HADOOP-3905. Create generic interfaces for edit log streams. (shv) + + HADOOP-3062. Add metrics to DataNode and TaskTracker to record network + traffic for HDFS reads/writes and MR shuffling. (cdouglas) + + HADOOP-3742. Remove HDFS from public java doc and add javadoc-dev for + generative javadoc for developers. (Sanjay Radia via omalley) + + HADOOP-3944. Improve documentation for public TupleWritable class in + join package. (Chris Douglas via enis) + + HADOOP-2330. Preallocate HDFS transaction log to improve performance. + (dhruba and hairong) + + HADOOP-3965. Convert DataBlockScanner into a package private class. (shv) + + HADOOP-3488. Prevent hadoop-daemon from rsync'ing log files (Stefan + Groshupf and Craig Macdonald via omalley) + + HADOOP-3342. Change the kill task actions to require http post instead of + get to prevent accidental crawls from triggering it. (enis via omalley) + + HADOOP-3937. Limit the job name in the job history filename to 50 + characters. (Matei Zaharia via omalley) + + HADOOP-3943. Remove unnecessary synchronization in + NetworkTopology.pseudoSortByDistance. (hairong via omalley) + + HADOOP-3498. File globbing alternation should be able to span path + components. (tomwhite) + + HADOOP-3361. Implement renames for NativeS3FileSystem. + (Albert Chern via tomwhite) + + HADOOP-3605. Make EC2 scripts show an error message if AWS_ACCOUNT_ID is + unset. (Al Hoang via tomwhite) + + HADOOP-4147. Remove unused class JobWithTaskContext from class + JobInProgress. (Amareshwari Sriramadasu via johan) + + HADOOP-4151. Add a byte-comparable interface that both Text and + BytesWritable implement. (cdouglas via omalley) + + HADOOP-4174. Move fs image/edit log methods from ClientProtocol to + NamenodeProtocol. (shv via szetszwo) + + HADOOP-4181. Include a .gitignore and saveVersion.sh change to support + developing under git. (omalley) + + HADOOP-4186. Factor LineReader out of LineRecordReader. (tomwhite via + omalley) + + HADOOP-4184. Break the module dependencies between core, hdfs, and + mapred. (tomwhite via omalley) + + HADOOP-4075. test-patch.sh now spits out ant commands that it runs. + (Ramya R via nigel) + + HADOOP-4117. Improve configurability of Hadoop EC2 instances. + (tomwhite) + + HADOOP-2411. Add support for larger CPU EC2 instance types. + (Chris K Wensel via tomwhite) + + HADOOP-4083. Changed the configuration attribute queue.name to + mapred.job.queue.name. (Hemanth Yamijala via acmurthy) + + HADOOP-4194. Added the JobConf and JobID to job-related methods in + JobTrackerInstrumentation for better metrics. (Mac Yang via acmurthy) + + HADOOP-3975. Change test-patch script to report working the dir + modifications preventing the suite from being run. (Ramya R via cdouglas) + + HADOOP-4124. Added a command-line switch to allow users to set job + priorities, also allow it to be manipulated via the web-ui. (Hemanth + Yamijala via acmurthy) + + HADOOP-2165. Augmented JobHistory to include the URIs to the tasks' + userlogs. (Vinod Kumar Vavilapalli via acmurthy) + + HADOOP-4062. Remove the synchronization on the output stream when a + connection is closed and also remove an undesirable exception when + a client is stoped while there is no pending RPC request. (hairong) + + HADOOP-4227. Remove the deprecated class org.apache.hadoop.fs.ShellCommand. + (szetszwo) + + HADOOP-4006. Clean up FSConstants and move some of the constants to + better places. (Sanjay Radia via rangadi) + + HADOOP-4279. Trace the seeds of random sequences in append unit tests to + make itermitant failures reproducible. (szetszwo via cdouglas) + + HADOOP-4209. Remove the change to the format of task attempt id by + incrementing the task attempt numbers by 1000 when the job restarts. + (Amar Kamat via omalley) + + HADOOP-4301. Adds forrest doc for the skip bad records feature. + (Sharad Agarwal via ddas) + + HADOOP-4354. Separate TestDatanodeDeath.testDatanodeDeath() into 4 tests. + (szetszwo) + + HADOOP-3790. Add more unit tests for testing HDFS file append. (szetszwo) + + HADOOP-4321. Include documentation for the capacity scheduler. (Hemanth + Yamijala via omalley) + + HADOOP-4424. Change menu layout for Hadoop documentation (Boris Shkolnik + via cdouglas). + + HADOOP-4438. Update forrest documentation to include missing FsShell + commands. (Suresh Srinivas via cdouglas) + + HADOOP-4105. Add forrest documentation for libhdfs. + (Pete Wyckoff via cutting) + + HADOOP-4510. Make getTaskOutputPath public. (Chris Wensel via omalley) + + OPTIMIZATIONS + + HADOOP-3556. Removed lock contention in MD5Hash by changing the + singleton MessageDigester by an instance per Thread using + ThreadLocal. (Iv?n de Prado via omalley) + + HADOOP-3328. When client is writing data to DFS, only the last + datanode in the pipeline needs to verify the checksum. Saves around + 30% CPU on intermediate datanodes. (rangadi) + + HADOOP-3863. Use a thread-local string encoder rather than a static one + that is protected by a lock. (acmurthy via omalley) + + HADOOP-3864. Prevent the JobTracker from locking up when a job is being + initialized. (acmurthy via omalley) + + HADOOP-3816. Faster directory listing in KFS. (Sriram Rao via omalley) + + HADOOP-2130. Pipes submit job should have both blocking and non-blocking + versions. (acmurthy via omalley) + + HADOOP-3769. Make the SampleMapper and SampleReducer from + GenericMRLoadGenerator public, so they can be used in other contexts. + (Lingyun Yang via omalley) + + HADOOP-3514. Inline the CRCs in intermediate files as opposed to reading + it from a different .crc file. (Jothi Padmanabhan via ddas) + + HADOOP-3638. Caches the iFile index files in memory to reduce seeks + (Jothi Padmanabhan via ddas) + + HADOOP-4225. FSEditLog.logOpenFile() should persist accessTime + rather than modificationTime. (shv) + + HADOOP-4380. Made several new classes (Child, JVMId, + JobTrackerInstrumentation, QueueManager, ResourceEstimator, + TaskTrackerInstrumentation, and TaskTrackerMetricsInst) in + org.apache.hadoop.mapred package private instead of public. (omalley) + + BUG FIXES + + HADOOP-3563. Refactor the distributed upgrade code so that it is + easier to identify datanode and namenode related code. (dhruba) + + HADOOP-3640. Fix the read method in the NativeS3InputStream. (tomwhite via + omalley) + + HADOOP-3711. Fixes the Streaming input parsing to properly find the + separator. (Amareshwari Sriramadasu via ddas) + + HADOOP-3725. Prevent TestMiniMRMapDebugScript from swallowing exceptions. + (Steve Loughran via cdouglas) + + HADOOP-3726. Throw exceptions from TestCLI setup and teardown instead of + swallowing them. (Steve Loughran via cdouglas) + + HADOOP-3721. Refactor CompositeRecordReader and related mapred.join classes + to make them clearer. (cdouglas) + + HADOOP-3720. Re-read the config file when dfsadmin -refreshNodes is invoked + so dfs.hosts and dfs.hosts.exclude are observed. (lohit vijayarenu via + cdouglas) + + HADOOP-3485. Allow writing to files over fuse. + (Pete Wyckoff via dhruba) + + HADOOP-3723. The flags to the libhdfs.create call can be treated as + a bitmask. (Pete Wyckoff via dhruba) + + HADOOP-3643. Filter out completed tasks when asking for running tasks in + the JobTracker web/ui. (Amar Kamat via omalley) + + HADOOP-3777. Ensure that Lzo compressors/decompressors correctly handle the + case where native libraries aren't available. (Chris Douglas via acmurthy) + + HADOOP-3728. Fix SleepJob so that it doesn't depend on temporary files, + this ensures we can now run more than one instance of SleepJob + simultaneously. (Chris Douglas via acmurthy) + + HADOOP-3795. Fix saving image files on Namenode with different checkpoint + stamps. (Lohit Vijayarenu via mahadev) + + HADOOP-3624. Improving createeditslog to create tree directory structure. + (Lohit Vijayarenu via mahadev) + + HADOOP-3778. DFSInputStream.seek() did not retry in case of some errors. + (LN via rangadi) + + HADOOP-3661. The handling of moving files deleted through fuse-dfs to + Trash made similar to the behaviour from dfs shell. + (Pete Wyckoff via dhruba) + + HADOOP-3819. Unset LANG and LC_CTYPE in saveVersion.sh to make it + compatible with non-English locales. (Rong-En Fan via cdouglas) + + HADOOP-3848. Cache calls to getSystemDir in the TaskTracker instead of + calling it for each task start. (acmurthy via omalley) + + HADOOP-3131. Fix reduce progress reporting for compressed intermediate + data. (Matei Zaharia via acmurthy) + + HADOOP-3796. fuse-dfs configuration is implemented as file system + mount options. (Pete Wyckoff via dhruba) + + HADOOP-3836. Fix TestMultipleOutputs to correctly clean up. (Alejandro + Abdelnur via acmurthy) + + HADOOP-3805. Improve fuse-dfs write performance. + (Pete Wyckoff via zshao) + + HADOOP-3846. Fix unit test CreateEditsLog to generate paths correctly. + (Lohit Vjayarenu via cdouglas) + + HADOOP-3904. Fix unit tests using the old dfs package name. + (TszWo (Nicholas), SZE via johan) + + HADOOP-3319. Fix some HOD error messages to go stderr instead of + stdout. (Vinod Kumar Vavilapalli via omalley) + + HADOOP-3907. Move INodeDirectoryWithQuota to its own .java file. + (Tsz Wo (Nicholas), SZE via hairong) + + HADOOP-3919. Fix attribute name in hadoop-default for + mapred.jobtracker.instrumentation. (Ari Rabkin via omalley) + + HADOOP-3903. Change the package name for the servlets to be hdfs instead of + dfs. (Tsz Wo (Nicholas) Sze via omalley) + + HADOOP-3773. Change Pipes to set the default map output key and value + types correctly. (Koji Noguchi via omalley) + + HADOOP-3952. Fix compilation error in TestDataJoin referencing dfs package. + (omalley) + + HADOOP-3951. Fix package name for FSNamesystem logs and modify other + hard-coded Logs to use the class name. (cdouglas) + + HADOOP-3889. Improve error reporting from HftpFileSystem, handling in + DistCp. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3946. Fix TestMapRed after hadoop-3664. (tomwhite via omalley) + + HADOOP-3949. Remove duplicate jars from Chukwa. (Jerome Boulon via omalley) + + HADOOP-3933. DataNode sometimes sends up to io.byte.per.checksum bytes + more than required to client. (Ning Li via rangadi) + + HADOOP-3962. Shell command "fs -count" should support paths with different + file systems. (Tsz Wo (Nicholas), SZE via mahadev) + + HADOOP-3957. Fix javac warnings in DistCp and TestCopyFiles. (Tsz Wo + (Nicholas), SZE via cdouglas) + + HADOOP-3958. Fix TestMapRed to check the success of test-job. (omalley via + acmurthy) + + HADOOP-3985. Fix TestHDFSServerPorts to use random ports. (Hairong Kuang + via omalley) + + HADOOP-3964. Fix javadoc warnings introduced by FailMon. (dhruba) + + HADOOP-3785. Fix FileSystem cache to be case-insensitive for scheme and + authority. (Bill de hOra via cdouglas) + + HADOOP-3506. Fix a rare NPE caused by error handling in S3. (Tom White via + cdouglas) + + HADOOP-3705. Fix mapred.join parser to accept InputFormats named with + underscore and static, inner classes. (cdouglas) + + HADOOP-4023. Fix javadoc warnings introduced when the HDFS javadoc was + made private. (omalley) + + HADOOP-4030. Remove lzop from the default list of codecs. (Arun Murthy via + cdouglas) + + HADOOP-3961. Fix task disk space requirement estimates for virtual + input jobs. Delays limiting task placement until after 10% of the maps + have finished. (Ari Rabkin via omalley) + + HADOOP-2168. Fix problem with C++ record reader's progress not being + reported to framework. (acmurthy via omalley) + + HADOOP-3966. Copy findbugs generated output files to PATCH_DIR while + running test-patch. (Ramya R via lohit) + + HADOOP-4037. Fix the eclipse plugin for versions of kfs and log4j. (nigel + via omalley) + + HADOOP-3950. Cause the Mini MR cluster to wait for task trackers to + register before continuing. (enis via omalley) + + HADOOP-3910. Remove unused ClusterTestDFSNamespaceLogging and + ClusterTestDFS. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3954. Disable record skipping by default. (Sharad Agarwal via + cdouglas) + + HADOOP-4050. Fix TestFairScheduler to use absolute paths for the work + directory. (Matei Zaharia via omalley) + + HADOOP-4069. Keep temporary test files from TestKosmosFileSystem under + test.build.data instead of /tmp. (lohit via omalley) + + HADOOP-4078. Create test files for TestKosmosFileSystem in separate + directory under test.build.data. (lohit) + + HADOOP-3968. Fix getFileBlockLocations calls to use FileStatus instead + of Path reflecting the new API. (Pete Wyckoff via lohit) + + HADOOP-3963. libhdfs does not exit on its own, instead it returns error + to the caller and behaves as a true library. (Pete Wyckoff via dhruba) + + HADOOP-4100. Removes the cleanupTask scheduling from the Scheduler + implementations and moves it to the JobTracker. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4097. Make hive work well with speculative execution turned on. + (Joydeep Sen Sarma via dhruba) + + HADOOP-4113. Changes to libhdfs to not exit on its own, rather return + an error code to the caller. (Pete Wyckoff via dhruba) + + HADOOP-4054. Remove duplicate lease removal during edit log loading. + (hairong) + + HADOOP-4071. FSNameSystem.isReplicationInProgress should add an + underReplicated block to the neededReplication queue using method + "add" not "update". (hairong) + + HADOOP-4154. Fix type warnings in WritableUtils. (szetszwo via omalley) + + HADOOP-4133. Log files generated by Hive should reside in the + build directory. (Prasad Chakka via dhruba) + + HADOOP-4094. Hive now has hive-default.xml and hive-site.xml similar + to core hadoop. (Prasad Chakka via dhruba) + + HADOOP-4112. Handles cleanupTask in JobHistory + (Amareshwari Sriramadasu via ddas) + + HADOOP-3831. Very slow reading clients sometimes failed while reading. + (rangadi) + + HADOOP-4155. Use JobTracker's start time while initializing JobHistory's + JobTracker Unique String. (lohit) + + HADOOP-4099. Fix null pointer when using HFTP from an 0.18 server. + (dhruba via omalley) + + HADOOP-3570. Includes user specified libjar files in the client side + classpath path. (Sharad Agarwal via ddas) + + HADOOP-4129. Changed memory limits of TaskTracker and Tasks to be in + KiloBytes rather than bytes. (Vinod Kumar Vavilapalli via acmurthy) + + HADOOP-4139. Optimize Hive multi group-by. + (Namin Jain via dhruba) + + HADOOP-3911. Add a check to fsck options to make sure -files is not + the first option to resolve conflicts with GenericOptionsParser + (lohit) + + HADOOP-3623. Refactor LeaseManager. (szetszwo) + + HADOOP-4125. Handles Reduce cleanup tip on the web ui. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4087. Hive Metastore API for php and python clients. + (Prasad Chakka via dhruba) + + HADOOP-4197. Update DATA_TRANSFER_VERSION for HADOOP-3981. (szetszwo) + + HADOOP-4138. Refactor the Hive SerDe library to better structure + the interfaces to the serializer and de-serializer. + (Zheng Shao via dhruba) + + HADOOP-4195. Close compressor before returning to codec pool. + (acmurthy via omalley) + + HADOOP-2403. Escapes some special characters before logging to + history files. (Amareshwari Sriramadasu via ddas) + + HADOOP-4200. Fix a bug in the test-patch.sh script. + (Ramya R via nigel) + + HADOOP-4084. Add explain plan capabilities to Hive Query Language. + (Ashish Thusoo via dhruba) + + HADOOP-4121. Preserve cause for exception if the initialization of + HistoryViewer for JobHistory fails. (Amareshwari Sri Ramadasu via + acmurthy) + + HADOOP-4213. Fixes NPE in TestLimitTasksPerJobTaskScheduler. + (Sreekanth Ramakrishnan via ddas) + + HADOOP-4077. Setting access and modification time for a file + requires write permissions on the file. (dhruba) + + HADOOP-3592. Fix a couple of possible file leaks in FileUtil + (Bill de hOra via rangadi) + + HADOOP-4120. Hive interactive shell records the time taken by a + query. (Raghotham Murthy via dhruba) + + HADOOP-4090. The hive scripts pick up hadoop from HADOOP_HOME + and then the path. (Raghotham Murthy via dhruba) + + HADOOP-4242. Remove extra ";" in FSDirectory that blocks compilation + in some IDE's. (szetszwo via omalley) + + HADOOP-4249. Fix eclipse path to include the hsqldb.jar. (szetszwo via + omalley) + + HADOOP-4247. Move InputSampler into org.apache.hadoop.mapred.lib, so that + examples.jar doesn't depend on tools.jar. (omalley) + + HADOOP-4269. Fix the deprecation of LineReader by extending the new class + into the old name and deprecating it. Also update the tests to test the + new class. (cdouglas via omalley) + + HADOOP-4280. Fix conversions between seconds in C and milliseconds in + Java for access times for files. (Pete Wyckoff via rangadi) + + HADOOP-4254. -setSpaceQuota command does not convert "TB" extenstion to + terabytes properly. Implementation now uses StringUtils for parsing this. + (Raghu Angadi) + + HADOOP-4259. Findbugs should run over tools.jar also. (cdouglas via + omalley) + + HADOOP-4275. Move public method isJobValidName from JobID to a private + method in JobTracker. (omalley) + + HADOOP-4173. fix failures in TestProcfsBasedProcessTree and + TestTaskTrackerMemoryManager tests. ProcfsBasedProcessTree and + memory management in TaskTracker are disabled on Windows. + (Vinod K V via rangadi) + + HADOOP-4189. Fixes the history blocksize & intertracker protocol version + issues introduced as part of HADOOP-3245. (Amar Kamat via ddas) + + HADOOP-4190. Fixes the backward compatibility issue with Job History. + introduced by HADOOP-3245 and HADOOP-2403. (Amar Kamat via ddas) + + HADOOP-4237. Fixes the TestStreamingBadRecords.testNarrowDown testcase. + (Sharad Agarwal via ddas) + + HADOOP-4274. Capacity scheduler accidently modifies the underlying + data structures when browing the job lists. (Hemanth Yamijala via omalley) + + HADOOP-4309. Fix eclipse-plugin compilation. (cdouglas) + + HADOOP-4232. Fix race condition in JVM reuse when multiple slots become + free. (ddas via acmurthy) + + HADOOP-4302. Fix a race condition in TestReduceFetch that can yield false + negatvies. (cdouglas) + + HADOOP-3942. Update distcp documentation to include features introduced in + HADOOP-3873, HADOOP-3939. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-4319. fuse-dfs dfs_read function returns as many bytes as it is + told to read unlesss end-of-file is reached. (Pete Wyckoff via dhruba) + + HADOOP-4246. Ensure we have the correct lower bound on the number of + retries for fetching map-outputs; also fixed the case where the reducer + automatically kills on too many unique map-outputs could not be fetched + for small jobs. (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-4163. Report FSErrors from map output fetch threads instead of + merely logging them. (Sharad Agarwal via cdouglas) + + HADOOP-4261. Adds a setup task for jobs. This is required so that we + don't setup jobs that haven't been inited yet (since init could lead + to job failure). Only after the init has successfully happened do we + launch the setupJob task. (Amareshwari Sriramadasu via ddas) + + HADOOP-4256. Removes Completed and Failed Job tables from + jobqueue_details.jsp. (Sreekanth Ramakrishnan via ddas) + + HADOOP-4267. Occasional exceptions during shutting down HSQLDB is logged + but not rethrown. (enis) + + HADOOP-4018. The number of tasks for a single job cannot exceed a + pre-configured maximum value. (dhruba) + + HADOOP-4288. Fixes a NPE problem in CapacityScheduler. + (Amar Kamat via ddas) + + HADOOP-4014. Create hard links with 'fsutil hardlink' on Windows. (shv) + + HADOOP-4393. Merged org.apache.hadoop.fs.permission.AccessControlException + and org.apache.hadoop.security.AccessControlIOException into a single + class hadoop.security.AccessControlException. (omalley via acmurthy) + + HADOOP-4287. Fixes an issue to do with maintaining counts of running/pending + maps/reduces. (Sreekanth Ramakrishnan via ddas) + + HADOOP-4361. Makes sure that jobs killed from command line are killed + fast (i.e., there is a slot to run the cleanup task soon). + (Amareshwari Sriramadasu via ddas) + + HADOOP-4400. Add "hdfs://" to fs.default.name on quickstart.html. + (Jeff Hammerbacher via omalley) + + HADOOP-4378. Fix TestJobQueueInformation to use SleepJob rather than + WordCount via TestMiniMRWithDFS. (Sreekanth Ramakrishnan via acmurthy) + + HADOOP-4376. Fix formatting in hadoop-default.xml for + hadoop.http.filter.initializers. (Enis Soztutar via acmurthy) + + HADOOP-4410. Adds an extra arg to the API FileUtil.makeShellPath to + determine whether to canonicalize file paths or not. + (Amareshwari Sriramadasu via ddas) + + HADOOP-4236. Ensure un-initialized jobs are killed correctly on + user-demand. (Sharad Agarwal via acmurthy) + + HADOOP-4373. Fix calculation of Guaranteed Capacity for the + capacity-scheduler. (Hemanth Yamijala via acmurthy) + + HADOOP-4053. Schedulers must be notified when jobs complete. (Amar Kamat via omalley) + + HADOOP-4335. Fix FsShell -ls for filesystems without owners/groups. (David + Phillips via cdouglas) + + HADOOP-4426. TestCapacityScheduler broke due to the two commits HADOOP-4053 + and HADOOP-4373. This patch fixes that. (Hemanth Yamijala via ddas) + + HADOOP-4418. Updates documentation in forrest for Mapred, streaming and pipes. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3155. Ensure that there is only one thread fetching + TaskCompletionEvents on TaskTracker re-init. (Dhruba Borthakur via + acmurthy) + + HADOOP-4425. Fix EditLogInputStream to overload the bulk read method. + (cdouglas) + + HADOOP-4427. Adds the new queue/job commands to the manual. + (Sreekanth Ramakrishnan via ddas) + + HADOOP-4278. Increase debug logging for unit test TestDatanodeDeath. + Fix the case when primary is dead. (dhruba via szetszwo) + + HADOOP-4423. Keep block length when the block recovery is triggered by + append. (szetszwo) + + HADOOP-4449. Fix dfsadmin usage. (Raghu Angadi via cdouglas) + + HADOOP-4455. Added TestSerDe so that unit tests can run successfully. + (Ashish Thusoo via dhruba) + + HADOOP-4457. Fixes an input split logging problem introduced by + HADOOP-3245. (Amareshwari Sriramadasu via ddas) + + HADOOP-4464. Separate out TestFileCreationClient from TestFileCreation. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-4404. saveFSImage() removes files from a storage directory that do + not correspond to its type. (shv) + + HADOOP-4149. Fix handling of updates to the job priority, by changing the + list of jobs to be keyed by the priority, submit time, and job tracker id. + (Amar Kamat via omalley) + + HADOOP-4296. Fix job client failures by not retiring a job as soon as it + is finished. (dhruba) + + HADOOP-4439. Remove configuration variables that aren't usable yet, in + particular mapred.tasktracker.tasks.maxmemory and mapred.task.max.memory. + (Hemanth Yamijala via omalley) + + HADOOP-4230. Fix for serde2 interface, limit operator, select * operator, + UDF trim functions and sampling. (Ashish Thusoo via dhruba) + + HADOOP-4358. No need to truncate access time in INode. Also fixes NPE + in CreateEditsLog. (Raghu Angadi) + + HADOOP-4387. TestHDFSFileSystemContract fails on windows nightly builds. + (Raghu Angadi) + + HADOOP-4466. Ensure that SequenceFileOutputFormat isn't tied to Writables + and can be used with other Serialization frameworks. (Chris Wensel via + acmurthy) + + HADOOP-4525. Fix ipc.server.ipcnodelay originally missed in in HADOOP-2232. + (cdouglas via Clint Morgan) + + HADOOP-4498. Ensure that JobHistory correctly escapes the job name so that + regex patterns work. (Chris Wensel via acmurthy) + + HADOOP-4446. Modify guaranteed capacity labels in capacity scheduler's UI + to reflect the information being displayed. (Sreekanth Ramakrishnan via + yhemanth) + + HADOOP-4282. Some user facing URLs are not filtered by user filters. + (szetszwo) + + HADOOP-4595. Fixes two race conditions - one to do with updating free slot count, + and another to do with starting the MapEventsFetcher thread. (ddas) + + HADOOP-4552. Fix a deadlock in RPC server. (Raghu Angadi) + + HADOOP-4471. Sort running jobs by priority in the capacity scheduler. + (Amar Kamat via yhemanth) + + HADOOP-4500. Fix MultiFileSplit to get the FileSystem from the relevant + path rather than the JobClient. (Joydeep Sen Sarma via cdouglas) + +Release 0.18.4 - Unreleased + + BUG FIXES + + HADOOP-5114. Remove timeout for accept() in DataNode. This makes accept() + fail in JDK on Windows and causes many tests to fail. (Raghu Angadi) + + HADOOP-5192. Block receiver should not remove a block that's created or + being written by other threads. (hairong) + + HADOOP-5134. FSNamesystem#commitBlockSynchronization adds under-construction + block locations to blocksMap. (Dhruba Borthakur via hairong) + + HADOOP-5412. Simulated DataNode should not write to a block that's being + written by another thread. (hairong) + + HADOOP-5465. Fix the problem of blocks remaining under-replicated by + providing synchronized modification to the counter xmitsInProgress in + DataNode. (hairong) + + HADOOP-5557. Fixes some minor problems in TestOverReplicatedBlocks. + (szetszwo) + + HADOOP-5644. Namenode is stuck in safe mode. (suresh Srinivas via hairong) + +Release 0.18.3 - 2009-01-27 + + IMPROVEMENTS + + HADOOP-4150. Include librecordio in hadoop releases. (Giridharan Kesavan + via acmurthy) + + HADOOP-4668. Improve documentation for setCombinerClass to clarify the + restrictions on combiners. (omalley) + + BUG FIXES + + HADOOP-4499. DFSClient should invoke checksumOk only once. (Raghu Angadi) + + HADOOP-4597. Calculate mis-replicated blocks when safe-mode is turned + off manually. (shv) + + HADOOP-3121. lsr should keep listing the remaining items but not + terminate if there is any IOException. (szetszwo) + + HADOOP-4610. Always calculate mis-replicated blocks when safe-mode is + turned off. (shv) + + HADOOP-3883. Limit namenode to assign at most one generation stamp for + a particular block within a short period. (szetszwo) + + HADOOP-4556. Block went missing. (hairong) + + HADOOP-4643. NameNode should exclude excessive replicas when counting + live replicas for a block. (hairong) + + HADOOP-4703. Should not wait for proxy forever in lease recovering. + (szetszwo) + + HADOOP-4647. NamenodeFsck should close the DFSClient it has created. + (szetszwo) + + HADOOP-4616. Fuse-dfs can handle bad values from FileSystem.read call. + (Pete Wyckoff via dhruba) + + HADOOP-4061. Throttle Datanode decommission monitoring in Namenode. + (szetszwo) + + HADOOP-4659. Root cause of connection failure is being lost to code that + uses it for delaying startup. (Steve Loughran and Hairong via hairong) + + HADOOP-4614. Lazily open segments when merging map spills to avoid using + too many file descriptors. (Yuri Pradkin via cdouglas) + + HADOOP-4257. The DFS client should pick only one datanode as the candidate + to initiate lease recovery. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-4713. Fix librecordio to handle records larger than 64k. (Christian + Kunz via cdouglas) + + HADOOP-4635. Fix a memory leak in fuse dfs. (pete wyckoff via mahadev) + + HADOOP-4714. Report status between merges and make the number of records + between progress reports configurable. (Jothi Padmanabhan via cdouglas) + + HADOOP-4726. Fix documentation typos "the the". (Edward J. Yoon via + szetszwo) + + HADOOP-4679. Datanode prints tons of log messages: waiting for threadgroup + to exit, active threads is XX. (hairong) + + HADOOP-4746. Job output directory should be normalized. (hairong) + + HADOOP-4717. Removal of default port# in NameNode.getUri() causes a + map/reduce job failed to prompt temporary output. (hairong) + + HADOOP-4778. Check for zero size block meta file when updating a block. + (szetszwo) + + HADOOP-4742. Replica gets deleted by mistake. (Wang Xu via hairong) + + HADOOP-4702. Failed block replication leaves an incomplete block in + receiver's tmp data directory. (hairong) + + HADOOP-4613. Fix block browsing on Web UI. (Johan Oskarsson via shv) + + HADOOP-4806. HDFS rename should not use src path as a regular expression. + (szetszwo) + + HADOOP-4795. Prevent lease monitor getting into an infinite loop when + leases and the namespace tree does not match. (szetszwo) + + HADOOP-4620. Fixes Streaming to handle well the cases of map/reduce with empty + input/output. (Ravi Gummadi via ddas) + + HADOOP-4857. Fixes TestUlimit to have exactly 1 map in the jobs spawned. + (Ravi Gummadi via ddas) + + HADOOP-4810. Data lost at cluster startup time. (hairong) + + HADOOP-4797. Improve how RPC server reads and writes large buffers. Avoids + soft-leak of direct buffers and excess copies in NIO layer. (Raghu Angadi) + + HADOOP-4840. TestNodeCount sometimes fails with NullPointerException. + (hairong) + + HADOOP-4904. Fix deadlock while leaving safe mode. (shv) + + HADOOP-1980. 'dfsadmin -safemode enter' should prevent the namenode from + leaving safemode automatically. (shv & Raghu Angadi) + + HADOOP-4951. Lease monitor should acquire the LeaseManager lock but not the + Monitor lock. (szetszwo) + + HADOOP-4935. processMisReplicatedBlocks() should not clear + excessReplicateMap. (shv) + + HADOOP-4961. Fix ConcurrentModificationException in lease recovery + of empty files. (shv) + + HADOOP-4971. A long (unexpected) delay at datanodes could make subsequent + block reports from many datanode at the same time. (Raghu Angadi) + + HADOOP-4910. NameNode should exclude replicas when choosing excessive + replicas to delete to avoid data lose. (hairong) + + HADOOP-4983. Fixes a problem in updating Counters in the status reporting. + (Amareshwari Sriramadasu via ddas) + +Release 0.18.2 - 2008-11-03 + + BUG FIXES + + HADOOP-3614. Fix a bug that Datanode may use an old GenerationStamp to get + meta file. (szetszwo) + + HADOOP-4314. Simulated datanodes should not include blocks that are still + being written in their block report. (Raghu Angadi) + + HADOOP-4228. dfs datanode metrics, bytes_read and bytes_written, overflow + due to incorrect type used. (hairong) + + HADOOP-4395. The FSEditLog loading is incorrect for the case OP_SET_OWNER. + (szetszwo) + + HADOOP-4351. FSNamesystem.getBlockLocationsInternal throws + ArrayIndexOutOfBoundsException. (hairong) + + HADOOP-4403. Make TestLeaseRecovery and TestFileCreation more robust. + (szetszwo) + + HADOOP-4292. Do not support append() for LocalFileSystem. (hairong) + + HADOOP-4399. Make fuse-dfs multi-thread access safe. + (Pete Wyckoff via dhruba) + + HADOOP-4369. Use setMetric(...) instead of incrMetric(...) for metrics + averages. (Brian Bockelman via szetszwo) + + HADOOP-4469. Rename and add the ant task jar file to the tar file. (nigel) + + HADOOP-3914. DFSClient sends Checksum Ok only once for a block. + (Christian Kunz via hairong) + + HADOOP-4467. SerializationFactory now uses the current context ClassLoader + allowing for user supplied Serialization instances. (Chris Wensel via + acmurthy) + + HADOOP-4517. Release FSDataset lock before joining ongoing create threads. + (szetszwo) + + HADOOP-4526. fsck failing with NullPointerException. (hairong) + + HADOOP-4483 Honor the max parameter in DatanodeDescriptor.getBlockArray(..) + (Ahad Rana and Hairong Kuang via szetszwo) + + HADOOP-4340. Correctly set the exit code from JobShell.main so that the + 'hadoop jar' command returns the right code to the user. (acmurthy) + + NEW FEATURES + + HADOOP-2421. Add jdiff output to documentation, listing all API + changes from the prior release. (cutting) + +Release 0.18.1 - 2008-09-17 + + IMPROVEMENTS + + HADOOP-3934. Upgrade log4j to 1.2.15. (omalley) + + BUG FIXES + + HADOOP-3995. In case of quota failure on HDFS, rename does not restore + source filename. (rangadi) + + HADOOP-3821. Prevent SequenceFile and IFile from duplicating codecs in + CodecPool when closed more than once. (Arun Murthy via cdouglas) + + HADOOP-4040. Remove coded default of the IPC idle connection timeout + from the TaskTracker, which was causing HDFS client connections to not be + collected. (ddas via omalley) + + HADOOP-4046. Made WritableComparable's constructor protected instead of + private to re-enable class derivation. (cdouglas via omalley) + + HADOOP-3940. Fix in-memory merge condition to wait when there are no map + outputs or when the final map outputs are being fetched without contention. + (cdouglas) + +Release 0.18.0 - 2008-08-19 + + INCOMPATIBLE CHANGES + + HADOOP-2703. The default options to fsck skips checking files + that are being written to. The output of fsck is incompatible + with previous release. (lohit vijayarenu via dhruba) + + HADOOP-2865. FsShell.ls() printout format changed to print file names + in the end of the line. (Edward J. Yoon via shv) + + HADOOP-3283. The Datanode has a RPC server. It currently supports + two RPCs: the first RPC retrives the metadata about a block and the + second RPC sets the generation stamp of an existing block. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2797. Code related to upgrading to 0.14 (Block CRCs) is + removed. As result, upgrade to 0.18 or later from 0.13 or earlier + is not supported. If upgrading from 0.13 or earlier is required, + please upgrade to an intermediate version (0.14-0.17) and then + to this version. (rangadi) + + HADOOP-544. This issue introduces new classes JobID, TaskID and + TaskAttemptID, which should be used instead of their string counterparts. + Functions in JobClient, TaskReport, RunningJob, jobcontrol.Job and + TaskCompletionEvent that use string arguments are deprecated in favor + of the corresponding ones that use ID objects. Applications can use + xxxID.toString() and xxxID.forName() methods to convert/restore objects + to/from strings. (Enis Soztutar via ddas) + + HADOOP-2188. RPC client sends a ping rather than throw timeouts. + RPC server does not throw away old RPCs. If clients and the server are on + different versions, they are not able to function well. In addition, + The property ipc.client.timeout is removed from the default hadoop + configuration. It also removes metrics RpcOpsDiscardedOPsNum. (hairong) + + HADOOP-2181. This issue adds logging for input splits in Jobtracker log + and jobHistory log. Also adds web UI for viewing input splits in job UI + and history UI. (Amareshwari Sriramadasu via ddas) + + HADOOP-3226. Run combiners multiple times over map outputs as they + are merged in both the map and the reduce tasks. (cdouglas via omalley) + + HADOOP-3329. DatanodeDescriptor objects should not be stored in the + fsimage. (dhruba) + + HADOOP-2656. The Block object has a generation stamp inside it. + Existing blocks get a generation stamp of 0. This is needed to support + appends. (dhruba) + + HADOOP-3390. Removed deprecated ClientProtocol.abandonFileInProgress(). + (Tsz Wo (Nicholas), SZE via rangadi) + + HADOOP-3405. Made some map/reduce internal classes non-public: + MapTaskStatus, ReduceTaskStatus, JobSubmissionProtocol, + CompletedJobStatusStore. (enis via omaley) + + HADOOP-3265. Removed depcrecated API getFileCacheHints(). + (Lohit Vijayarenu via rangadi) + + HADOOP-3310. The namenode instructs the primary datanode to do lease + recovery. The block gets a new generation stamp. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2909. Improve IPC idle connection management. Property + ipc.client.maxidletime is removed from the default configuration, + instead it is defined as twice of the ipc.client.connection.maxidletime. + A connection with outstanding requests won't be treated as idle. + (hairong) + + HADOOP-3459. Change in the output format of dfs -ls to more closely match + /bin/ls. New format is: perm repl owner group size date name + (Mukund Madhugiri via omally) + + HADOOP-3113. An fsync invoked on a HDFS file really really + persists data! The datanode moves blocks in the tmp directory to + the real block directory on a datanode-restart. (dhruba) + + HADOOP-3452. Change fsck to return non-zero status for a corrupt + FileSystem. (lohit vijayarenu via cdouglas) + + HADOOP-3193. Include the address of the client that found the corrupted + block in the log. Also include a CorruptedBlocks metric to track the size + of the corrupted block map. (cdouglas) + + HADOOP-3512. Separate out the tools into a tools jar. (omalley) + + HADOOP-3598. Ensure that temporary task-output directories are not created + if they are not necessary e.g. for Maps with no side-effect files. + (acmurthy) + + HADOOP-3665. Modify WritableComparator so that it only creates instances + of the keytype if the type does not define a WritableComparator. Calling + the superclass compare will throw a NullPointerException. Also define + a RawComparator for NullWritable and permit it to be written as a key + to SequenceFiles. (cdouglas) + + HADOOP-3673. Avoid deadlock caused by DataNode RPC receoverBlock(). + (Tsz Wo (Nicholas), SZE via rangadi) + + NEW FEATURES + + HADOOP-3074. Provides a UrlStreamHandler for DFS and other FS, + relying on FileSystem (taton) + + HADOOP-2585. Name-node imports namespace data from a recent checkpoint + accessible via a NFS mount. (shv) + + HADOOP-3061. Writable types for doubles and bytes. (Andrzej + Bialecki via omalley) + + HADOOP-2857. Allow libhdfs to set jvm options. (Craig Macdonald + via omalley) + + HADOOP-3317. Add default port for HDFS namenode. The port in + "hdfs:" URIs now defaults to 8020, so that one may simply use URIs + of the form "hdfs://example.com/dir/file". (cutting) + + HADOOP-2019. Adds support for .tar, .tgz and .tar.gz files in + DistributedCache (Amareshwari Sriramadasu via ddas) + + HADOOP-3058. Add FSNamesystem status metrics. + (Lohit Vjayarenu via rangadi) + + HADOOP-1915. Allow users to specify counters via strings instead + of enumerations. (tomwhite via omalley) + + HADOOP-2065. Delay invalidating corrupt replicas of block until its + is removed from under replicated state. If all replicas are found to + be corrupt, retain all copies and mark the block as corrupt. + (Lohit Vjayarenu via rangadi) + + HADOOP-3221. Adds org.apache.hadoop.mapred.lib.NLineInputFormat, which + splits files into splits each of N lines. N can be specified by + configuration property "mapred.line.input.format.linespermap", which + defaults to 1. (Amareshwari Sriramadasu via ddas) + + HADOOP-3336. Direct a subset of annotated FSNamesystem calls for audit + logging. (cdouglas) + + HADOOP-3400. A new API FileSystem.deleteOnExit() that facilitates + handling of temporary files in HDFS. (dhruba) + + HADOOP-4. Add fuse-dfs to contrib, permitting one to mount an + HDFS filesystem on systems that support FUSE, e.g., Linux. + (Pete Wyckoff via cutting) + + HADOOP-3246. Add FTPFileSystem. (Ankur Goel via cutting) + + HADOOP-3250. Extend FileSystem API to allow appending to files. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3177. Implement Syncable interface for FileSystem. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-1328. Implement user counters in streaming. (tomwhite via + omalley) + + HADOOP-3187. Quotas for namespace management. (Hairong Kuang via ddas) + + HADOOP-3307. Support for Archives in Hadoop. (Mahadev Konar via ddas) + + HADOOP-3460. Add SequenceFileAsBinaryOutputFormat to permit direct + writes of serialized data. (Koji Noguchi via cdouglas) + + HADOOP-3230. Add ability to get counter values from command + line. (tomwhite via omalley) + + HADOOP-930. Add support for native S3 files. (tomwhite via cutting) + + HADOOP-3502. Quota API needs documentation in Forrest. (hairong) + + HADOOP-3413. Allow SequenceFile.Reader to use serialization + framework. (tomwhite via omalley) + + HADOOP-3541. Import of the namespace from a checkpoint documented + in hadoop user guide. (shv) + + IMPROVEMENTS + + HADOOP-3677. Simplify generation stamp upgrade by making is a + local upgrade on datandodes. Deleted distributed upgrade. + (rangadi) + + HADOOP-2928. Remove deprecated FileSystem.getContentLength(). + (Lohit Vijayarenu via rangadi) + + HADOOP-3130. Make the connect timeout smaller for getFile. + (Amar Ramesh Kamat via ddas) + + HADOOP-3160. Remove deprecated exists() from ClientProtocol and + FSNamesystem (Lohit Vjayarenu via rangadi) + + HADOOP-2910. Throttle IPC Clients during bursts of requests or + server slowdown. Clients retry connection for up to 15 minutes + when socket connection times out. (hairong) + + HADOOP-3295. Allow TextOutputFormat to use configurable spearators. + (Zheng Shao via cdouglas). + + HADOOP-3308. Improve QuickSort by excluding values eq the pivot from the + partition. (cdouglas) + + HADOOP-2461. Trim property names in configuration. + (Tsz Wo (Nicholas), SZE via shv) + + HADOOP-2799. Deprecate o.a.h.io.Closable in favor of java.io.Closable. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3345. Enhance the hudson-test-patch target to cleanup messages, + fix minor defects, and add eclipse plugin and python unit tests. (nigel) + + HADOOP-3144. Improve robustness of LineRecordReader by defining a maximum + line length (mapred.linerecordreader.maxlength), thereby avoiding reading + too far into the following split. (Zheng Shao via cdouglas) + + HADOOP-3334. Move lease handling from FSNamesystem into a seperate class. + (Tsz Wo (Nicholas), SZE via rangadi) + + HADOOP-3332. Reduces the amount of logging in Reducer's shuffle phase. + (Devaraj Das) + + HADOOP-3355. Enhances Configuration class to accept hex numbers for getInt + and getLong. (Amareshwari Sriramadasu via ddas) + + HADOOP-3350. Add an argument to distcp to permit the user to limit the + number of maps. (cdouglas) + + HADOOP-3013. Add corrupt block reporting to fsck. + (lohit vijayarenu via cdouglas) + + HADOOP-3377. Remove TaskRunner::replaceAll and replace with equivalent + String::replace. (Brice Arnould via cdouglas) + + HADOOP-3398. Minor improvement to a utility function in that participates + in backoff calculation. (cdouglas) + + HADOOP-3381. Clear referenced when directories are deleted so that + effect of memory leaks are not multiplied. (rangadi) + + HADOOP-2867. Adds the task's CWD to its LD_LIBRARY_PATH. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3232. DU class runs the 'du' command in a seperate thread so + that it does not block user. DataNode misses heartbeats in large + nodes otherwise. (Johan Oskarsson via rangadi) + + HADOOP-3035. During block transfers between datanodes, the receiving + datanode, now can report corrupt replicas received from src node to + the namenode. (Lohit Vijayarenu via rangadi) + + HADOOP-3434. Retain the cause of the bind failure in Server::bind. + (Steve Loughran via cdouglas) + + HADOOP-3429. Increases the size of the buffers used for the communication + for Streaming jobs. (Amareshwari Sriramadasu via ddas) + + HADOOP-3486. Change default for initial block report to 0 seconds + and document it. (Sanjay Radia via omalley) + + HADOOP-3448. Improve the text in the assertion making sure the + layout versions are consistent in the data node. (Steve Loughran + via omalley) + + HADOOP-2095. Improve the Map-Reduce shuffle/merge by cutting down + buffer-copies; changed intermediate sort/merge to use the new IFile format + rather than SequenceFiles and compression of map-outputs is now + implemented by compressing the entire file rather than SequenceFile + compression. Shuffle also has been changed to use a simple byte-buffer + manager rather than the InMemoryFileSystem. + Configuration changes to hadoop-default.xml: + deprecated mapred.map.output.compression.type + (acmurthy) + + HADOOP-236. JobTacker now refuses connection from a task tracker with a + different version number. (Sharad Agarwal via ddas) + + HADOOP-3427. Improves the shuffle scheduler. It now waits for notifications + from shuffle threads when it has scheduled enough, before scheduling more. + (ddas) + + HADOOP-2393. Moves the handling of dir deletions in the tasktracker to + a separate thread. (Amareshwari Sriramadasu via ddas) + + HADOOP-3501. Deprecate InMemoryFileSystem. (cutting via omalley) + + HADOOP-3366. Stall the shuffle while in-memory merge is in progress. + (acmurthy) + + HADOOP-2916. Refactor src structure, but leave package structure alone. + (Raghu Angadi via mukund) + + HADOOP-3492. Add forrest documentation for user archives. + (Mahadev Konar via hairong) + + HADOOP-3467. Improve documentation for FileSystem::deleteOnExit. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3379. Documents stream.non.zero.exit.status.is.failure for Streaming. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3096. Improves documentation about the Task Execution Environment in + the Map-Reduce tutorial. (Amareshwari Sriramadasu via ddas) + + HADOOP-2984. Add forrest documentation for DistCp. (cdouglas) + + HADOOP-3406. Add forrest documentation for Profiling. + (Amareshwari Sriramadasu via ddas) + + HADOOP-2762. Add forrest documentation for controls of memory limits on + hadoop daemons and Map-Reduce tasks. (Amareshwari Sriramadasu via ddas) + + HADOOP-3535. Fix documentation and name of IOUtils.close to + reflect that it should only be used in cleanup contexts. (omalley) + + HADOOP-3593. Updates the mapred tutorial. (ddas) + + HADOOP-3547. Documents the way in which native libraries can be distributed + via the DistributedCache. (Amareshwari Sriramadasu via ddas) + + HADOOP-3606. Updates the Streaming doc. (Amareshwari Sriramadasu via ddas) + + HADOOP-3532. Add jdiff reports to the build scripts. (omalley) + + HADOOP-3100. Develop tests to test the DFS command line interface. (mukund) + + HADOOP-3688. Fix up HDFS docs. (Robert Chansler via hairong) + + OPTIMIZATIONS + + HADOOP-3274. The default constructor of BytesWritable creates empty + byte array. (Tsz Wo (Nicholas), SZE via shv) + + HADOOP-3272. Remove redundant copy of Block object in BlocksMap. + (Lohit Vjayarenu via shv) + + HADOOP-3164. Reduce DataNode CPU usage by using FileChannel.tranferTo(). + On Linux DataNode takes 5 times less CPU while serving data. Results may + vary on other platforms. (rangadi) + + HADOOP-3248. Optimization of saveFSImage. (Dhruba via shv) + + HADOOP-3297. Fetch more task completion events from the job + tracker and task tracker. (ddas via omalley) + + HADOOP-3364. Faster image and log edits loading. (shv) + + HADOOP-3369. Fast block processing during name-node startup. (shv) + + HADOOP-1702. Reduce buffer copies when data is written to DFS. + DataNodes take 30% less CPU while writing data. (rangadi) + + HADOOP-3095. Speed up split generation in the FileInputSplit, + especially for non-HDFS file systems. Deprecates + InputFormat.validateInput. (tomwhite via omalley) + + HADOOP-3552. Add forrest documentation for Hadoop commands. + (Sharad Agarwal via cdouglas) + + BUG FIXES + + HADOOP-2905. 'fsck -move' triggers NPE in NameNode. + (Lohit Vjayarenu via rangadi) + + Increment ClientProtocol.versionID missed by HADOOP-2585. (shv) + + HADOOP-3254. Restructure internal namenode methods that process + heartbeats to use well-defined BlockCommand object(s) instead of + using the base java Object. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-3176. Change lease record when a open-for-write-file + gets renamed. (dhruba) + + HADOOP-3269. Fix a case when namenode fails to restart + while processing a lease record. ((Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-3282. Port issues in TestCheckpoint resolved. (shv) + + HADOOP-3268. file:// URLs issue in TestUrlStreamHandler under Windows. + (taton) + + HADOOP-3127. Deleting files in trash should really remove them. + (Brice Arnould via omalley) + + HADOOP-3300. Fix locking of explicit locks in NetworkTopology. + (tomwhite via omalley) + + HADOOP-3270. Constant DatanodeCommands are stored in static final + immutable variables for better code clarity. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2793. Fix broken links for worst performing shuffle tasks in + the job history page. (Amareshwari Sriramadasu via ddas) + + HADOOP-3313. Avoid unnecessary calls to System.currentTimeMillis + in RPC::Invoker. (cdouglas) + + HADOOP-3318. Recognize "Darwin" as an alias for "Mac OS X" to + support Soylatte. (Sam Pullara via omalley) + + HADOOP-3301. Fix misleading error message when S3 URI hostname + contains an underscore. (tomwhite via omalley) + + HADOOP-3338. Fix Eclipse plugin to compile after HADOOP-544 was + committed. Updated all references to use the new JobID representation. + (taton via nigel) + + HADOOP-3337. Loading FSEditLog was broken by HADOOP-3283 since it + changed Writable serialization of DatanodeInfo. This patch handles it. + (Tsz Wo (Nicholas), SZE via rangadi) + + HADOOP-3101. Prevent JobClient from throwing an exception when printing + usage. (Edward J. Yoon via cdouglas) + + HADOOP-3119. Update javadoc for Text::getBytes to better describe its + behavior. (Tim Nelson via cdouglas) + + HADOOP-2294. Fix documentation in libhdfs to refer to the correct free + function. (Craig Macdonald via cdouglas) + + HADOOP-3335. Prevent the libhdfs build from deleting the wrong + files on make clean. (cutting via omalley) + + HADOOP-2930. Make {start,stop}-balancer.sh work even if hadoop-daemon.sh + is not in the PATH. (Spiros Papadimitriou via hairong) + + HADOOP-3085. Catch Exception in metrics util classes to ensure that + misconfigured metrics don't prevent others from updating. (cdouglas) + + HADOOP-3299. CompositeInputFormat should configure the sub-input + formats. (cdouglas via omalley) + + HADOOP-3309. Lower io.sort.mb and fs.inmemory.size.mb for MiniMRDFSSort + unit test so it passes on Windows. (lohit vijayarenu via cdouglas) + + HADOOP-3348. TestUrlStreamHandler should set URLStreamFactory after + DataNodes are initialized. (Lohit Vijayarenu via rangadi) + + HADOOP-3371. Ignore InstanceAlreadyExistsException from + MBeanUtil::registerMBean. (lohit vijayarenu via cdouglas) + + HADOOP-3349. A file rename was incorrectly changing the name inside a + lease record. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-3365. Removes an unnecessary copy of the key from SegmentDescriptor + to MergeQueue. (Devaraj Das) + + HADOOP-3388. Fix for TestDatanodeBlockScanner to handle blocks with + generation stamps in them. (dhruba) + + HADOOP-3203. Fixes TaskTracker::localizeJob to pass correct file sizes + for the jarfile and the jobfile. (Amareshwari Sriramadasu via ddas) + + HADOOP-3391. Fix a findbugs warning introduced by HADOOP-3248 (rangadi) + + HADOOP-3393. Fix datanode shutdown to call DataBlockScanner::shutdown and + close its log, even if the scanner thread is not running. (lohit vijayarenu + via cdouglas) + + HADOOP-3399. A debug message was logged at info level. (rangadi) + + HADOOP-3396. TestDatanodeBlockScanner occationally fails. + (Lohit Vijayarenu via rangadi) + + HADOOP-3339. Some of the failures on 3rd datanode in DFS write pipelie + are not detected properly. This could lead to hard failure of client's + write operation. (rangadi) + + HADOOP-3409. Namenode should save the root inode into fsimage. (hairong) + + HADOOP-3296. Fix task cache to work for more than two levels in the cache + hierarchy. This also adds a new counter to track cache hits at levels + greater than two. (Amar Kamat via cdouglas) + + HADOOP-3375. Lease paths were sometimes not removed from + LeaseManager.sortedLeasesByPath. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-3424. Values returned by getPartition should be checked to + make sure they are in the range 0 to #reduces - 1 (cdouglas via + omalley) + + HADOOP-3408. Change FSNamesystem to send its metrics as integers to + accommodate collectors that don't support long values. (lohit vijayarenu + via cdouglas) + + HADOOP-3403. Fixes a problem in the JobTracker to do with handling of lost + tasktrackers. (Arun Murthy via ddas) + + HADOOP-1318. Completed maps are not failed if the number of reducers are + zero. (Amareshwari Sriramadasu via ddas). + + HADOOP-3351. Fixes the history viewer tool to not do huge StringBuffer + allocations. (Amareshwari Sriramadasu via ddas) + + HADOOP-3419. Fixes TestFsck to wait for updates to happen before + checking results to make the test more reliable. (Lohit Vijaya + Renu via omalley) + + HADOOP-3259. Makes failure to read system properties due to a + security manager non-fatal. (Edward Yoon via omalley) + + HADOOP-3451. Update libhdfs to use FileSystem::getFileBlockLocations + instead of removed getFileCacheHints. (lohit vijayarenu via cdouglas) + + HADOOP-3401. Update FileBench to set the new + "mapred.work.output.dir" property to work post-3041. (cdouglas via omalley) + + HADOOP-2669. DFSClient locks pendingCreates appropriately. (dhruba) + + HADOOP-3410. Fix KFS implemenation to return correct file + modification time. (Sriram Rao via cutting) + + HADOOP-3340. Fix DFS metrics for BlocksReplicated, HeartbeatsNum, and + BlockReportsAverageTime. (lohit vijayarenu via cdouglas) + + HADOOP-3435. Remove the assuption in the scripts that bash is at + /bin/bash and fix the test patch to require bash instead of sh. + (Brice Arnould via omalley) + + HADOOP-3471. Fix spurious errors from TestIndexedSort and add additional + logging to let failures be reproducible. (cdouglas) + + HADOOP-3443. Avoid copying map output across partitions when renaming a + single spill. (omalley via cdouglas) + + HADOOP-3454. Fix Text::find to search only valid byte ranges. (Chad Whipkey + via cdouglas) + + HADOOP-3417. Removes the static configuration variable, + commandLineConfig from JobClient. Moves the cli parsing from + JobShell to GenericOptionsParser. Thus removes the class + org.apache.hadoop.mapred.JobShell. (Amareshwari Sriramadasu via + ddas) + + HADOOP-2132. Only RUNNING/PREP jobs can be killed. (Jothi Padmanabhan + via ddas) + + HADOOP-3476. Code cleanup in fuse-dfs. + (Peter Wyckoff via dhruba) + + HADOOP-2427. Ensure that the cwd of completed tasks is cleaned-up + correctly on task-completion. (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-2565. Remove DFSPath cache of FileStatus. + (Tsz Wo (Nicholas), SZE via hairong) + + HADOOP-3326. Cleanup the local-fs and in-memory merge in the ReduceTask by + spawing only one thread each for the on-disk and in-memory merge. + (Sharad Agarwal via acmurthy) + + HADOOP-3493. Fix TestStreamingFailure to use FileUtil.fullyDelete to + ensure correct cleanup. (Lohit Vijayarenu via acmurthy) + + HADOOP-3455. Fix NPE in ipc.Client in case of connection failure and + improve its synchronization. (hairong) + + HADOOP-3240. Fix a testcase to not create files in the current directory. + Instead the file is created in the test directory (Mahadev Konar via ddas) + + HADOOP-3496. Fix failure in TestHarFileSystem.testArchives due to change + in HADOOP-3095. (tomwhite) + + HADOOP-3135. Get the system directory from the JobTracker instead of from + the conf. (Subramaniam Krishnan via ddas) + + HADOOP-3503. Fix a race condition when client and namenode start + simultaneous recovery of the same block. (dhruba & Tsz Wo + (Nicholas), SZE) + + HADOOP-3440. Fixes DistributedCache to not create symlinks for paths which + don't have fragments even when createSymLink is true. + (Abhijit Bagri via ddas) + + HADOOP-3463. Hadoop-daemons script should cd to $HADOOP_HOME. (omalley) + + HADOOP-3489. Fix NPE in SafeModeMonitor. (Lohit Vijayarenu via shv) + + HADOOP-3509. Fix NPE in FSNamesystem.close. (Tsz Wo (Nicholas), SZE via + shv) + + HADOOP-3491. Name-node shutdown causes InterruptedException in + ResolutionMonitor. (Lohit Vijayarenu via shv) + + HADOOP-3511. Fixes namenode image to not set the root's quota to an + invalid value when the quota was not saved in the image. (hairong) + + HADOOP-3516. Ensure the JobClient in HadoopArchives is initialized + with a configuration. (Subramaniam Krishnan via omalley) + + HADOOP-3513. Improve NNThroughputBenchmark log messages. (shv) + + HADOOP-3519. Fix NPE in DFS FileSystem rename. (hairong via tomwhite) + + HADOOP-3528. Metrics FilesCreated and files_deleted metrics + do not match. (Lohit via Mahadev) + + HADOOP-3418. When a directory is deleted, any leases that point to files + in the subdirectory are removed. ((Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-3542. Diables the creation of _logs directory for the archives + directory. (Mahadev Konar via ddas) + + HADOOP-3544. Fixes a documentation issue for hadoop archives. + (Mahadev Konar via ddas) + + HADOOP-3517. Fixes a problem in the reducer due to which the last InMemory + merge may be missed. (Arun Murthy via ddas) + + HADOOP-3548. Fixes build.xml to copy all *.jar files to the dist. + (Owen O'Malley via ddas) + + HADOOP-3363. Fix unformatted storage detection in FSImage. (shv) + + HADOOP-3560. Fixes a problem to do with split creation in archives. + (Mahadev Konar via ddas) + + HADOOP-3545. Fixes a overflow problem in archives. + (Mahadev Konar via ddas) + + HADOOP-3561. Prevent the trash from deleting its parent directories. + (cdouglas) + + HADOOP-3575. Fix the clover ant target after package refactoring. + (Nigel Daley via cdouglas) + + HADOOP-3539. Fix the tool path in the bin/hadoop script under + cygwin. (Tsz Wo (Nicholas), Sze via omalley) + + HADOOP-3520. TestDFSUpgradeFromImage triggers a race condition in the + Upgrade Manager. Fixed. (dhruba) + + HADOOP-3586. Provide deprecated, backwards compatibile semantics for the + combiner to be run once and only once on each record. (cdouglas) + + HADOOP-3533. Add deprecated methods to provide API compatibility + between 0.18 and 0.17. Remove the deprecated methods in trunk. (omalley) + + HADOOP-3580. Fixes a problem to do with specifying a har as an input to + a job. (Mahadev Konar via ddas) + + HADOOP-3333. Don't assign a task to a tasktracker that it failed to + execute earlier (used to happen in the case of lost tasktrackers where + the tasktracker would reinitialize and bind to a different port). + (Jothi Padmanabhan and Arun Murthy via ddas) + + HADOOP-3534. Log IOExceptions that happen in closing the name + system when the NameNode shuts down. (Tsz Wo (Nicholas) Sze via omalley) + + HADOOP-3546. TaskTracker re-initialization gets stuck in cleaning up. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3576. Fix NullPointerException when renaming a directory + to its subdirectory. (Tse Wo (Nicholas), SZE via hairong) + + HADOOP-3320. Fix NullPointerException in NetworkTopology.getDistance(). + (hairong) + + HADOOP-3569. KFS input stream read() now correctly reads 1 byte + instead of 4. (Sriram Rao via omalley) + + HADOOP-3599. Fix JobConf::setCombineOnceOnly to modify the instance rather + than a parameter. (Owen O'Malley via cdouglas) + + HADOOP-3590. Null pointer exception in JobTracker when the task tracker is + not yet resolved. (Amar Ramesh Kamat via ddas) + + HADOOP-3603. Fix MapOutputCollector to spill when io.sort.spill.percent is + 1.0 and to detect spills when emitted records write no data. (cdouglas) + + HADOOP-3615. Set DatanodeProtocol.versionID to the correct value. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3559. Fix the libhdfs test script and config to work with the + current semantics. (lohit vijayarenu via cdouglas) + + HADOOP-3480. Need to update Eclipse template to reflect current trunk. + (Brice Arnould via tomwhite) + + HADOOP-3588. Fixed usability issues with archives. (mahadev) + + HADOOP-3635. Uncaught exception in DataBlockScanner. + (Tsz Wo (Nicholas), SZE via hairong) + + HADOOP-3639. Exception when closing DFSClient while multiple files are + open. (Benjamin Gufler via hairong) + + HADOOP-3572. SetQuotas usage interface has some minor bugs. (hairong) + + HADOOP-3649. Fix bug in removing blocks from the corrupted block map. + (Lohit Vijayarenu via shv) + + HADOOP-3604. Work around a JVM synchronization problem observed while + retrieving the address of direct buffers from compression code by obtaining + a lock during this call. (Arun C Murthy via cdouglas) + + HADOOP-3683. Fix dfs metrics to count file listings rather than files + listed. (lohit vijayarenu via cdouglas) + + HADOOP-3597. Fix SortValidator to use filesystems other than the default as + input. Validation job still runs on default fs. + (Jothi Padmanabhan via cdouglas) + + HADOOP-3693. Fix archives, distcp and native library documentation to + conform to style guidelines. (Amareshwari Sriramadasu via cdouglas) + + HADOOP-3653. Fix test-patch target to properly account for Eclipse + classpath jars. (Brice Arnould via nigel) + + HADOOP-3692. Fix documentation for Cluster setup and Quick start guides. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3691. Fix streaming and tutorial docs. (Jothi Padmanabhan via ddas) + + HADOOP-3630. Fix NullPointerException in CompositeRecordReader from empty + sources (cdouglas) + + HADOOP-3706. Fix a ClassLoader issue in the mapred.join Parser that + prevents it from loading user-specified InputFormats. + (Jingkei Ly via cdouglas) + + HADOOP-3718. Fix KFSOutputStream::write(int) to output a byte instead of + an int, per the OutputStream contract. (Sriram Rao via cdouglas) + + HADOOP-3647. Add debug logs to help track down a very occassional, + hard-to-reproduce, bug in shuffle/merge on the reducer. (acmurthy) + + HADOOP-3716. Prevent listStatus in KosmosFileSystem from returning + null for valid, empty directories. (Sriram Rao via cdouglas) + + HADOOP-3752. Fix audit logging to record rename events. (cdouglas) + + HADOOP-3737. Fix CompressedWritable to call Deflater::end to release + compressor memory. (Grant Glouser via cdouglas) + + HADOOP-3670. Fixes JobTracker to clear out split bytes when no longer + required. (Amareshwari Sriramadasu via ddas) + + HADOOP-3755. Update gridmix to work with HOD 0.4 (Runping Qi via cdouglas) + + HADOOP-3743. Fix -libjars, -files, -archives options to work even if + user code does not implement tools. (Amareshwari Sriramadasu via mahadev) + + HADOOP-3774. Fix typos in shell output. (Tsz Wo (Nicholas), SZE via + cdouglas) + + HADOOP-3762. Fixed FileSystem cache to work with the default port. (cutting + via omalley) + + HADOOP-3798. Fix tests compilation. (Mukund Madhugiri via omalley) + + HADOOP-3794. Return modification time instead of zero for KosmosFileSystem. + (Sriram Rao via cdouglas) + + HADOOP-3806. Remove debug statement to stdout from QuickSort. (cdouglas) + + HADOOP-3776. Fix NPE at NameNode when datanode reports a block after it is + deleted at NameNode. (rangadi) + + HADOOP-3537. Disallow adding a datanode to a network topology when its + network location is not resolved. (hairong) + + HADOOP-3571. Fix bug in block removal used in lease recovery. (shv) + + HADOOP-3645. MetricsTimeVaryingRate returns wrong value for + metric_avg_time. (Lohit Vijayarenu via hairong) + + HADOOP-3521. Reverted the missing cast to float for sending Counters' values + to Hadoop metrics which was removed by HADOOP-544. (acmurthy) + + HADOOP-3820. Fixes two problems in the gridmix-env - a syntax error, and a + wrong definition of USE_REAL_DATASET by default. (Arun Murthy via ddas) + + HADOOP-3724. Fixes two problems related to storing and recovering lease + in the fsimage. (dhruba) + + HADOOP-3827. Fixed compression of empty map-outputs. (acmurthy) + + HADOOP-3865. Remove reference to FSNamesystem from metrics preventing + garbage collection. (Lohit Vijayarenu via cdouglas) + + HADOOP-3884. Fix so that Eclipse plugin builds against recent + Eclipse releases. (cutting) + + HADOOP-3837. Streaming jobs report progress status. (dhruba) + + HADOOP-3897. Fix a NPE in secondary namenode. (Lohit Vijayarenu via + cdouglas) + + HADOOP-3901. Fix bin/hadoop to correctly set classpath under cygwin. + (Tsz Wo (Nicholas) Sze via omalley) + + HADOOP-3947. Fix a problem in tasktracker reinitialization. + (Amareshwari Sriramadasu via ddas) + +Release 0.17.3 - Unreleased + + IMPROVEMENTS + + HADOOP-4164. Chinese translation of the documentation. (Xuebing Yan via + omalley) + + BUG FIXES + + HADOOP-4277. Checksum verification was mistakenly disabled for + LocalFileSystem. (Raghu Angadi) + + HADOOP-4271. Checksum input stream can sometimes return invalid + data to the user. (Ning Li via rangadi) + + HADOOP-4318. DistCp should use absolute paths for cleanup. (szetszwo) + + HADOOP-4326. ChecksumFileSystem does not override create(...) correctly. + (szetszwo) + +Release 0.17.2 - 2008-08-11 + + BUG FIXES + + HADOOP-3678. Avoid spurious exceptions logged at DataNode when clients + read from DFS. (rangadi) + + HADOOP-3707. NameNode keeps a count of number of blocks scheduled + to be written to a datanode and uses it to avoid allocating more + blocks than a datanode can hold. (rangadi) + + HADOOP-3760. Fix a bug with HDFS file close() mistakenly introduced + by HADOOP-3681. (Lohit Vijayarenu via rangadi) + + HADOOP-3681. DFSClient can get into an infinite loop while closing + a file if there are some errors. (Lohit Vijayarenu via rangadi) + + HADOOP-3002. Hold off block removal while in safe mode. (shv) + + HADOOP-3685. Unbalanced replication target. (hairong) + + HADOOP-3758. Shutdown datanode on version mismatch instead of retrying + continuously, preventing excessive logging at the namenode. + (lohit vijayarenu via cdouglas) + + HADOOP-3633. Correct exception handling in DataXceiveServer, and throttle + the number of xceiver threads in a data-node. (shv) + + HADOOP-3370. Ensure that the TaskTracker.runningJobs data-structure is + correctly cleaned-up on task completion. (Zheng Shao via acmurthy) + + HADOOP-3813. Fix task-output clean-up on HDFS to use the recursive + FileSystem.delete rather than the FileUtil.fullyDelete. (Amareshwari + Sri Ramadasu via acmurthy) + + HADOOP-3859. Allow the maximum number of xceivers in the data node to + be configurable. (Johan Oskarsson via omalley) + + HADOOP-3931. Fix corner case in the map-side sort that causes some values + to be counted as too large and cause pre-mature spills to disk. Some values + will also bypass the combiner incorrectly. (cdouglas via omalley) + +Release 0.17.1 - 2008-06-23 + + INCOMPATIBLE CHANGES + + HADOOP-3565. Fix the Java serialization, which is not enabled by + default, to clear the state of the serializer between objects. + (tomwhite via omalley) + + IMPROVEMENTS + + HADOOP-3522. Improve documentation on reduce pointing out that + input keys and values will be reused. (omalley) + + HADOOP-3487. Balancer uses thread pools for managing its threads; + therefore provides better resource management. (hairong) + + BUG FIXES + + HADOOP-2159 Namenode stuck in safemode. The counter blockSafe should + not be decremented for invalid blocks. (hairong) + + HADOOP-3472 MapFile.Reader getClosest() function returns incorrect results + when before is true (Todd Lipcon via Stack) + + HADOOP-3442. Limit recursion depth on the stack for QuickSort to prevent + StackOverflowErrors. To avoid O(n*n) cases, when partitioning depth exceeds + a multiple of log(n), change to HeapSort. (cdouglas) + + HADOOP-3477. Fix build to not package contrib/*/bin twice in + distributions. (Adam Heath via cutting) + + HADOOP-3475. Fix MapTask to correctly size the accounting allocation of + io.sort.mb. (cdouglas) + + HADOOP-3550. Fix the serialization data structures in MapTask where the + value lengths are incorrectly calculated. (cdouglas) + + HADOOP-3526. Fix contrib/data_join framework by cloning values retained + in the reduce. (Spyros Blanas via cdouglas) + + HADOOP-1979. Speed up fsck by adding a buffered stream. (Lohit + Vijaya Renu via omalley) + +Release 0.17.0 - 2008-05-18 + + INCOMPATIBLE CHANGES + + HADOOP-2786. Move hbase out of hadoop core + + HADOOP-2345. New HDFS transactions to support appending + to files. Disk layout version changed from -11 to -12. (dhruba) + + HADOOP-2192. Error messages from "dfs mv" command improved. + (Mahadev Konar via dhruba) + + HADOOP-1902. "dfs du" command without any arguments operates on the + current working directory. (Mahadev Konar via dhruba) + + HADOOP-2873. Fixed bad disk format introduced by HADOOP-2345. + Disk layout version changed from -12 to -13. See changelist 630992 + (dhruba) + + HADOOP-1985. This addresses rack-awareness for Map tasks and for + HDFS in a uniform way. (ddas) + + HADOOP-1986. Add support for a general serialization mechanism for + Map Reduce. (tomwhite) + + HADOOP-771. FileSystem.delete() takes an explicit parameter that + specifies whether a recursive delete is intended. + (Mahadev Konar via dhruba) + + HADOOP-2470. Remove getContentLength(String), open(String, long, long) + and isDir(String) from ClientProtocol. ClientProtocol version changed + from 26 to 27. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-2822. Remove deprecated code for classes InputFormatBase and + PhasedFileSystem. (Amareshwari Sriramadasu via enis) + + HADOOP-2116. Changes the layout of the task execution directory. + (Amareshwari Sriramadasu via ddas) + + HADOOP-2828. The following deprecated methods in Configuration.java + have been removed + getObject(String name) + setObject(String name, Object value) + get(String name, Object defaultValue) + set(String name, Object value) + Iterator entries() + (Amareshwari Sriramadasu via ddas) + + HADOOP-2824. Removes one deprecated constructor from MiniMRCluster. + (Amareshwari Sriramadasu via ddas) + + HADOOP-2823. Removes deprecated methods getColumn(), getLine() from + org.apache.hadoop.record.compiler.generated.SimpleCharStream. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3060. Removes one unused constructor argument from MiniMRCluster. + (Amareshwari Sriramadasu via ddas) + + HADOOP-2854. Remove deprecated o.a.h.ipc.Server::getUserInfo(). + (lohit vijayarenu via cdouglas) + + HADOOP-2563. Remove deprecated FileSystem::listPaths. + (lohit vijayarenu via cdouglas) + + HADOOP-2818. Remove deprecated methods in Counters. + (Amareshwari Sriramadasu via tomwhite) + + HADOOP-2831. Remove deprecated o.a.h.dfs.INode::getAbsoluteName() + (lohit vijayarenu via cdouglas) + + HADOOP-2839. Remove deprecated FileSystem::globPaths. + (lohit vijayarenu via cdouglas) + + HADOOP-2634. Deprecate ClientProtocol::exists. + (lohit vijayarenu via cdouglas) + + HADOOP-2410. Make EC2 cluster nodes more independent of each other. + Multiple concurrent EC2 clusters are now supported, and nodes may be + added to a cluster on the fly with new nodes starting in the same EC2 + availability zone as the cluster. Ganglia monitoring and large + instance sizes have also been added. (Chris K Wensel via tomwhite) + + HADOOP-2826. Deprecated FileSplit.getFile(), LineRecordReader.readLine(). + (Amareshwari Sriramadasu via ddas) + + HADOOP-3239. getFileInfo() returns null for non-existing files instead + of throwing FileNotFoundException. (Lohit Vijayarenu via shv) + + HADOOP-3266. Removed HOD changes from CHANGES.txt, as they are now inside + src/contrib/hod (Hemanth Yamijala via ddas) + + HADOOP-3280. Separate the configuration of the virtual memory size + (mapred.child.ulimit) from the jvm heap size, so that 64 bit + streaming applications are supported even when running with 32 bit + jvms. (acmurthy via omalley) + + NEW FEATURES + + HADOOP-1398. Add HBase in-memory block cache. (tomwhite) + + HADOOP-2178. Job History on DFS. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2063. A new parameter to dfs -get command to fetch a file + even if it is corrupted. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2219. A new command "df -count" that counts the number of + files and directories. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2906. Add an OutputFormat capable of using keys, values, and + config params to map records to different output files. + (Runping Qi via cdouglas) + + HADOOP-2346. Utilities to support timeout while writing to sockets. + DFSClient and DataNode sockets have 10min write timeout. (rangadi) + + HADOOP-2951. Add a contrib module that provides a utility to + build or update Lucene indexes using Map/Reduce. (Ning Li via cutting) + + HADOOP-1622. Allow multiple jar files for map reduce. + (Mahadev Konar via dhruba) + + HADOOP-2055. Allows users to set PathFilter on the FileInputFormat. + (Alejandro Abdelnur via ddas) + + HADOOP-2551. More environment variables like HADOOP_NAMENODE_OPTS + for better control of HADOOP_OPTS for each component. (rangadi) + + HADOOP-3001. Add job counters that measure the number of bytes + read and written to HDFS, S3, KFS, and local file systems. (omalley) + + HADOOP-3048. A new Interface and a default implementation to convert + and restore serializations of objects to/from strings. (enis) + + IMPROVEMENTS + + HADOOP-2655. Copy on write for data and metadata files in the + presence of snapshots. Needed for supporting appends to HDFS + files. (dhruba) + + HADOOP-1967. When a Path specifies the same scheme as the default + FileSystem but no authority, the default FileSystem's authority is + used. Also add warnings for old-format FileSystem names, accessor + methods for fs.default.name, and check for null authority in HDFS. + (cutting) + + HADOOP-2895. Let the profiling string be configurable. + (Martin Traverso via cdouglas) + + HADOOP-910. Enables Reduces to do merges for the on-disk map output files + in parallel with their copying. (Amar Kamat via ddas) + + HADOOP-730. Use rename rather than copy for local renames. (cdouglas) + + HADOOP-2810. Updated the Hadoop Core logo. (nigel) + + HADOOP-2057. Streaming should optionally treat a non-zero exit status + of a child process as a failed task. (Rick Cox via tomwhite) + + HADOOP-2765. Enables specifying ulimits for streaming/pipes tasks (ddas) + + HADOOP-2888. Make gridmix scripts more readily configurable and amenable + to automated execution. (Mukund Madhugiri via cdouglas) + + HADOOP-2908. A document that describes the DFS Shell command. + (Mahadev Konar via dhruba) + + HADOOP-2981. Update README.txt to reflect the upcoming use of + cryptography. (omalley) + + HADOOP-2804. Add support to publish CHANGES.txt as HTML when running + the Ant 'docs' target. (nigel) + + HADOOP-2559. Change DFS block placement to allocate the first replica + locally, the second off-rack, and the third intra-rack from the + second. (lohit vijayarenu via cdouglas) + + HADOOP-2939. Make the automated patch testing process an executable + Ant target, test-patch. (nigel) + + HADOOP-2239. Add HsftpFileSystem to permit transferring files over ssl. + (cdouglas) + + HADOOP-2886. Track individual RPC metrics. + (girish vaitheeswaran via dhruba) + + HADOOP-2373. Improvement in safe-mode reporting. (shv) + + HADOOP-3091. Modify FsShell command -put to accept multiple sources. + (Lohit Vijaya Renu via cdouglas) + + HADOOP-3092. Show counter values from job -status command. + (Tom White via ddas) + + HADOOP-1228. Ant task to generate Eclipse project files. (tomwhite) + + HADOOP-3093. Adds Configuration.getStrings(name, default-value) and + the corresponding setStrings. (Amareshwari Sriramadasu via ddas) + + HADOOP-3106. Adds documentation in forrest for debugging. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3099. Add an option to distcp to preserve user, group, and + permission information. (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-2841. Unwrap AccessControlException and FileNotFoundException + from RemoteException for DFSClient. (shv) + + HADOOP-3152. Make index interval configuable when using + MapFileOutputFormat for map-reduce job. (Rong-En Fan via cutting) + + HADOOP-3143. Decrease number of slaves from 4 to 3 in TestMiniMRDFSSort, + as Hudson generates false negatives under the current load. + (Nigel Daley via cdouglas) + + HADOOP-3174. Illustrative example for MultipleFileInputFormat. (Enis + Soztutar via acmurthy) + + HADOOP-2993. Clarify the usage of JAVA_HOME in the Quick Start guide. + (acmurthy via nigel) + + HADOOP-3124. Make DataNode socket write timeout configurable. (rangadi) + + OPTIMIZATIONS + + HADOOP-2790. Fixed inefficient method hasSpeculativeTask by removing + repetitive calls to get the current time and late checking to see if + we want speculation on at all. (omalley) + + HADOOP-2758. Reduce buffer copies in DataNode when data is read from + HDFS, without negatively affecting read throughput. (rangadi) + + HADOOP-2399. Input key and value to combiner and reducer is reused. + (Owen O'Malley via ddas). + + HADOOP-2423. Code optimization in FSNamesystem.mkdirs. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2606. ReplicationMonitor selects data-nodes to replicate directly + from needed replication blocks instead of looking up for the blocks for + each live data-node. (shv) + + HADOOP-2148. Eliminate redundant data-node blockMap lookups. (shv) + + HADOOP-2027. Return the number of bytes in each block in a file + via a single rpc to the namenode to speed up job planning. + (Lohit Vijaya Renu via omalley) + + HADOOP-2902. Replace uses of "fs.default.name" with calls to the + accessor methods added in HADOOP-1967. (cutting) + + HADOOP-2119. Optimize scheduling of jobs with large numbers of + tasks by replacing static arrays with lists of runnable tasks. + (Amar Kamat via omalley) + + HADOOP-2919. Reduce the number of memory copies done during the + map output sorting. Also adds two config variables: + io.sort.spill.percent - the percentages of io.sort.mb that should + cause a spill (default 80%) + io.sort.record.percent - the percent of io.sort.mb that should + hold key/value indexes (default 5%) + (cdouglas via omalley) + + HADOOP-3140. Doesn't add a task in the commit queue if the task hadn't + generated any output. (Amar Kamat via ddas) + + HADOOP-3168. Reduce the amount of logging in streaming to an + exponentially increasing number of records (up to 10,000 + records/log). (Zheng Shao via omalley) + + BUG FIXES + + HADOOP-2195. '-mkdir' behaviour is now closer to Linux shell in case of + errors. (Mahadev Konar via rangadi) + + HADOOP-2190. bring behaviour '-ls' and '-du' closer to Linux shell + commands in case of errors. (Mahadev Konar via rangadi) + + HADOOP-2193. 'fs -rm' and 'fs -rmr' show error message when the target + file does not exist. (Mahadev Konar via rangadi) + + HADOOP-2738 Text is not subclassable because set(Text) and compareTo(Object) + access the other instance's private members directly. (jimk) + + HADOOP-2779. Remove the references to HBase in the build.xml. (omalley) + + HADOOP-2194. dfs cat on a non-existent file throws FileNotFoundException. + (Mahadev Konar via dhruba) + + HADOOP-2767. Fix for NetworkTopology erroneously skipping the last leaf + node on a rack. (Hairong Kuang and Mark Butler via dhruba) + + HADOOP-1593. FsShell works with paths in non-default FileSystem. + (Mahadev Konar via dhruba) + + HADOOP-2191. du and dus command on non-existent directory gives + appropriate error message. (Mahadev Konar via dhruba) + + HADOOP-2832. Remove tabs from code of DFSClient for better + indentation. (dhruba) + + HADOOP-2844. distcp closes file handles for sequence files. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2727. Fix links in Web UI of the hadoop daemons and some docs + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2871. Fixes a problem to do with file: URI in the JobHistory init. + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2800. Deprecate SetFile.Writer constructor not the whole class. + (Johan Oskarsson via tomwhite) + + HADOOP-2891. DFSClient.close() closes all open files. (dhruba) + + HADOOP-2845. Fix dfsadmin disk utilization report on Solaris. + (Martin Traverso via tomwhite) + + HADOOP-2912. MiniDFSCluster restart should wait for namenode to exit + safemode. This was causing TestFsck to fail. (Mahadev Konar via dhruba) + + HADOOP-2820. The following classes in streaming are removed : + StreamLineRecordReader StreamOutputFormat StreamSequenceRecordReader. + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2819. The following methods in JobConf are removed: + getInputKeyClass() setInputKeyClass getInputValueClass() + setInputValueClass(Class theClass) setSpeculativeExecution + getSpeculativeExecution() (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2817. Removes deprecated mapred.tasktracker.tasks.maximum and + ClusterStatus.getMaxTasks(). (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2821. Removes deprecated ShellUtil and ToolBase classes from + the util package. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2934. The namenode was encountreing a NPE while loading + leases from the fsimage. Fixed. (dhruba) + + HADOOP-2938. Some fs commands did not glob paths. + (Tsz Wo (Nicholas), SZE via rangadi) + + HADOOP-2943. Compression of intermediate map output causes failures + in the merge. (cdouglas) + + HADOOP-2870. DataNode and NameNode closes all connections while + shutting down. (Hairong Kuang via dhruba) + + HADOOP-2973. Fix TestLocalDFS for Windows platform. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2971. select multiple times if it returns early in + SocketIOWithTimeout. (rangadi) + + HADOOP-2955. Fix TestCrcCorruption test failures caused by HADOOP-2758 + (rangadi) + + HADOOP-2657. A flush call on the DFSOutputStream flushes the last + partial CRC chunk too. (dhruba) + + HADOOP-2974. IPC unit tests used "0.0.0.0" to connect to server, which + is not always supported. (rangadi) + + HADOOP-2996. Fixes uses of StringBuffer in StreamUtils class. + (Dave Brosius via ddas) + + HADOOP-2995. Fixes StreamBaseRecordReader's getProgress to return a + floating point number. (Dave Brosius via ddas) + + HADOOP-2972. Fix for a NPE in FSDataset.invalidate. + (Mahadev Konar via dhruba) + + HADOOP-2994. Code cleanup for DFSClient: remove redundant + conversions from string to string. (Dave Brosius via dhruba) + + HADOOP-3009. TestFileCreation sometimes fails because restarting + minidfscluster sometimes creates datanodes with ports that are + different from their original instance. (dhruba) + + HADOOP-2992. Distributed Upgrade framework works correctly with + more than one upgrade object. (Konstantin Shvachko via dhruba) + + HADOOP-2679. Fix a typo in libhdfs. (Jason via dhruba) + + HADOOP-2976. When a lease expires, the Namenode ensures that + blocks of the file are adequately replicated. (dhruba) + + HADOOP-2901. Fixes the creation of info servers in the JobClient + and JobTracker. Removes the creation from JobClient and removes + additional info server from the JobTracker. Also adds the command + line utility to view the history files (HADOOP-2896), and fixes + bugs in JSPs to do with analysis - HADOOP-2742, HADOOP-2792. + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2890. If different datanodes report the same block but + with different sizes to the namenode, the namenode picks the + replica(s) with the largest size as the only valid replica(s). (dhruba) + + HADOOP-2825. Deprecated MapOutputLocation.getFile() is removed. + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2806. Fixes a streaming document. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3008. SocketIOWithTimeout throws InterruptedIOException if the + thread is interrupted while it is waiting. (rangadi) + + HADOOP-3006. Fix wrong packet size reported by DataNode when a block + is being replicated. (rangadi) + + HADOOP-3029. Datanode prints log message "firstbadlink" only if + it detects a bad connection to another datanode in the pipeline. (dhruba) + + HADOOP-3030. Release reserved space for file in InMemoryFileSystem if + checksum reservation fails. (Devaraj Das via cdouglas) + + HADOOP-3036. Fix findbugs warnings in UpgradeUtilities. (Konstantin + Shvachko via cdouglas) + + HADOOP-3025. ChecksumFileSystem supports the delete method with + the recursive flag. (Mahadev Konar via dhruba) + + HADOOP-3012. dfs -mv file to user home directory throws exception if + the user home directory does not exist. (Mahadev Konar via dhruba) + + HADOOP-3066. Should not require superuser privilege to query if hdfs is in + safe mode (jimk) + + HADOOP-3040. If the input line starts with the separator char, the key + is set as empty. (Amareshwari Sriramadasu via ddas) + + HADOOP-3080. Removes flush calls from JobHistory. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3086. Adds the testcase missed during commit of hadoop-3040. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3046. Fix the raw comparators for Text and BytesWritables + to use the provided length rather than recompute it. (omalley) + + HADOOP-3094. Fix BytesWritable.toString to avoid extending the sign bit + (Owen O'Malley via cdouglas) + + HADOOP-3067. DFSInputStream's position read does not close the sockets. + (rangadi) + + HADOOP-3073. close() on SocketInputStream or SocketOutputStream should + close the underlying channel. (rangadi) + + HADOOP-3087. Fixes a problem to do with refreshing of loadHistory.jsp. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3065. Better logging message if the rack location of a datanode + cannot be determined. (Devaraj Das via dhruba) + + HADOOP-3064. Commas in a file path should not be treated as delimiters. + (Hairong Kuang via shv) + + HADOOP-2997. Adds test for non-writable serialier. Also fixes a problem + introduced by HADOOP-2399. (Tom White via ddas) + + HADOOP-3114. Fix TestDFSShell on Windows. (Lohit Vijaya Renu via cdouglas) + + HADOOP-3118. Fix Namenode NPE while loading fsimage after a cluster + upgrade from older disk format. (dhruba) + + HADOOP-3161. Fix FIleUtil.HardLink.getLinkCount on Mac OS. (nigel + via omalley) + + HADOOP-2927. Fix TestDU to acurately calculate the expected file size. + (shv via nigel) + + HADOOP-3123. Fix the native library build scripts to work on Solaris. + (tomwhite via omalley) + + HADOOP-3089. Streaming should accept stderr from task before + first key arrives. (Rick Cox via tomwhite) + + HADOOP-3146. A DFSOutputStream.flush method is renamed as + DFSOutputStream.fsync. (dhruba) + + HADOOP-3165. -put/-copyFromLocal did not treat input file "-" as stdin. + (Lohit Vijayarenu via rangadi) + + HADOOP-3041. Deprecate JobConf.setOutputPath and JobConf.getOutputPath. + Deprecate OutputFormatBase. Add FileOutputFormat. Existing output formats + extending OutputFormatBase, now extend FileOutputFormat. Add the following + APIs in FileOutputFormat: setOutputPath, getOutputPath, getWorkOutputPath. + (Amareshwari Sriramadasu via nigel) + + HADOOP-3083. The fsimage does not store leases. This would have to be + reworked in the next release to support appends. (dhruba) + + HADOOP-3166. Fix an ArrayIndexOutOfBoundsException in the spill thread + and make exception handling more promiscuous to catch this condition. + (cdouglas) + + HADOOP-3050. DataNode sends one and only one block report after + it registers with the namenode. (Hairong Kuang) + + HADOOP-3044. NNBench sets the right configuration for the mapper. + (Hairong Kuang) + + HADOOP-3178. Fix GridMix scripts for small and medium jobs + to handle input paths differently. (Mukund Madhugiri via nigel) + + HADOOP-1911. Fix an infinite loop in DFSClient when all replicas of a + block are bad (cdouglas) + + HADOOP-3157. Fix path handling in DistributedCache and TestMiniMRLocalFS. + (Doug Cutting via rangadi) + + HADOOP-3018. Fix the eclipse plug-in contrib wrt removed deprecated + methods (taton) + + HADOOP-3183. Fix TestJobShell to use 'ls' instead of java.io.File::exists + since cygwin symlinks are unsupported. + (Mahadev konar via cdouglas) + + HADOOP-3175. Fix FsShell.CommandFormat to handle "-" in arguments. + (Edward J. Yoon via rangadi) + + HADOOP-3220. Safemode message corrected. (shv) + + HADOOP-3208. Fix WritableDeserializer to set the Configuration on + deserialized Writables. (Enis Soztutar via cdouglas) + + HADOOP-3224. 'dfs -du /dir' does not return correct size. + (Lohit Vjayarenu via rangadi) + + HADOOP-3223. Fix typo in help message for -chmod. (rangadi) + + HADOOP-1373. checkPath() should ignore case when it compares authoriy. + (Edward J. Yoon via rangadi) + + HADOOP-3204. Fixes a problem to do with ReduceTask's LocalFSMerger not + catching Throwable. (Amar Ramesh Kamat via ddas) + + HADOOP-3229. Report progress when collecting records from the mapper and + the combiner. (Doug Cutting via cdouglas) + + HADOOP-3225. Unwrapping methods of RemoteException should initialize + detailedMassage field. (Mahadev Konar, shv, cdouglas) + + HADOOP-3247. Fix gridmix scripts to use the correct globbing syntax and + change maxentToSameCluster to run the correct number of jobs. + (Runping Qi via cdouglas) + + HADOOP-3242. Fix the RecordReader of SequenceFileAsBinaryInputFormat to + correctly read from the start of the split and not the beginning of the + file. (cdouglas via acmurthy) + + HADOOP-3256. Encodes the job name used in the filename for history files. + (Arun Murthy via ddas) + + HADOOP-3162. Ensure that comma-separated input paths are treated correctly + as multiple input paths. (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-3263. Ensure that the job-history log file always follows the + pattern of hostname_timestamp_jobid_username_jobname even if username + and/or jobname are not specfied. This helps to avoid wrong assumptions + made about the job-history log filename in jobhistory.jsp. (acmurthy) + + HADOOP-3251. Fixes getFilesystemName in JobTracker and LocalJobRunner to + use FileSystem.getUri instead of FileSystem.getName. (Arun Murthy via ddas) + + HADOOP-3237. Fixes TestDFSShell.testErrOutPut on Windows platform. + (Mahadev Konar via ddas) + + HADOOP-3279. TaskTracker checks for SUCCEEDED task status in addition to + COMMIT_PENDING status when it fails maps due to lost map. + (Devaraj Das) + + HADOOP-3286. Prevent collisions in gridmix output dirs by increasing the + granularity of the timestamp. (Runping Qi via cdouglas) + + HADOOP-3285. Fix input split locality when the splits align to + fs blocks. (omalley) + + HADOOP-3372. Fix heap management in streaming tests. (Arun Murthy via + cdouglas) + + HADOOP-3031. Fix javac warnings in test classes. (cdouglas) + + HADOOP-3382. Fix memory leak when files are not cleanly closed (rangadi) + + HADOOP-3322. Fix to push MetricsRecord for rpc metrics. (Eric Yang via + mukund) + +Release 0.16.4 - 2008-05-05 + + BUG FIXES + + HADOOP-3138. DFS mkdirs() should not throw an exception if the directory + already exists. (rangadi via mukund) + + HADOOP-3294. Fix distcp to check the destination length and retry the copy + if it doesn't match the src length. (Tsz Wo (Nicholas), SZE via mukund) + + HADOOP-3186. Fix incorrect permission checkding for mv and renameTo + in HDFS. (Tsz Wo (Nicholas), SZE via mukund) + +Release 0.16.3 - 2008-04-16 + + BUG FIXES + + HADOOP-3010. Fix ConcurrentModificationException in ipc.Server.Responder. + (rangadi) + + HADOOP-3154. Catch all Throwables from the SpillThread in MapTask, rather + than IOExceptions only. (ddas via cdouglas) + + HADOOP-3159. Avoid file system cache being overwritten whenever + configuration is modified. (Tsz Wo (Nicholas), SZE via hairong) + + HADOOP-3139. Remove the consistency check for the FileSystem cache in + closeAll() that causes spurious warnings and a deadlock. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3195. Fix TestFileSystem to be deterministic. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-3069. Primary name-node should not truncate image when transferring + it from the secondary. (shv) + + HADOOP-3182. Change permissions of the job-submission directory to 777 + from 733 to ensure sharing of HOD clusters works correctly. (Tsz Wo + (Nicholas), Sze and Amareshwari Sri Ramadasu via acmurthy) + +Release 0.16.2 - 2008-04-02 + + BUG FIXES + + HADOOP-3011. Prohibit distcp from overwriting directories on the + destination filesystem with files. (cdouglas) + + HADOOP-3033. The BlockReceiver thread in the datanode writes data to + the block file, changes file position (if needed) and flushes all by + itself. The PacketResponder thread does not flush block file. (dhruba) + + HADOOP-2978. Fixes the JobHistory log format for counters. + (Runping Qi via ddas) + + HADOOP-2985. Fixes LocalJobRunner to tolerate null job output path. + Also makes the _temporary a constant in MRConstants.java. + (Amareshwari Sriramadasu via ddas) + + HADOOP-3003. FileSystem cache key is updated after a + FileSystem object is created. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-3042. Updates the Javadoc in JobConf.getOutputPath to reflect + the actual temporary path. (Amareshwari Sriramadasu via ddas) + + HADOOP-3007. Tolerate mirror failures while DataNode is replicating + blocks as it used to before. (rangadi) + + HADOOP-2944. Fixes a "Run on Hadoop" wizard NPE when creating a + Location from the wizard. (taton) + + HADOOP-3049. Fixes a problem in MultiThreadedMapRunner to do with + catching RuntimeExceptions. (Alejandro Abdelnur via ddas) + + HADOOP-3039. Fixes a problem to do with exceptions in tasks not + killing jobs. (Amareshwari Sriramadasu via ddas) + + HADOOP-3027. Fixes a problem to do with adding a shutdown hook in + FileSystem. (Amareshwari Sriramadasu via ddas) + + HADOOP-3056. Fix distcp when the target is an empty directory by + making sure the directory is created first. (cdouglas and acmurthy + via omalley) + + HADOOP-3070. Protect the trash emptier thread from null pointer + exceptions. (Koji Noguchi via omalley) + + HADOOP-3084. Fix HftpFileSystem to work for zero-lenghth files. + (cdouglas) + + HADOOP-3107. Fix NPE when fsck invokes getListings. (dhruba) + + HADOOP-3104. Limit MultithreadedMapRunner to have a fixed length queue + between the RecordReader and the map threads. (Alejandro Abdelnur via + omalley) + + HADOOP-2833. Do not use "Dr. Who" as the default user in JobClient. + A valid user name is required. (Tsz Wo (Nicholas), SZE via rangadi) + + HADOOP-3128. Throw RemoteException in setPermissions and setOwner of + DistributedFileSystem. (shv via nigel) + +Release 0.16.1 - 2008-03-13 + + INCOMPATIBLE CHANGES + + HADOOP-2869. Deprecate SequenceFile.setCompressionType in favor of + SequenceFile.createWriter, SequenceFileOutputFormat.setCompressionType, + and JobConf.setMapOutputCompressionType. (Arun C Murthy via cdouglas) + Configuration changes to hadoop-default.xml: + deprecated io.seqfile.compression.type + + IMPROVEMENTS + + HADOOP-2371. User guide for file permissions in HDFS. + (Robert Chansler via rangadi) + + HADOOP-3098. Allow more characters in user and group names while + using -chown and -chgrp commands. (rangadi) + + BUG FIXES + + HADOOP-2789. Race condition in IPC Server Responder that could close + connections early. (Raghu Angadi) + + HADOOP-2785. minor. Fix a typo in Datanode block verification + (Raghu Angadi) + + HADOOP-2788. minor. Fix help message for chgrp shell command (Raghu Angadi). + + HADOOP-1188. fstime file is updated when a storage directory containing + namespace image becomes inaccessible. (shv) + + HADOOP-2787. An application can set a configuration variable named + dfs.umask to set the umask that is used by DFS. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2780. The default socket buffer size for DataNodes is 128K. + (dhruba) + + HADOOP-2716. Superuser privileges for the Balancer. + (Tsz Wo (Nicholas), SZE via shv) + + HADOOP-2754. Filter out .crc files from local file system listing. + (Hairong Kuang via shv) + + HADOOP-2733. Fix compiler warnings in test code. + (Tsz Wo (Nicholas), SZE via cdouglas) + + HADOOP-2725. Modify distcp to avoid leaving partially copied files at + the destination after encountering an error. (Tsz Wo (Nicholas), SZE + via cdouglas) + + HADOOP-2391. Cleanup job output directory before declaring a job as + SUCCESSFUL. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2808. Minor fix to FileUtil::copy to mind the overwrite + formal. (cdouglas) + + HADOOP-2683. Moving UGI out of the RPC Server. + (Tsz Wo (Nicholas), SZE via shv) + + HADOOP-2814. Fix for NPE in datanode in unit test TestDataTransferProtocol. + (Raghu Angadi via dhruba) + + HADOOP-2811. Dump of counters in job history does not add comma between + groups. (runping via omalley) + + HADOOP-2735. Enables setting TMPDIR for tasks. + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2843. Fix protections on map-side join classes to enable derivation. + (cdouglas via omalley) + + HADOOP-2840. Fix gridmix scripts to correctly invoke the java sort through + the proper jar. (Mukund Madhugiri via cdouglas) + + HADOOP-2769. TestNNThroughputBnechmark should not use a fixed port for + the namenode http port. (omalley) + + HADOOP-2852. Update gridmix benchmark to avoid an artifically long tail. + (cdouglas) + + HADOOP-2894. Fix a problem to do with tasktrackers failing to connect to + JobTracker upon reinitialization. (Owen O'Malley via ddas). + + HADOOP-2903. Fix exception generated by Metrics while using pushMetric(). + (girish vaitheeswaran via dhruba) + + HADOOP-2904. Fix to RPC metrics to log the correct host name. + (girish vaitheeswaran via dhruba) + + HADOOP-2918. Improve error logging so that dfs writes failure with + "No lease on file" can be diagnosed. (dhruba) + + HADOOP-2923. Add SequenceFileAsBinaryInputFormat, which was + missed in the commit for HADOOP-2603. (cdouglas via omalley) + + HADOOP-2931. IOException thrown by DFSOutputStream had wrong stack + trace in some cases. (Michael Bieniosek via rangadi) + + HADOOP-2883. Write failures and data corruptions on HDFS files. + The write timeout is back to what it was on 0.15 release. Also, the + datnodes flushes the block file buffered output stream before + sending a positive ack for the packet back to the client. (dhruba) + + HADOOP-2756. NPE in DFSClient while closing DFSOutputStreams + under load. (rangadi) + + HADOOP-2958. Fixed FileBench which broke due to HADOOP-2391 which performs + a check for existence of the output directory and a trivial bug in + GenericMRLoadGenerator where min/max word lenghts were identical since + they were looking at the same config variables (Chris Douglas via + acmurthy) + + HADOOP-2915. Fixed FileSystem.CACHE so that a username is included + in the cache key. (Tsz Wo (Nicholas), SZE via nigel) + + HADOOP-2813. TestDU unit test uses its own directory to run its + sequence of tests. (Mahadev Konar via dhruba) + +Release 0.16.0 - 2008-02-07 + + INCOMPATIBLE CHANGES + + HADOOP-1245. Use the mapred.tasktracker.tasks.maximum value + configured on each tasktracker when allocating tasks, instead of + the value configured on the jobtracker. InterTrackerProtocol + version changed from 5 to 6. (Michael Bieniosek via omalley) + + HADOOP-1843. Removed code from Configuration and JobConf deprecated by + HADOOP-785 and a minor fix to Configuration.toString. Specifically the + important change is that mapred-default.xml is no longer supported and + Configuration no longer supports the notion of default/final resources. + (acmurthy) + + HADOOP-1302. Remove deprecated abacus code from the contrib directory. + This also fixes a configuration bug in AggregateWordCount, so that the + job now works. (enis) + + HADOOP-2288. Enhance FileSystem API to support access control. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2184. RPC Support for user permissions and authentication. + (Raghu Angadi via dhruba) + + HADOOP-2185. RPC Server uses any available port if the specified + port is zero. Otherwise it uses the specified port. Also combines + the configuration attributes for the servers' bind address and + port from "x.x.x.x" and "y" to "x.x.x.x:y". + Deprecated configuration variables: + dfs.info.bindAddress + dfs.info.port + dfs.datanode.bindAddress + dfs.datanode.port + dfs.datanode.info.bindAdress + dfs.datanode.info.port + dfs.secondary.info.bindAddress + dfs.secondary.info.port + mapred.job.tracker.info.bindAddress + mapred.job.tracker.info.port + mapred.task.tracker.report.bindAddress + tasktracker.http.bindAddress + tasktracker.http.port + New configuration variables (post HADOOP-2404): + dfs.secondary.http.address + dfs.datanode.address + dfs.datanode.http.address + dfs.http.address + mapred.job.tracker.http.address + mapred.task.tracker.report.address + mapred.task.tracker.http.address + (Konstantin Shvachko via dhruba) + + HADOOP-2401. Only the current leaseholder can abandon a block for + a HDFS file. ClientProtocol version changed from 20 to 21. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2381. Support permission information in FileStatus. Client + Protocol version changed from 21 to 22. (Raghu Angadi via dhruba) + + HADOOP-2110. Block report processing creates fewer transient objects. + Datanode Protocol version changed from 10 to 11. + (Sanjay Radia via dhruba) + + HADOOP-2567. Add FileSystem#getHomeDirectory(), which returns the + user's home directory in a FileSystem as a fully-qualified path. + FileSystem#getWorkingDirectory() is also changed to return a + fully-qualified path, which can break applications that attempt + to, e.g., pass LocalFileSystem#getWorkingDir().toString() directly + to java.io methods that accept file names. (cutting) + + HADOOP-2514. Change trash feature to maintain a per-user trash + directory, named ".Trash" in the user's home directory. The + "fs.trash.root" parameter is no longer used. Full source paths + are also no longer reproduced within the trash. + + HADOOP-2012. Periodic data verification on Datanodes. + (Raghu Angadi via dhruba) + + HADOOP-1707. The DFSClient does not use a local disk file to cache + writes to a HDFS file. Changed Data Transfer Version from 7 to 8. + (dhruba) + + HADOOP-2652. Fix permission issues for HftpFileSystem. This is an + incompatible change since distcp may not be able to copy files + from cluster A (compiled with this patch) to cluster B (compiled + with previous versions). (Tsz Wo (Nicholas), SZE via dhruba) + + NEW FEATURES + + HADOOP-1857. Ability to run a script when a task fails to capture stack + traces. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2299. Defination of a login interface. A simple implementation for + Unix users and groups. (Hairong Kuang via dhruba) + + HADOOP-1652. A utility to balance data among datanodes in a HDFS cluster. + (Hairong Kuang via dhruba) + + HADOOP-2085. A library to support map-side joins of consistently + partitioned and sorted data sets. (Chris Douglas via omalley) + + HADOOP-2336. Shell commands to modify file permissions. (rangadi) + + HADOOP-1298. Implement file permissions for HDFS. + (Tsz Wo (Nicholas) & taton via cutting) + + HADOOP-2447. HDFS can be configured to limit the total number of + objects (inodes and blocks) in the file system. (dhruba) + + HADOOP-2487. Added an option to get statuses for all submitted/run jobs. + This information can be used to develop tools for analysing jobs. + (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-1873. Implement user permissions for Map/Reduce framework. + (Hairong Kuang via shv) + + HADOOP-2532. Add to MapFile a getClosest method that returns the key + that comes just before if the key is not present. (stack via tomwhite) + + HADOOP-1883. Add versioning to Record I/O. (Vivek Ratan via ddas) + + HADOOP-2603. Add SeqeunceFileAsBinaryInputFormat, which reads + sequence files as BytesWritable/BytesWritable regardless of the + key and value types used to write the file. (cdouglas via omalley) + + HADOOP-2367. Add ability to profile a subset of map/reduce tasks and fetch + the result to the local filesystem of the submitting application. Also + includes a general IntegerRanges extension to Configuration for setting + positive, ranged parameters. (Owen O'Malley via cdouglas) + + IMPROVEMENTS + + HADOOP-2045. Change committer list on website to a table, so that + folks can list their organization, timezone, etc. (cutting) + + HADOOP-2058. Facilitate creating new datanodes dynamically in + MiniDFSCluster. (Hairong Kuang via dhruba) + + HADOOP-1855. fsck verifies block placement policies and reports + violations. (Konstantin Shvachko via dhruba) + + HADOOP-1604. An system administrator can finalize namenode upgrades + without running the cluster. (Konstantin Shvachko via dhruba) + + HADOOP-1839. Link-ify the Pending/Running/Complete/Killed grid in + jobdetails.jsp to help quickly narrow down and see categorized TIPs' + details via jobtasks.jsp. (Amar Kamat via acmurthy) + + HADOOP-1210. Log counters in job history. (Owen O'Malley via ddas) + + HADOOP-1912. Datanode has two new commands COPY and REPLACE. These are + needed for supporting data rebalance. (Hairong Kuang via dhruba) + + HADOOP-2086. This patch adds the ability to add dependencies to a job + (run via JobControl) after construction. (Adrian Woodhead via ddas) + + HADOOP-1185. Support changing the logging level of a server without + restarting the server. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2134. Remove developer-centric requirements from overview.html and + keep it end-user focussed, specifically sections related to subversion and + building Hadoop. (Jim Kellerman via acmurthy) + + HADOOP-1989. Support simulated DataNodes. This helps creating large virtual + clusters for testing purposes. (Sanjay Radia via dhruba) + + HADOOP-1274. Support different number of mappers and reducers per + TaskTracker to allow administrators to better configure and utilize + heterogenous clusters. + Configuration changes to hadoop-default.xml: + add mapred.tasktracker.map.tasks.maximum (default value of 2) + add mapred.tasktracker.reduce.tasks.maximum (default value of 2) + remove mapred.tasktracker.tasks.maximum (deprecated for 0.16.0) + (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-2104. Adds a description to the ant targets. This makes the + output of "ant -projecthelp" sensible. (Chris Douglas via ddas) + + HADOOP-2127. Added a pipes sort example to benchmark trivial pipes + application versus trivial java application. (omalley via acmurthy) + + HADOOP-2113. A new shell command "dfs -text" to view the contents of + a gziped or SequenceFile. (Chris Douglas via dhruba) + + HADOOP-2207. Add a "package" target for contrib modules that + permits each to determine what files are copied into release + builds. (stack via cutting) + + HADOOP-1984. Makes the backoff for failed fetches exponential. + Earlier, it was a random backoff from an interval. + (Amar Kamat via ddas) + + HADOOP-1327. Include website documentation for streaming. (Rob Weltman + via omalley) + + HADOOP-2000. Rewrite NNBench to measure namenode performance accurately. + It now uses the map-reduce framework for load generation. + (Mukund Madhugiri via dhruba) + + HADOOP-2248. Speeds up the framework w.r.t Counters. Also has API + updates to the Counters part. (Owen O'Malley via ddas) + + HADOOP-2326. The initial block report at Datanode startup time has + a random backoff period. (Sanjay Radia via dhruba) + + HADOOP-2432. HDFS includes the name of the file while throwing + "File does not exist" exception. (Jim Kellerman via dhruba) + + HADOOP-2457. Added a 'forrest.home' property to the 'docs' target in + build.xml. (acmurthy) + + HADOOP-2149. A new benchmark for three name-node operation: file create, + open, and block report, to evaluate the name-node performance + for optimizations or new features. (Konstantin Shvachko via shv) + + HADOOP-2466. Change FileInputFormat.computeSplitSize to a protected + non-static method to allow sub-classes to provide alternate + implementations. (Alejandro Abdelnur via acmurthy) + + HADOOP-2425. Change TextOutputFormat to handle Text specifically for better + performance. Make NullWritable implement Comparable. Make TextOutputFormat + treat NullWritable like null. (omalley) + + HADOOP-1719. Improves the utilization of shuffle copier threads. + (Amar Kamat via ddas) + + HADOOP-2390. Added documentation for user-controls for intermediate + map-outputs & final job-outputs and native-hadoop libraries. (acmurthy) + + HADOOP-1660. Add the cwd of the map/reduce task to the java.library.path + of the child-jvm to support loading of native libraries distributed via + the DistributedCache. (acmurthy) + + HADOOP-2285. Speeds up TextInputFormat. Also includes updates to the + Text API. (Owen O'Malley via cdouglas) + + HADOOP-2233. Adds a generic load generator for modeling MR jobs. (cdouglas) + + HADOOP-2369. Adds a set of scripts for simulating a mix of user map/reduce + workloads. (Runping Qi via cdouglas) + + HADOOP-2547. Removes use of a 'magic number' in build.xml. + (Hrishikesh via nigel) + + HADOOP-2268. Fix org.apache.hadoop.mapred.jobcontrol classes to use the + List/Map interfaces rather than concrete ArrayList/HashMap classes + internally. (Adrian Woodhead via acmurthy) + + HADOOP-2406. Add a benchmark for measuring read/write performance through + the InputFormat interface, particularly with compression. (cdouglas) + + HADOOP-2131. Allow finer-grained control over speculative-execution. Now + users can set it for maps and reduces independently. + Configuration changes to hadoop-default.xml: + deprecated mapred.speculative.execution + add mapred.map.tasks.speculative.execution + add mapred.reduce.tasks.speculative.execution + (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-1965. Interleave sort/spill in teh map-task along with calls to the + Mapper.map method. This is done by splitting the 'io.sort.mb' buffer into + two and using one half for collecting map-outputs and the other half for + sort/spill. (Amar Kamat via acmurthy) + + HADOOP-2464. Unit tests for chmod, chown, and chgrp using DFS. + (Raghu Angadi) + + HADOOP-1876. Persist statuses of completed jobs in HDFS so that the + JobClient can query and get information about decommissioned jobs and also + across JobTracker restarts. + Configuration changes to hadoop-default.xml: + add mapred.job.tracker.persist.jobstatus.active (default value of false) + add mapred.job.tracker.persist.jobstatus.hours (default value of 0) + add mapred.job.tracker.persist.jobstatus.dir (default value of + /jobtracker/jobsInfo) + (Alejandro Abdelnur via acmurthy) + + HADOOP-2077. Added version and build information to STARTUP_MSG for all + hadoop daemons to aid error-reporting, debugging etc. (acmurthy) + + HADOOP-2398. Additional instrumentation for NameNode and RPC server. + Add support for accessing instrumentation statistics via JMX. + (Sanjay radia via dhruba) + + HADOOP-2449. A return of the non-MR version of NNBench. + (Sanjay Radia via shv) + + HADOOP-1989. Remove 'datanodecluster' command from bin/hadoop. + (Sanjay Radia via shv) + + HADOOP-1742. Improve JavaDoc documentation for ClientProtocol, DFSClient, + and FSNamesystem. (Konstantin Shvachko) + + HADOOP-2298. Add Ant target for a binary-only distribution. + (Hrishikesh via nigel) + + HADOOP-2509. Add Ant target for Rat report (Apache license header + reports). (Hrishikesh via nigel) + + HADOOP-2469. WritableUtils.clone should take a Configuration + instead of a JobConf. (stack via omalley) + + HADOOP-2659. Introduce superuser permissions for admin operations. + (Tsz Wo (Nicholas), SZE via shv) + + HADOOP-2596. Added a SequenceFile.createWriter api which allows the user + to specify the blocksize, replication factor and the buffersize to be + used for the underlying HDFS file. (Alejandro Abdelnur via acmurthy) + + HADOOP-2431. Test HDFS File Permissions. (Hairong Kuang via shv) + + HADOOP-2232. Add an option to disable Nagle's algorithm in the IPC stack. + (Clint Morgan via cdouglas) + + HADOOP-2342. Created a micro-benchmark for measuring + local-file versus hdfs reads. (Owen O'Malley via nigel) + + HADOOP-2529. First version of HDFS User Guide. (Raghu Angadi) + + HADOOP-2690. Add jar-test target to build.xml, separating compilation + and packaging of the test classes. (Enis Soztutar via cdouglas) + + OPTIMIZATIONS + + HADOOP-1898. Release the lock protecting the last time of the last stack + dump while the dump is happening. (Amareshwari Sri Ramadasu via omalley) + + HADOOP-1900. Makes the heartbeat and task event queries interval + dependent on the cluster size. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2208. Counter update frequency (from TaskTracker to JobTracker) is + capped at 1 minute. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2284. Reduce the number of progress updates during the sorting in + the map task. (Amar Kamat via ddas) + + BUG FIXES + + HADOOP-2583. Fixes a bug in the Eclipse plug-in UI to edit locations. + Plug-in version is now synchronized with Hadoop version. + + HADOOP-2100. Remove faulty check for existence of $HADOOP_PID_DIR and let + 'mkdir -p' check & create it. (Michael Bieniosek via acmurthy) + + HADOOP-1642. Ensure jobids generated by LocalJobRunner are unique to + avoid collissions and hence job-failures. (Doug Cutting via acmurthy) + + HADOOP-2096. Close open file-descriptors held by streams while localizing + job.xml in the JobTracker and while displaying it on the webui in + jobconf.jsp. (Amar Kamat via acmurthy) + + HADOOP-2098. Log start & completion of empty jobs to JobHistory, which + also ensures that we close the file-descriptor of the job's history log + opened during job-submission. (Amar Kamat via acmurthy) + + HADOOP-2112. Adding back changes to build.xml lost while reverting + HADOOP-1622 i.e. http://svn.apache.org/viewvc?view=rev&revision=588771. + (acmurthy) + + HADOOP-2089. Fixes the command line argument handling to handle multiple + -cacheArchive in Hadoop streaming. (Lohit Vijayarenu via ddas) + + HADOOP-2071. Fix StreamXmlRecordReader to use a BufferedInputStream + wrapped over the DFSInputStream since mark/reset aren't supported by + DFSInputStream anymore. (Lohit Vijayarenu via acmurthy) + + HADOOP-1348. Allow XML comments inside configuration files. + (Rajagopal Natarajan and Enis Soztutar via enis) + + HADOOP-1952. Improve handling of invalid, user-specified classes while + configuring streaming jobs such as combiner, input/output formats etc. + Now invalid options are caught, logged and jobs are failed early. (Lohit + Vijayarenu via acmurthy) + + HADOOP-2151. FileSystem.globPaths validates the list of Paths that + it returns. (Lohit Vijayarenu via dhruba) + + HADOOP-2121. Cleanup DFSOutputStream when the stream encountered errors + when Datanodes became full. (Raghu Angadi via dhruba) + + HADOOP-1130. The FileSystem.closeAll() method closes all existing + DFSClients. (Chris Douglas via dhruba) + + HADOOP-2204. DFSTestUtil.waitReplication was not waiting for all replicas + to get created, thus causing unit test failure. + (Raghu Angadi via dhruba) + + HADOOP-2078. An zero size file may have no blocks associated with it. + (Konstantin Shvachko via dhruba) + + HADOOP-2212. ChecksumFileSystem.getSumBufferSize might throw + java.lang.ArithmeticException. The fix is to initialize bytesPerChecksum + to 0. (Michael Bieniosek via ddas) + + HADOOP-2216. Fix jobtasks.jsp to ensure that it first collects the + taskids which satisfy the filtering criteria and then use that list to + print out only the required task-reports, previously it was oblivious to + the filtering and hence used the wrong index into the array of task-reports. + (Amar Kamat via acmurthy) + + HADOOP-2272. Fix findbugs target to reflect changes made to the location + of the streaming jar file by HADOOP-2207. (Adrian Woodhead via nigel) + + HADOOP-2244. Fixes the MapWritable.readFields to clear the instance + field variable every time readFields is called. (Michael Stack via ddas). + + HADOOP-2245. Fixes LocalJobRunner to include a jobId in the mapId. Also, + adds a testcase for JobControl. (Adrian Woodhead via ddas). + + HADOOP-2275. Fix erroneous detection of corrupted file when namenode + fails to allocate any datanodes for newly allocated block. + (Dhruba Borthakur via dhruba) + + HADOOP-2256. Fix a buf in the namenode that could cause it to encounter + an infinite loop while deleting excess replicas that were created by + block rebalancing. (Hairong Kuang via dhruba) + + HADOOP-2209. SecondaryNamenode process exits if it encounters exceptions + that it cannot handle. (Dhruba Borthakur via dhruba) + + HADOOP-2314. Prevent TestBlockReplacement from occasionally getting + into an infinite loop. (Hairong Kuang via dhruba) + + HADOOP-2300. This fixes a bug where mapred.tasktracker.tasks.maximum + would be ignored even if it was set in hadoop-site.xml. + (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2349. Improve code layout in file system transaction logging code. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2368. Fix unit tests on Windows. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2363. This fix allows running multiple instances of the unit test + in parallel. The bug was introduced in HADOOP-2185 that changed + port-rolling behaviour. (Konstantin Shvachko via dhruba) + + HADOOP-2271. Fix chmod task to be non-parallel. (Adrian Woodhead via + omalley) + + HADOOP-2313. Fail the build if building libhdfs fails. (nigel via omalley) + + HADOOP-2359. Remove warning for interruptted exception when closing down + minidfs. (dhruba via omalley) + + HADOOP-1841. Prevent slow clients from consuming threads in the NameNode. + (dhruba) + + HADOOP-2323. JobTracker.close() should not print stack traces for + normal exit. (jimk via cutting) + + HADOOP-2376. Prevents sort example from overriding the number of maps. + (Owen O'Malley via ddas) + + HADOOP-2434. FSDatasetInterface read interface causes HDFS reads to occur + in 1 byte chunks, causing performance degradation. + (Raghu Angadi via dhruba) + + HADOOP-2459. Fix package target so that src/docs/build files are not + included in the release. (nigel) + + HADOOP-2215. Fix documentation in cluster_setup.html & + mapred_tutorial.html reflect that mapred.tasktracker.tasks.maximum has + been superceeded by mapred.tasktracker.{map|reduce}.tasks.maximum. + (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-2459. Fix package target so that src/docs/build files are not + included in the release. (nigel) + + HADOOP-2352. Remove AC_CHECK_LIB for libz and liblzo to ensure that + libhadoop.so doesn't have a dependency on them. (acmurthy) + + HADOOP-2453. Fix the configuration for wordcount-simple example in Hadoop + Pipes which currently produces an XML parsing error. (Amareshwari Sri + Ramadasu via acmurthy) + + HADOOP-2476. Unit test failure while reading permission bits of local + file system (on Windows) fixed. (Raghu Angadi via dhruba) + + HADOOP-2247. Fine-tune the strategies for killing mappers and reducers + due to failures while fetching map-outputs. Now the map-completion times + and number of currently running reduces are taken into account by the + JobTracker before killing the mappers, while the progress made by the + reducer and the number of fetch-failures vis-a-vis total number of + fetch-attempts are taken into account before teh reducer kills itself. + (Amar Kamat via acmurthy) + + HADOOP-2452. Fix eclipse plug-in build.xml to refers to the right + location where hadoop-*-core.jar is generated. (taton) + + HADOOP-2492. Additional debugging in the rpc server to better + diagnose ConcurrentModificationException. (dhruba) + + HADOOP-2344. Enhance the utility for executing shell commands to read the + stdout/stderr streams while waiting for the command to finish (to free up + the buffers). Also, this patch throws away stderr of the DF utility. + @deprecated + org.apache.hadoop.fs.ShellCommand for org.apache.hadoop.util.Shell + org.apache.hadoop.util.ShellUtil for + org.apache.hadoop.util.Shell.ShellCommandExecutor + (Amar Kamat via acmurthy) + + HADOOP-2511. Fix a javadoc warning in org.apache.hadoop.util.Shell + introduced by HADOOP-2344. (acmurthy) + + HADOOP-2442. Fix TestLocalFileSystemPermission.testLocalFSsetOwner + to work on more platforms. (Raghu Angadi via nigel) + + HADOOP-2488. Fix a regression in random read performance. + (Michael Stack via rangadi) + + HADOOP-2523. Fix TestDFSShell.testFilePermissions on Windows. + (Raghu Angadi via nigel) + + HADOOP-2535. Removed support for deprecated mapred.child.heap.size and + fixed some indentation issues in TaskRunner. (acmurthy) + Configuration changes to hadoop-default.xml: + remove mapred.child.heap.size + + HADOOP-2512. Fix error stream handling in Shell. Use exit code to + detect shell command errors in RawLocalFileSystem. (Raghu Angadi) + + HADOOP-2446. Fixes TestHDFSServerPorts and TestMRServerPorts so they + do not rely on statically configured ports and cleanup better. (nigel) + + HADOOP-2537. Make build process compatible with Ant 1.7.0. + (Hrishikesh via nigel) + + HADOOP-1281. Ensure running tasks of completed map TIPs (e.g. speculative + tasks) are killed as soon as the TIP completed. (acmurthy) + + HADOOP-2571. Suppress a suprious warning in test code. (cdouglas) + + HADOOP-2481. NNBench report its progress periodically. + (Hairong Kuang via dhruba) + + HADOOP-2601. Start name-node on a free port for TestNNThroughputBenchmark. + (Konstantin Shvachko) + + HADOOP-2494. Set +x on contrib/*/bin/* in packaged tar bundle. + (stack via tomwhite) + + HADOOP-2605. Remove bogus leading slash in task-tracker report bindAddress. + (Konstantin Shvachko) + + HADOOP-2620. Trivial. 'bin/hadoop fs -help' did not list chmod, chown, and + chgrp. (Raghu Angadi) + + HADOOP-2614. The DFS WebUI accesses are configured to be from the user + specified by dfs.web.ugi. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2543. Implement a "no-permission-checking" mode for smooth + upgrade from a pre-0.16 install of HDFS. + (Hairong Kuang via dhruba) + + HADOOP-290. A DataNode log message now prints the target of a replication + request correctly. (dhruba) + + HADOOP-2538. Redirect to a warning, if plaintext parameter is true but + the filter parameter is not given in TaskLogServlet. + (Michael Bieniosek via enis) + + HADOOP-2582. Prevent 'bin/hadoop fs -copyToLocal' from creating + zero-length files when the src does not exist. + (Lohit Vijayarenu via cdouglas) + + HADOOP-2189. Incrementing user counters should count as progress. (ddas) + + HADOOP-2649. The NameNode periodically computes replication work for + the datanodes. The periodicity of this computation is now configurable. + (dhruba) + + HADOOP-2549. Correct disk size computation so that data-nodes could switch + to other local drives if current is full. (Hairong Kuang via shv) + + HADOOP-2633. Fsck should call name-node methods directly rather than + through rpc. (Tsz Wo (Nicholas), SZE via shv) + + HADOOP-2687. Modify a few log message generated by dfs client to be + logged only at INFO level. (stack via dhruba) + + HADOOP-2402. Fix BlockCompressorStream to ensure it buffers data before + sending it down to the compressor so that each write call doesn't + compress. (Chris Douglas via acmurthy) + + HADOOP-2645. The Metrics initialization code does not throw + exceptions when servers are restarted by MiniDFSCluster. + (Sanjay Radia via dhruba) + + HADOOP-2691. Fix a race condition that was causing the DFSClient + to erroneously remove a good datanode from a pipeline that actually + had another datanode that was bad. (dhruba) + + HADOOP-1195. All code in FSNamesystem checks the return value + of getDataNode for null before using it. (dhruba) + + HADOOP-2640. Fix a bug in MultiFileSplitInputFormat that was always + returning 1 split in some circumstances. (Enis Soztutar via nigel) + + HADOOP-2626. Fix paths with special characters to work correctly + with the local filesystem. (Thomas Friol via cutting) + + HADOOP-2646. Fix SortValidator to work with fully-qualified + working directories. (Arun C Murthy via nigel) + + HADOOP-2092. Added a ping mechanism to the pipes' task to periodically + check if the parent Java task is running, and exit if the parent isn't + alive and responding. (Amareshwari Sri Ramadasu via acmurthy) + + HADOOP-2714. TestDecommission failed on windows because the replication + request was timing out. (dhruba) + + HADOOP-2576. Namenode performance degradation over time triggered by + large heartbeat interval. (Raghu Angadi) + + HADOOP-2713. TestDatanodeDeath failed on windows because the replication + request was timing out. (dhruba) + + HADOOP-2639. Fixes a problem to do with incorrect maintenance of values + for runningMapTasks/runningReduceTasks. (Amar Kamat and Arun Murthy + via ddas) + + HADOOP-2723. Fixed the check for checking whether to do user task + profiling. (Amareshwari Sri Ramadasu via omalley) + + HADOOP-2734. Link forrest docs to new http://hadoop.apache.org + (Doug Cutting via nigel) + + HADOOP-2641. Added Apache license headers to 95 files. (nigel) + + HADOOP-2732. Fix bug in path globbing. (Hairong Kuang via nigel) + + HADOOP-2404. Fix backwards compatability with hadoop-0.15 configuration + files that was broken by HADOOP-2185. (omalley) + + HADOOP-2755. Fix fsck performance degradation because of permissions + issue. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-2768. Fix performance regression caused by HADOOP-1707. + (dhruba borthakur via nigel) + + HADOOP-3108. Fix NPE in setPermission and setOwner. (shv) + +Release 0.15.3 - 2008-01-18 + + BUG FIXES + + HADOOP-2562. globPaths supports {ab,cd}. (Hairong Kuang via dhruba) + + HADOOP-2540. fsck reports missing blocks incorrectly. (dhruba) + + HADOOP-2570. "work" directory created unconditionally, and symlinks + created from the task cwds. + + HADOOP-2574. Fixed mapred_tutorial.xml to correct minor errors with the + WordCount examples. (acmurthy) + +Release 0.15.2 - 2008-01-02 + + BUG FIXES + + HADOOP-2246. Moved the changelog for HADOOP-1851 from the NEW FEATURES + section to the INCOMPATIBLE CHANGES section. (acmurthy) + + HADOOP-2238. Fix TaskGraphServlet so that it sets the content type of + the response appropriately. (Paul Saab via enis) + + HADOOP-2129. Fix so that distcp works correctly when source is + HDFS but not the default filesystem. HDFS paths returned by the + listStatus() method are now fully-qualified. (cutting) + + HADOOP-2378. Fixes a problem where the last task completion event would + get created after the job completes. (Alejandro Abdelnur via ddas) + + HADOOP-2228. Checks whether a job with a certain jobId is already running + and then tries to create the JobInProgress object. + (Johan Oskarsson via ddas) + + HADOOP-2422. dfs -cat multiple files fail with 'Unable to write to + output stream'. (Raghu Angadi via dhruba) + + HADOOP-2460. When the namenode encounters ioerrors on writing a + transaction log, it stops writing new transactions to that one. + (Raghu Angadi via dhruba) + + HADOOP-2227. Use the LocalDirAllocator uniformly for handling all of the + temporary storage required for a given task. It also implies that + mapred.local.dir.minspacestart is handled by checking if there is enough + free-space on any one of the available disks. (Amareshwari Sri Ramadasu + via acmurthy) + + HADOOP-2437. Fix the LocalDirAllocator to choose the seed for the + round-robin disk selections randomly. This helps in spreading data across + multiple partitions much better. (acmurhty) + + HADOOP-2486. When the list of files from the InMemoryFileSystem is obtained + for merging, this patch will ensure that only those files whose checksums + have also got created (renamed) are returned. (ddas) + + HADOOP-2456. Hardcode English locale to prevent NumberFormatException + from occurring when starting the NameNode with certain locales. + (Matthias Friedrich via nigel) + + IMPROVEMENTS + + HADOOP-2160. Remove project-level, non-user documentation from + releases, since it's now maintained in a separate tree. (cutting) + + HADOOP-1327. Add user documentation for streaming. (cutting) + + HADOOP-2382. Add hadoop-default.html to subversion. (cutting) + + HADOOP-2158. hdfsListDirectory calls FileSystem.listStatus instead + of FileSystem.listPaths. This reduces the number of RPC calls on the + namenode, thereby improving scalability. (Christian Kunz via dhruba) + +Release 0.15.1 - 2007-11-27 + + INCOMPATIBLE CHANGES + + HADOOP-713. Reduce CPU usage on namenode while listing directories. + FileSystem.listPaths does not return the size of the entire subtree. + Introduced a new API ClientProtocol.getContentLength that returns the + size of the subtree. (Dhruba Borthakur via dhruba) + + IMPROVEMENTS + + HADOOP-1917. Addition of guides/tutorial for better overall + documentation for Hadoop. Specifically: + * quickstart.html is targetted towards first-time users and helps them + setup a single-node cluster and play with Hadoop. + * cluster_setup.html helps admins to configure and setup non-trivial + hadoop clusters. + * mapred_tutorial.html is a comprehensive Map-Reduce tutorial. + (acmurthy) + + BUG FIXES + + HADOOP-2174. Removed the unnecessary Reporter.setStatus call from + FSCopyFilesMapper.close which led to a NPE since the reporter isn't valid + in the close method. (Chris Douglas via acmurthy) + + HADOOP-2172. Restore performance of random access to local files + by caching positions of local input streams, avoiding a system + call. (cutting) + + HADOOP-2205. Regenerate the Hadoop website since some of the changes made + by HADOOP-1917 weren't correctly copied over to the trunk/docs directory. + Also fixed a couple of minor typos and broken links. (acmurthy) + +Release 0.15.0 - 2007-11-2 + + INCOMPATIBLE CHANGES + + HADOOP-1708. Make files appear in namespace as soon as they are + created. (Dhruba Borthakur via dhruba) + + HADOOP-999. A HDFS Client immediately informs the NameNode of a new + file creation. ClientProtocol version changed from 14 to 15. + (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-932. File locking interfaces and implementations (that were + earlier deprecated) are removed. Client Protocol version changed + from 15 to 16. (Raghu Angadi via dhruba) + + HADOOP-1621. FileStatus is now a concrete class and FileSystem.listPaths + is deprecated and replaced with listStatus. (Chris Douglas via omalley) + + HADOOP-1656. The blockSize of a file is stored persistently in the file + inode. (Dhruba Borthakur via dhruba) + + HADOOP-1838. The blocksize of files created with an earlier release is + set to the default block size. (Dhruba Borthakur via dhruba) + + HADOOP-785. Add support for 'final' Configuration parameters, + removing support for 'mapred-default.xml', and changing + 'hadoop-site.xml' to not override other files. Now folks should + generally use 'hadoop-site.xml' for all configurations. Values + with a 'final' tag may not be overridden by subsequently loaded + configuration files, e.g., by jobs. (Arun C. Murthy via cutting) + + HADOOP-1846. DatanodeReport in ClientProtocol can report live + datanodes, dead datanodes or all datanodes. Client Protocol version + changed from 17 to 18. (Hairong Kuang via dhruba) + + HADOOP-1851. Permit specification of map output compression type + and codec, independent of the final output's compression + parameters. (Arun C Murthy via cutting) + + HADOOP-1819. Jobtracker cleanups, including binding ports before + clearing state directories, so that inadvertently starting a + second jobtracker doesn't trash one that's already running. Removed + method JobTracker.getTracker() because the static variable, which + stored the value caused initialization problems. + (omalley via cutting) + + NEW FEATURES + + HADOOP-89. A client can access file data even before the creator + has closed the file. Introduce a new command "tail" from dfs shell. + (Dhruba Borthakur via dhruba) + + HADOOP-1636. Allow configuration of the number of jobs kept in + memory by the JobTracker. (Michael Bieniosek via omalley) + + HADOOP-1667. Reorganize CHANGES.txt into sections to make it + easier to read. Also remove numbering, to make merging easier. + (cutting) + + HADOOP-1610. Add metrics for failed tasks. + (Devaraj Das via tomwhite) + + HADOOP-1767. Add "bin/hadoop job -list" sub-command. (taton via cutting) + + HADOOP-1351. Add "bin/hadoop job [-fail-task|-kill-task]" sub-commands + to terminate a particular task-attempt. (Enis Soztutar via acmurthy) + + HADOOP-1880. SleepJob : An example job that sleeps at each map and + reduce task. (enis) + + HADOOP-1809. Add a link in web site to #hadoop IRC channel. (enis) + + HADOOP-1894. Add percentage graphs and mapred task completion graphs + to Web User Interface. Users not using Firefox may install a plugin to + their browsers to see svg graphics. (enis) + + HADOOP-1914. Introduce a new NamenodeProtocol to allow secondary + namenodes and rebalancing processes to communicate with a primary + namenode. (Hairong Kuang via dhruba) + + HADOOP-1963. Add a FileSystem implementation for the Kosmos + Filesystem (KFS). (Sriram Rao via cutting) + + HADOOP-1822. Allow the specialization and configuration of socket + factories. Provide a StandardSocketFactory, and a SocksSocketFactory to + allow the use of SOCKS proxies. (taton). + + HADOOP-1968. FileSystem supports wildcard input syntax "{ }". + (Hairong Kuang via dhruba) + + HADOOP-2566. Add globStatus method to the FileSystem interface + and deprecate globPath and listPath. (Hairong Kuang via hairong) + + OPTIMIZATIONS + + HADOOP-1910. Reduce the number of RPCs that DistributedFileSystem.create() + makes to the namenode. (Raghu Angadi via dhruba) + + HADOOP-1565. Reduce memory usage of NameNode by replacing + TreeMap in HDFS Namespace with ArrayList. + (Dhruba Borthakur via dhruba) + + HADOOP-1743. Change DFS INode from a nested class to standalone + class, with specialized subclasses for directories and files, to + save memory on the namenode. (Konstantin Shvachko via cutting) + + HADOOP-1759. Change file name in INode from String to byte[], + saving memory on the namenode. (Konstantin Shvachko via cutting) + + HADOOP-1766. Save memory in namenode by having BlockInfo extend + Block, and replace many uses of Block with BlockInfo. + (Konstantin Shvachko via cutting) + + HADOOP-1687. Save memory in namenode by optimizing BlockMap + representation. (Konstantin Shvachko via cutting) + + HADOOP-1774. Remove use of INode.parent in Block CRC upgrade. + (Raghu Angadi via dhruba) + + HADOOP-1788. Increase the buffer size on the Pipes command socket. + (Amareshwari Sri Ramadasu and Christian Kunz via omalley) + + BUG FIXES + + HADOOP-1946. The Datanode code does not need to invoke du on + every heartbeat. (Hairong Kuang via dhruba) + + HADOOP-1935. Fix a NullPointerException in internalReleaseCreate. + (Dhruba Borthakur) + + HADOOP-1933. The nodes listed in include and exclude files + are always listed in the datanode report. + (Raghu Angadi via dhruba) + + HADOOP-1953. The job tracker should wait beteween calls to try and delete + the system directory (Owen O'Malley via devaraj) + + HADOOP-1932. TestFileCreation fails with message saying filestatus.dat + is of incorrect size. (Dhruba Borthakur via dhruba) + + HADOOP-1573. Support for 0 reducers in PIPES. + (Owen O'Malley via devaraj) + + HADOOP-1500. Fix typographical errors in the DFS WebUI. + (Nigel Daley via dhruba) + + HADOOP-1076. Periodic checkpoint can continue even if an earlier + checkpoint encountered an error. (Dhruba Borthakur via dhruba) + + HADOOP-1887. The Namenode encounters an ArrayIndexOutOfBoundsException + while listing a directory that had a file that was + being actively written to. (Dhruba Borthakur via dhruba) + + HADOOP-1904. The Namenode encounters an exception because the + list of blocks per datanode-descriptor was corrupted. + (Konstantin Shvachko via dhruba) + + HADOOP-1762. The Namenode fsimage does not contain a list of + Datanodes. (Raghu Angadi via dhruba) + + HADOOP-1890. Removed debugging prints introduced by HADOOP-1774. + (Raghu Angadi via dhruba) + + HADOOP-1763. Too many lost task trackers on large clusters due to + insufficient number of RPC handler threads on the JobTracker. + (Devaraj Das) + + HADOOP-1463. HDFS report correct usage statistics for disk space + used by HDFS. (Hairong Kuang via dhruba) + + HADOOP-1692. In DFS ant task, don't cache the Configuration. + (Chris Douglas via cutting) + + HADOOP-1726. Remove lib/jetty-ext/ant.jar. (omalley) + + HADOOP-1772. Fix hadoop-daemon.sh script to get correct hostname + under Cygwin. (Tsz Wo (Nicholas), SZE via cutting) + + HADOOP-1749. Change TestDFSUpgrade to sort files, fixing sporadic + test failures. (Enis Soztutar via cutting) + + HADOOP-1748. Fix tasktracker to be able to launch tasks when log + directory is relative. (omalley via cutting) + + HADOOP-1775. Fix a NullPointerException and an + IllegalArgumentException in MapWritable. + (Jim Kellerman via cutting) + + HADOOP-1795. Fix so that jobs can generate output file names with + special characters. (Fr??d??ric Bertin via cutting) + + HADOOP-1810. Fix incorrect value type in MRBench (SmallJobs) + (Devaraj Das via tomwhite) + + HADOOP-1806. Fix ant task to compile again, also fix default + builds to compile ant tasks. (Chris Douglas via cutting) + + HADOOP-1758. Fix escape processing in librecordio to not be + quadratic. (Vivek Ratan via cutting) + + HADOOP-1817. Fix MultiFileSplit to read and write the split + length, so that it is not always zero in map tasks. + (Thomas Friol via cutting) + + HADOOP-1853. Fix contrib/streaming to accept multiple -cacheFile + options. (Prachi Gupta via cutting) + + HADOOP-1818. Fix MultiFileInputFormat so that it does not return + empty splits when numPaths < numSplits. (Thomas Friol via enis) + + HADOOP-1840. Fix race condition which leads to task's diagnostic + messages getting lost. (acmurthy) + + HADOOP-1885. Fix race condition in MiniDFSCluster shutdown. + (Chris Douglas via nigel) + + HADOOP-1889. Fix path in EC2 scripts for building your own AMI. + (tomwhite) + + HADOOP-1892. Fix a NullPointerException in the JobTracker when + trying to fetch a task's diagnostic messages from the JobClient. + (Amar Kamat via acmurthy) + + HADOOP-1897. Completely remove about.html page from the web site. + (enis) + + HADOOP-1907. Fix null pointer exception when getting task diagnostics + in JobClient. (Christian Kunz via omalley) + + HADOOP-1882. Remove spurious asterisks from decimal number displays. + (Raghu Angadi via cutting) + + HADOOP-1783. Make S3 FileSystem return Paths fully-qualified with + scheme and host. (tomwhite) + + HADOOP-1925. Make pipes' autoconf script look for libsocket and libnsl, so + that it can compile under Solaris. (omalley) + + HADOOP-1940. TestDFSUpgradeFromImage must shut down its MiniDFSCluster. + (Chris Douglas via nigel) + + HADOOP-1930. Fix the blame for failed fetchs on the right host. (Arun C. + Murthy via omalley) + + HADOOP-1934. Fix the platform name on Mac to use underscores rather than + spaces. (omalley) + + HADOOP-1959. Use "/" instead of File.separator in the StatusHttpServer. + (jimk via omalley) + + HADOOP-1626. Improve dfsadmin help messages. + (Lohit Vijayarenu via dhruba) + + HADOOP-1695. The SecondaryNamenode waits for the Primary NameNode to + start up. (Dhruba Borthakur) + + HADOOP-1983. Have Pipes flush the command socket when progress is sent + to prevent timeouts during long computations. (omalley) + + HADOOP-1875. Non-existant directories or read-only directories are + filtered from dfs.client.buffer.dir. (Hairong Kuang via dhruba) + + HADOOP-1992. Fix the performance degradation in the sort validator. + (acmurthy via omalley) + + HADOOP-1874. Move task-outputs' promotion/discard to a separate thread + distinct from the main heartbeat-processing thread. The main upside being + that we do not lock-up the JobTracker during HDFS operations, which + otherwise may lead to lost tasktrackers if the NameNode is unresponsive. + (Devaraj Das via acmurthy) + + HADOOP-2026. Namenode prints out one log line for "Number of transactions" + at most once every minute. (Dhruba Borthakur) + + HADOOP-2022. Ensure that status information for successful tasks is correctly + recorded at the JobTracker, so that, for example, one may view correct + information via taskdetails.jsp. This bug was introduced by HADOOP-1874. + (Amar Kamat via acmurthy) + + HADOOP-2031. Correctly maintain the taskid which takes the TIP to + completion, failing which the case of lost tasktrackers isn't handled + properly i.e. the map TIP is incorrectly left marked as 'complete' and it + is never rescheduled elsewhere, leading to hung reduces. + (Devaraj Das via acmurthy) + + HADOOP-2018. The source datanode of a data transfer waits for + a response from the target datanode before closing the data stream. + (Hairong Kuang via dhruba) + + HADOOP-2023. Disable TestLocalDirAllocator on Windows. + (Hairong Kuang via nigel) + + HADOOP-2016. Ignore status-updates from FAILED/KILLED tasks at the + TaskTracker. This fixes a race-condition which caused the tasks to wrongly + remain in the RUNNING state even after being killed by the JobTracker and + thus handicap the cleanup of the task's output sub-directory. (acmurthy) + + HADOOP-1771. Fix a NullPointerException in streaming caused by an + IOException in MROutputThread. (lohit vijayarenu via nigel) + + HADOOP-2028. Fix distcp so that the log dir does not need to be + specified and the destination does not need to exist. + (Chris Douglas via nigel) + + HADOOP-2044. The namenode protects all lease manipulations using a + sortedLease lock. (Dhruba Borthakur) + + HADOOP-2051. The TaskCommit thread should not die for exceptions other + than the InterruptedException. This behavior is there for the other long + running threads in the JobTracker. (Arun C Murthy via ddas) + + HADOOP-1973. The FileSystem object would be accessed on the JobTracker + through a RPC in the InterTrackerProtocol. The check for the object being + null was missing and hence NPE would be thrown sometimes. This issue fixes + that problem. (Amareshwari Sri Ramadasu via ddas) + + HADOOP-2033. The SequenceFile.Writer.sync method was a no-op, which caused + very uneven splits for applications like distcp that count on them. + (omalley) + + HADOOP-2070. Added a flush method to pipes' DownwardProtocol and call + that before waiting for the application to finish to ensure all buffered + data is flushed. (Owen O'Malley via acmurthy) + + HADOOP-2080. Fixed calculation of the checksum file size when the values + are large. (omalley) + + HADOOP-2048. Change error handling in distcp so that each map copies + as much as possible before reporting the error. Also report progress on + every copy. (Chris Douglas via omalley) + + HADOOP-2073. Change size of VERSION file after writing contents to it. + (Konstantin Shvachko via dhruba) + + HADOOP-2102. Fix the deprecated ToolBase to pass its Configuration object + to the superceding ToolRunner to ensure it picks up the appropriate + configuration resources. (Dennis Kubes and Enis Soztutar via acmurthy) + + HADOOP-2103. Fix minor javadoc bugs introduce by HADOOP-2046. (Nigel + Daley via acmurthy) + + IMPROVEMENTS + + HADOOP-1908. Restructure data node code so that block sending and + receiving are seperated from data transfer header handling. + (Hairong Kuang via dhruba) + + HADOOP-1921. Save the configuration of completed/failed jobs and make them + available via the web-ui. (Amar Kamat via devaraj) + + HADOOP-1266. Remove dependency of package org.apache.hadoop.net on + org.apache.hadoop.dfs. (Hairong Kuang via dhruba) + + HADOOP-1779. Replace INodeDirectory.getINode() by a getExistingPathINodes() + to allow the retrieval of all existing INodes along a given path in a + single lookup. This facilitates removal of the 'parent' field in the + inode. (Christophe Taton via dhruba) + + HADOOP-1756. Add toString() to some Writable-s. (ab) + + HADOOP-1727. New classes: MapWritable and SortedMapWritable. + (Jim Kellerman via ab) + + HADOOP-1651. Improve progress reporting. + (Devaraj Das via tomwhite) + + HADOOP-1595. dfsshell can wait for a file to achieve its intended + replication target. (Tsz Wo (Nicholas), SZE via dhruba) + + HADOOP-1693. Remove un-needed log fields in DFS replication classes, + since the log may be accessed statically. (Konstantin Shvachko via cutting) + + HADOOP-1231. Add generics to Mapper and Reducer interfaces. + (tomwhite via cutting) + + HADOOP-1436. Improved command-line APIs, so that all tools need + not subclass ToolBase, and generic parameter parser is public. + (Enis Soztutar via cutting) + + HADOOP-1703. DFS-internal code cleanups, removing several uses of + the obsolete UTF8. (Christophe Taton via cutting) + + HADOOP-1731. Add Hadoop's version to contrib jar file names. + (cutting) + + HADOOP-1689. Make shell scripts more portable. All shell scripts + now explicitly depend on bash, but do not require that bash be + installed in a particular location, as long as it is on $PATH. + (cutting) + + HADOOP-1744. Remove many uses of the deprecated UTF8 class from + the HDFS namenode. (Christophe Taton via cutting) + + HADOOP-1654. Add IOUtils class, containing generic io-related + utility methods. (Enis Soztutar via cutting) + + HADOOP-1158. Change JobTracker to record map-output transmission + errors and use them to trigger speculative re-execution of tasks. + (Arun C Murthy via cutting) + + HADOOP-1601. Change GenericWritable to use ReflectionUtils for + instance creation, avoiding classloader issues, and to implement + Configurable. (Enis Soztutar via cutting) + + HADOOP-1750. Log standard output and standard error when forking + task processes. (omalley via cutting) + + HADOOP-1803. Generalize build.xml to make files in all + src/contrib/*/bin directories executable. (stack via cutting) + + HADOOP-1739. Let OS always choose the tasktracker's umbilical + port. Also switch default address for umbilical connections to + loopback. (cutting) + + HADOOP-1812. Let OS choose ports for IPC and RPC unit tests. (cutting) + + HADOOP-1825. Create $HADOOP_PID_DIR when it does not exist. + (Michael Bieniosek via cutting) + + HADOOP-1425. Replace uses of ToolBase with the Tool interface. + (Enis Soztutar via cutting) + + HADOOP-1569. Reimplement DistCP to use the standard FileSystem/URI + code in Hadoop so that you can copy from and to all of the supported file + systems.(Chris Douglas via omalley) + + HADOOP-1018. Improve documentation w.r.t handling of lost hearbeats between + TaskTrackers and JobTracker. (acmurthy) + + HADOOP-1718. Add ant targets for measuring code coverage with clover. + (simonwillnauer via nigel) + + HADOOP-1592. Log error messages to the client console when tasks + fail. (Amar Kamat via cutting) + + HADOOP-1879. Remove some unneeded casts. (Nilay Vaish via cutting) + + HADOOP-1878. Add space between priority links on job details + page. (Thomas Friol via cutting) + + HADOOP-120. In ArrayWritable, prevent creation with null value + class, and improve documentation. (Cameron Pope via cutting) + + HADOOP-1926. Add a random text writer example/benchmark so that we can + benchmark compression codecs on random data. (acmurthy via omalley) + + HADOOP-1906. Warn the user if they have an obsolete madred-default.xml + file in their configuration directory. (acmurthy via omalley) + + HADOOP-1971. Warn when job does not specify a jar. (enis via cutting) + + HADOOP-1942. Increase the concurrency of transaction logging to + edits log. Reduce the number of syncs by double-buffering the changes + to the transaction log. (Dhruba Borthakur) + + HADOOP-2046. Improve mapred javadoc. (Arun C. Murthy via cutting) + + HADOOP-2105. Improve overview.html to clarify supported platforms, + software pre-requisites for hadoop, how to install them on various + platforms and a better general description of hadoop and it's utility. + (Jim Kellerman via acmurthy) + + +Release 0.14.4 - 2007-11-26 + + BUG FIXES + + HADOOP-2140. Add missing Apache Licensing text at the front of several + C and C++ files. + + HADOOP-2169. Fix the DT_SONAME field of libhdfs.so to set it to the + correct value of 'libhdfs.so', currently it is set to the absolute path of + libhdfs.so. (acmurthy) + + HADOOP-2001. Make the job priority updates and job kills synchronized on + the JobTracker. Deadlock was seen in the JobTracker because of the lack of + this synchronization. (Arun C Murthy via ddas) + + +Release 0.14.3 - 2007-10-19 + + BUG FIXES + + HADOOP-2053. Fixed a dangling reference to a memory buffer in the map + output sorter. (acmurthy via omalley) + + HADOOP-2036. Fix a NullPointerException in JvmMetrics class. (nigel) + + HADOOP-2043. Release 0.14.2 was compiled with Java 1.6 rather than + Java 1.5. (cutting) + + +Release 0.14.2 - 2007-10-09 + + BUG FIXES + + HADOOP-1948. Removed spurious error message during block crc upgrade. + (Raghu Angadi via dhruba) + + HADOOP-1862. reduces are getting stuck trying to find map outputs. + (Arun C. Murthy via ddas) + + HADOOP-1977. Fixed handling of ToolBase cli options in JobClient. + (enis via omalley) + + HADOOP-1972. Fix LzoCompressor to ensure the user has actually asked + to finish compression. (arun via omalley) + + HADOOP-1970. Fix deadlock in progress reporting in the task. (Vivek + Ratan via omalley) + + HADOOP-1978. Name-node removes edits.new after a successful startup. + (Konstantin Shvachko via dhruba) + + HADOOP-1955. The Namenode tries to not pick the same source Datanode for + a replication request if the earlier replication request for the same + block and that source Datanode had failed. + (Raghu Angadi via dhruba) + + HADOOP-1961. The -get option to dfs-shell works when a single filename + is specified. (Raghu Angadi via dhruba) + + HADOOP-1997. TestCheckpoint closes the edits file after writing to it, + otherwise the rename of this file on Windows fails. + (Konstantin Shvachko via dhruba) + +Release 0.14.1 - 2007-09-04 + + BUG FIXES + + HADOOP-1740. Fix null pointer exception in sorting map outputs. (Devaraj + Das via omalley) + + HADOOP-1790. Fix tasktracker to work correctly on multi-homed + boxes. (Torsten Curdt via cutting) + + HADOOP-1798. Fix jobtracker to correctly account for failed + tasks. (omalley via cutting) + + +Release 0.14.0 - 2007-08-17 + + INCOMPATIBLE CHANGES + + 1. HADOOP-1134. + CONFIG/API - dfs.block.size must now be a multiple of + io.byte.per.checksum, otherwise new files can not be written. + LAYOUT - DFS layout version changed from -6 to -7, which will require an + upgrade from previous versions. + PROTOCOL - Datanode RPC protocol version changed from 7 to 8. + + 2. HADOOP-1283 + API - deprecated file locking API. + + 3. HADOOP-894 + PROTOCOL - changed ClientProtocol to fetch parts of block locations. + + 4. HADOOP-1336 + CONFIG - Enable speculative execution by default. + + 5. HADOOP-1197 + API - deprecated method for Configuration.getObject, because + Configurations should only contain strings. + + 6. HADOOP-1343 + API - deprecate Configuration.set(String,Object) so that only strings are + put in Configrations. + + 7. HADOOP-1207 + CLI - Fix FsShell 'rm' command to continue when a non-existent file is + encountered. + + 8. HADOOP-1473 + CLI/API - Job, TIP, and Task id formats have changed and are now unique + across job tracker restarts. + + 9. HADOOP-1400 + API - JobClient constructor now takes a JobConf object instead of a + Configuration object. + + NEW FEATURES and BUG FIXES + + 1. HADOOP-1197. In Configuration, deprecate getObject() and add + getRaw(), which skips variable expansion. (omalley via cutting) + + 2. HADOOP-1343. In Configuration, deprecate set(String,Object) and + implement Iterable. (omalley via cutting) + + 3. HADOOP-1344. Add RunningJob#getJobName(). (Michael Bieniosek via cutting) + + 4. HADOOP-1342. In aggregators, permit one to limit the number of + unique values per key. (Runping Qi via cutting) + + 5. HADOOP-1340. Set the replication factor of the MD5 file in the filecache + to be the same as the replication factor of the original file. + (Dhruba Borthakur via tomwhite.) + + 6. HADOOP-1355. Fix null pointer dereference in + TaskLogAppender.append(LoggingEvent). (Arun C Murthy via tomwhite.) + + 7. HADOOP-1357. Fix CopyFiles to correctly avoid removing "/". + (Arun C Murthy via cutting) + + 8. HADOOP-234. Add pipes facility, which permits writing MapReduce + programs in C++. + + 9. HADOOP-1359. Fix a potential NullPointerException in HDFS. + (Hairong Kuang via cutting) + + 10. HADOOP-1364. Fix inconsistent synchronization in SequenceFile. + (omalley via cutting) + + 11. HADOOP-1379. Add findbugs target to build.xml. + (Nigel Daley via cutting) + + 12. HADOOP-1364. Fix various inconsistent synchronization issues. + (Devaraj Das via cutting) + + 13. HADOOP-1393. Remove a potential unexpected negative number from + uses of random number generator. (omalley via cutting) + + 14. HADOOP-1387. A number of "performance" code-cleanups suggested + by findbugs. (Arun C Murthy via cutting) + + 15. HADOOP-1401. Add contrib/hbase javadoc to tree. (stack via cutting) + + 16. HADOOP-894. Change HDFS so that the client only retrieves a limited + number of block locations per request from the namenode. + (Konstantin Shvachko via cutting) + + 17. HADOOP-1406. Plug a leak in MapReduce's use of metrics. + (David Bowen via cutting) + + 18. HADOOP-1394. Implement "performance" code-cleanups in HDFS + suggested by findbugs. (Raghu Angadi via cutting) + + 19. HADOOP-1413. Add example program that uses Knuth's dancing links + algorithm to solve pentomino problems. (omalley via cutting) + + 20. HADOOP-1226. Change HDFS so that paths it returns are always + fully qualified. (Dhruba Borthakur via cutting) + + 21. HADOOP-800. Improvements to HDFS web-based file browser. + (Enis Soztutar via cutting) + + 22. HADOOP-1408. Fix a compiler warning by adding a class to replace + a generic. (omalley via cutting) + + 23. HADOOP-1376. Modify RandomWriter example so that it can generate + data for the Terasort benchmark. (Devaraj Das via cutting) + + 24. HADOOP-1429. Stop logging exceptions during normal IPC server + shutdown. (stack via cutting) + + 25. HADOOP-1461. Fix the synchronization of the task tracker to + avoid lockups in job cleanup. (Arun C Murthy via omalley) + + 26. HADOOP-1446. Update the TaskTracker metrics while the task is + running. (Devaraj via omalley) + + 27. HADOOP-1414. Fix a number of issues identified by FindBugs as + "Bad Practice". (Dhruba Borthakur via cutting) + + 28. HADOOP-1392. Fix "correctness" bugs identified by FindBugs in + fs and dfs packages. (Raghu Angadi via cutting) + + 29. HADOOP-1412. Fix "dodgy" bugs identified by FindBugs in fs and + io packages. (Hairong Kuang via cutting) + + 30. HADOOP-1261. Remove redundant events from HDFS namenode's edit + log when a datanode restarts. (Raghu Angadi via cutting) + + 31. HADOOP-1336. Re-enable speculative execution by + default. (omalley via cutting) + + 32. HADOOP-1311. Fix a bug in BytesWritable#set() where start offset + was ignored. (Dhruba Borthakur via cutting) + + 33. HADOOP-1450. Move checksumming closer to user code, so that + checksums are created before data is stored in large buffers and + verified after data is read from large buffers, to better catch + memory errors. (cutting) + + 34. HADOOP-1447. Add support in contrib/data_join for text inputs. + (Senthil Subramanian via cutting) + + 35. HADOOP-1456. Fix TestDecommission assertion failure by setting + the namenode to ignore the load on datanodes while allocating + replicas. (Dhruba Borthakur via tomwhite) + + 36. HADOOP-1396. Fix FileNotFoundException on DFS block. + (Dhruba Borthakur via tomwhite) + + 37. HADOOP-1467. Remove redundant counters from WordCount example. + (Owen O'Malley via tomwhite) + + 38. HADOOP-1139. Log HDFS block transitions at INFO level, to better + enable diagnosis of problems. (Dhruba Borthakur via cutting) + + 39. HADOOP-1269. Finer grained locking in HDFS namenode. + (Dhruba Borthakur via cutting) + + 40. HADOOP-1438. Improve HDFS documentation, correcting typos and + making images appear in PDF. Also update copyright date for all + docs. (Luke Nezda via cutting) + + 41. HADOOP-1457. Add counters for monitoring task assignments. + (Arun C Murthy via tomwhite) + + 42. HADOOP-1472. Fix so that timed-out tasks are counted as failures + rather than as killed. (Arun C Murthy via cutting) + + 43. HADOOP-1234. Fix a race condition in file cache that caused + tasktracker to not be able to find cached files. + (Arun C Murthy via cutting) + + 44. HADOOP-1482. Fix secondary namenode to roll info port. + (Dhruba Borthakur via cutting) + + 45. HADOOP-1300. Improve removal of excess block replicas to be + rack-aware. Attempts are now made to keep replicas on more + racks. (Hairong Kuang via cutting) + + 46. HADOOP-1417. Disable a few FindBugs checks that generate a lot + of spurious warnings. (Nigel Daley via cutting) + + 47. HADOOP-1320. Rewrite RandomWriter example to bypass reduce. + (Arun C Murthy via cutting) + + 48. HADOOP-1449. Add some examples to contrib/data_join. + (Senthil Subramanian via cutting) + + 49. HADOOP-1459. Fix so that, in HDFS, getFileCacheHints() returns + hostnames instead of IP addresses. (Dhruba Borthakur via cutting) + + 50. HADOOP-1493. Permit specification of "java.library.path" system + property in "mapred.child.java.opts" configuration property. + (Enis Soztutar via cutting) + + 51. HADOOP-1372. Use LocalDirAllocator for HDFS temporary block + files, so that disk space, writability, etc. is considered. + (Dhruba Borthakur via cutting) + + 52. HADOOP-1193. Pool allocation of compression codecs. This + eliminates a memory leak that could cause OutOfMemoryException, + and also substantially improves performance. + (Arun C Murthy via cutting) + + 53. HADOOP-1492. Fix a NullPointerException handling version + mismatch during datanode registration. + (Konstantin Shvachko via cutting) + + 54. HADOOP-1442. Fix handling of zero-length input splits. + (Senthil Subramanian via cutting) + + 55. HADOOP-1444. Fix HDFS block id generation to check pending + blocks for duplicates. (Dhruba Borthakur via cutting) + + 56. HADOOP-1207. Fix FsShell's 'rm' command to not stop when one of + the named files does not exist. (Tsz Wo Sze via cutting) + + 57. HADOOP-1475. Clear tasktracker's file cache before it + re-initializes, to avoid confusion. (omalley via cutting) + + 58. HADOOP-1505. Remove spurious stacktrace in ZlibFactory + introduced in HADOOP-1093. (Michael Stack via tomwhite) + + 59. HADOOP-1484. Permit one to kill jobs from the web ui. Note that + this is disabled by default. One must set + "webinterface.private.actions" to enable this. + (Enis Soztutar via cutting) + + 60. HADOOP-1003. Remove flushing of namenode edit log from primary + namenode lock, increasing namenode throughput. + (Dhruba Borthakur via cutting) + + 61. HADOOP-1023. Add links to searchable mail archives. + (tomwhite via cutting) + + 62. HADOOP-1504. Fix terminate-hadoop-cluster script in contrib/ec2 + to only terminate Hadoop instances, and not other instances + started by the same user. (tomwhite via cutting) + + 63. HADOOP-1462. Improve task progress reporting. Progress reports + are no longer blocking since i/o is performed in a separate + thread. Reporting during sorting and more is also more + consistent. (Vivek Ratan via cutting) + + 64. [ intentionally blank ] + + 65. HADOOP-1453. Remove some unneeded calls to FileSystem#exists() + when opening files, reducing the namenode load somewhat. + (Raghu Angadi via cutting) + + 66. HADOOP-1489. Fix text input truncation bug due to mark/reset. + Add a unittest. (Bwolen Yang via cutting) + + 67. HADOOP-1455. Permit specification of arbitrary job options on + pipes command line. (Devaraj Das via cutting) + + 68. HADOOP-1501. Better randomize sending of block reports to + namenode, so reduce load spikes. (Dhruba Borthakur via cutting) + + 69. HADOOP-1147. Remove @author tags from Java source files. + + 70. HADOOP-1283. Convert most uses of UTF8 in the namenode to be + String. (Konstantin Shvachko via cutting) + + 71. HADOOP-1511. Speedup hbase unit tests. (stack via cutting) + + 72. HADOOP-1517. Remove some synchronization in namenode to permit + finer grained locking previously added. (Konstantin Shvachko via cutting) + + 73. HADOOP-1512. Fix failing TestTextInputFormat on Windows. + (Senthil Subramanian via nigel) + + 74. HADOOP-1518. Add a session id to job metrics, for use by HOD. + (David Bowen via cutting) + + 75. HADOOP-1292. Change 'bin/hadoop fs -get' to first copy files to + a temporary name, then rename them to their final name, so that + failures don't leave partial files. (Tsz Wo Sze via cutting) + + 76. HADOOP-1377. Add support for modification time to FileSystem and + implement in HDFS and local implementations. Also, alter access + to file properties to be through a new FileStatus interface. + (Dhruba Borthakur via cutting) + + 77. HADOOP-1515. Add MultiFileInputFormat, which can pack multiple, + typically small, input files into each split. (Enis Soztutar via cutting) + + 78. HADOOP-1514. Make reducers report progress while waiting for map + outputs, so they're not killed. (Vivek Ratan via cutting) + + 79. HADOOP-1508. Add an Ant task for FsShell operations. Also add + new FsShell commands "touchz", "test" and "stat". + (Chris Douglas via cutting) + + 80. HADOOP-1028. Add log messages for server startup and shutdown. + (Tsz Wo Sze via cutting) + + 81. HADOOP-1485. Add metrics for monitoring shuffle. + (Devaraj Das via cutting) + + 82. HADOOP-1536. Remove file locks from libhdfs tests. + (Dhruba Borthakur via nigel) + + 83. HADOOP-1520. Add appropriate synchronization to FSEditsLog. + (Dhruba Borthakur via nigel) + + 84. HADOOP-1513. Fix a race condition in directory creation. + (Devaraj via omalley) + + 85. HADOOP-1546. Remove spurious column from HDFS web UI. + (Dhruba Borthakur via cutting) + + 86. HADOOP-1556. Make LocalJobRunner delete working files at end of + job run. (Devaraj Das via tomwhite) + + 87. HADOOP-1571. Add contrib lib directories to root build.xml + javadoc classpath. (Michael Stack via tomwhite) + + 88. HADOOP-1554. Log killed tasks to the job history and display them on the + web/ui. (Devaraj Das via omalley) + + 89. HADOOP-1533. Add persistent error logging for distcp. The logs are stored + into a specified hdfs directory. (Senthil Subramanian via omalley) + + 90. HADOOP-1286. Add support to HDFS for distributed upgrades, which + permits coordinated upgrade of datanode data. + (Konstantin Shvachko via cutting) + + 91. HADOOP-1580. Improve contrib/streaming so that subprocess exit + status is displayed for errors. (John Heidemann via cutting) + + 92. HADOOP-1448. In HDFS, randomize lists of non-local block + locations returned to client, so that load is better balanced. + (Hairong Kuang via cutting) + + 93. HADOOP-1578. Fix datanode to send its storage id to namenode + during registration. (Konstantin Shvachko via cutting) + + 94. HADOOP-1584. Fix a bug in GenericWritable which limited it to + 128 types instead of 256. (Espen Amble Kolstad via cutting) + + 95. HADOOP-1473. Make job ids unique across jobtracker restarts. + (omalley via cutting) + + 96. HADOOP-1582. Fix hdfslib to return 0 instead of -1 at + end-of-file, per C conventions. (Christian Kunz via cutting) + + 97. HADOOP-911. Fix a multithreading bug in libhdfs. + (Christian Kunz) + + 98. HADOOP-1486. Fix so that fatal exceptions in namenode cause it + to exit. (Dhruba Borthakur via cutting) + + 99. HADOOP-1470. Factor checksum generation and validation out of + ChecksumFileSystem so that it can be reused by FileSystem's with + built-in checksumming. (Hairong Kuang via cutting) + +100. HADOOP-1590. Use relative urls in jobtracker jsp pages, so that + webapp can be used in non-root contexts. (Thomas Friol via cutting) + +101. HADOOP-1596. Fix the parsing of taskids by streaming and improve the + error reporting. (omalley) + +102. HADOOP-1535. Fix the user-controlled grouping to the reduce function. + (Vivek Ratan via omalley) + +103. HADOOP-1585. Modify GenericWritable to declare the classes as subtypes + of Writable (Espen Amble Kolstad via omalley) + +104. HADOOP-1576. Fix errors in count of completed tasks when + speculative execution is enabled. (Arun C Murthy via cutting) + +105. HADOOP-1598. Fix license headers: adding missing; updating old. + (Enis Soztutar via cutting) + +106. HADOOP-1547. Provide examples for aggregate library. + (Runping Qi via tomwhite) + +107. HADOOP-1570. Permit jobs to enable and disable the use of + hadoop's native library. (Arun C Murthy via cutting) + +108. HADOOP-1433. Add job priority. (Johan Oskarsson via tomwhite) + +109. HADOOP-1597. Add status reports and post-upgrade options to HDFS + distributed upgrade. (Konstantin Shvachko via cutting) + +110. HADOOP-1524. Permit user task logs to appear as they're + created. (Michael Bieniosek via cutting) + +111. HADOOP-1599. Fix distcp bug on Windows. (Senthil Subramanian via cutting) + +112. HADOOP-1562. Add JVM metrics, including GC and logging stats. + (David Bowen via cutting) + +113. HADOOP-1613. Fix "DFS Health" page to display correct time of + last contact. (Dhruba Borthakur via cutting) + +114. HADOOP-1134. Add optimized checksum support to HDFS. Checksums + are now stored with each block, rather than as parallel files. + This reduces the namenode's memory requirements and increases + data integrity. (Raghu Angadi via cutting) + +115. HADOOP-1400. Make JobClient retry requests, so that clients can + survive jobtracker problems. (omalley via cutting) + +116. HADOOP-1564. Add unit tests for HDFS block-level checksums. + (Dhruba Borthakur via cutting) + +117. HADOOP-1620. Reduce the number of abstract FileSystem methods, + simplifying implementations. (cutting) + +118. HADOOP-1625. Fix a "could not move files" exception in datanode. + (Raghu Angadi via cutting) + +119. HADOOP-1624. Fix an infinite loop in datanode. (Raghu Angadi via cutting) + +120. HADOOP-1084. Switch mapred file cache to use file modification + time instead of checksum to detect file changes, as checksums are + no longer easily accessed. (Arun C Murthy via cutting) + +130. HADOOP-1623. Fix an infinite loop when copying directories. + (Dhruba Borthakur via cutting) + +131. HADOOP-1603. Fix a bug in namenode initialization where + default replication is sometimes reset to one on restart. + (Raghu Angadi via cutting) + +132. HADOOP-1635. Remove hardcoded keypair name and fix launch-hadoop-cluster + to support later versions of ec2-api-tools. (Stu Hood via tomwhite) + +133. HADOOP-1638. Fix contrib EC2 scripts to support NAT addressing. + (Stu Hood via tomwhite) + +134. HADOOP-1632. Fix an IllegalArgumentException in fsck. + (Hairong Kuang via cutting) + +135. HADOOP-1619. Fix FSInputChecker to not attempt to read past EOF. + (Hairong Kuang via cutting) + +136. HADOOP-1640. Fix TestDecommission on Windows. + (Dhruba Borthakur via cutting) + +137. HADOOP-1587. Fix TestSymLink to get required system properties. + (Devaraj Das via omalley) + +138. HADOOP-1628. Add block CRC protocol unit tests. (Raghu Angadi via omalley) + +139. HADOOP-1653. FSDirectory code-cleanups. FSDirectory.INode + becomes a static class. (Christophe Taton via dhruba) + +140. HADOOP-1066. Restructure documentation to make more user + friendly. (Connie Kleinjans and Jeff Hammerbacher via cutting) + +141. HADOOP-1551. libhdfs supports setting replication factor and + retrieving modification time of files. (Sameer Paranjpye via dhruba) + +141. HADOOP-1647. FileSystem.getFileStatus returns valid values for "/". + (Dhruba Borthakur via dhruba) + +142. HADOOP-1657. Fix NNBench to ensure that the block size is a + multiple of bytes.per.checksum. (Raghu Angadi via dhruba) + +143. HADOOP-1553. Replace user task output and log capture code to use shell + redirection instead of copier threads in the TaskTracker. Capping the + size of the output is now done via tail in memory and thus should not be + large. The output of the tasklog servlet is not forced into UTF8 and is + not buffered entirely in memory. (omalley) + Configuration changes to hadoop-default.xml: + remove mapred.userlog.num.splits + remove mapred.userlog.purge.splits + change default mapred.userlog.limit.kb to 0 (no limit) + change default mapred.userlog.retain.hours to 24 + Configuration changes to log4j.properties: + remove log4j.appender.TLA.noKeepSplits + remove log4j.appender.TLA.purgeLogSplits + remove log4j.appender.TLA.logsRetainHours + URL changes: + http:///tasklog.jsp -> http://tasklog with + parameters limited to start and end, which may be positive (from + start) or negative (from end). + Environment: + require bash (v2 or later) and tail + +144. HADOOP-1659. Fix a job id/job name mixup. (Arun C. Murthy via omalley) + +145. HADOOP-1665. With HDFS Trash enabled and the same file was created + and deleted more than once, the suceeding deletions creates Trash item + names suffixed with a integer. (Dhruba Borthakur via dhruba) + +146. HADOOP-1666. FsShell object can be used for multiple fs commands. + (Dhruba Borthakur via dhruba) + +147. HADOOP-1654. Remove performance regression introduced by Block CRC. + (Raghu Angadi via dhruba) + +148. HADOOP-1680. Improvements to Block CRC upgrade messages. + (Raghu Angadi via dhruba) + +149. HADOOP-71. Allow Text and SequenceFile Map/Reduce inputs from non-default + filesystems. (omalley) + +150. HADOOP-1568. Expose HDFS as xml/http filesystem to provide cross-version + compatability. (Chris Douglas via omalley) + +151. HADOOP-1668. Added an INCOMPATIBILITY section to CHANGES.txt. (nigel) + +152. HADOOP-1629. Added a upgrade test for HADOOP-1134. + (Raghu Angadi via nigel) + +153. HADOOP-1698. Fix performance problems on map output sorting for jobs + with large numbers of reduces. (Devaraj Das via omalley) + +154. HADOOP-1716. Fix a Pipes wordcount example to remove the 'file:' + schema from its output path. (omalley via cutting) + +155. HADOOP-1714. Fix TestDFSUpgradeFromImage to work on Windows. + (Raghu Angadi via nigel) + +156. HADOOP-1663. Return a non-zero exit code if streaming fails. (Lohit Renu + via omalley) + +157. HADOOP-1712. Fix an unhandled exception on datanode during block + CRC upgrade. (Raghu Angadi via cutting) + +158. HADOOP-1717. Fix TestDFSUpgradeFromImage to work on Solaris. + (nigel via cutting) + +159. HADOOP-1437. Add Eclipse plugin in contrib. + (Eugene Hung and Christophe Taton via cutting) + + +Release 0.13.0 - 2007-06-08 + + 1. HADOOP-1047. Fix TestReplication to succeed more reliably. + (Hairong Kuang via cutting) + + 2. HADOOP-1063. Fix a race condition in MiniDFSCluster test code. + (Hairong Kuang via cutting) + + 3. HADOOP-1101. In web ui, split shuffle statistics from reduce + statistics, and add some task averages. (Devaraj Das via cutting) + + 4. HADOOP-1071. Improve handling of protocol version mismatch in + JobTracker. (Tahir Hashmi via cutting) + + 5. HADOOP-1116. Increase heap size used for contrib unit tests. + (Philippe Gassmann via cutting) + + 6. HADOOP-1120. Add contrib/data_join, tools to simplify joining + data from multiple sources using MapReduce. (Runping Qi via cutting) + + 7. HADOOP-1064. Reduce log level of some DFSClient messages. + (Dhruba Borthakur via cutting) + + 8. HADOOP-1137. Fix StatusHttpServer to work correctly when + resources are in a jar file. (Benjamin Reed via cutting) + + 9. HADOOP-1094. Optimize generated Writable implementations for + records to not allocate a new BinaryOutputArchive or + BinaryInputArchive per call. (Milind Bhandarkar via cutting) + +10. HADOOP-1068. Improve error message for clusters with 0 datanodes. + (Dhruba Borthakur via tomwhite) + +11. HADOOP-1122. Fix divide-by-zero exception in FSNamesystem + chooseTarget method. (Dhruba Borthakur via tomwhite) + +12. HADOOP-1131. Add a closeAll() static method to FileSystem. + (Philippe Gassmann via tomwhite) + +13. HADOOP-1085. Improve port selection in HDFS and MapReduce test + code. Ports are now selected by the OS during testing rather than + by probing for free ports, improving test reliability. + (Arun C Murthy via cutting) + +14. HADOOP-1153. Fix HDFS daemons to correctly stop their threads. + (Konstantin Shvachko via cutting) + +15. HADOOP-1146. Add a counter for reduce input keys and rename the + "reduce input records" counter to be "reduce input groups". + (David Bowen via cutting) + +16. HADOOP-1165. In records, replace idential generated toString + methods with a method on the base class. (Milind Bhandarkar via cutting) + +17. HADOOP-1164. Fix TestReplicationPolicy to specify port zero, so + that a free port is automatically selected. (omalley via cutting) + +18. HADOOP-1166. Add a NullOutputFormat and use it in the + RandomWriter example. (omalley via cutting) + +19. HADOOP-1169. Fix a cut/paste error in CopyFiles utility so that + S3-based source files are correctly copied. (Michael Stack via cutting) + +20. HADOOP-1167. Remove extra synchronization in InMemoryFileSystem. + (omalley via cutting) + +21. HADOOP-1110. Fix an off-by-one error counting map inputs. + (David Bowen via cutting) + +22. HADOOP-1178. Fix a NullPointerException during namenode startup. + (Dhruba Borthakur via cutting) + +23. HADOOP-1011. Fix a ConcurrentModificationException when viewing + job history. (Tahir Hashmi via cutting) + +24. HADOOP-672. Improve help for fs shell commands. + (Dhruba Borthakur via cutting) + +25. HADOOP-1170. Improve datanode performance by removing device + checks from common operations. (Igor Bolotin via cutting) + +26. HADOOP-1090. Fix SortValidator's detection of whether the input + file belongs to the sort-input or sort-output directory. + (Arun C Murthy via tomwhite) + +27. HADOOP-1081. Fix bin/hadoop on Darwin. (Michael Bieniosek via cutting) + +28. HADOOP-1045. Add contrib/hbase, a BigTable-like online database. + (Jim Kellerman via cutting) + +29. HADOOP-1156. Fix a NullPointerException in MiniDFSCluster. + (Hairong Kuang via cutting) + +30. HADOOP-702. Add tools to help automate HDFS upgrades. + (Konstantin Shvachko via cutting) + +31. HADOOP-1163. Fix ganglia metrics to aggregate metrics from different + hosts properly. (Michael Bieniosek via tomwhite) + +32. HADOOP-1194. Make compression style record level for map output + compression. (Arun C Murthy via tomwhite) + +33. HADOOP-1187. Improve DFS Scalability: avoid scanning entire list of + datanodes in getAdditionalBlocks. (Dhruba Borthakur via tomwhite) + +34. HADOOP-1133. Add tool to analyze and debug namenode on a production + cluster. (Dhruba Borthakur via tomwhite) + +35. HADOOP-1151. Remove spurious printing to stderr in streaming + PipeMapRed. (Koji Noguchi via tomwhite) + +36. HADOOP-988. Change namenode to use a single map of blocks to metadata. + (Raghu Angadi via tomwhite) + +37. HADOOP-1203. Change UpgradeUtilities used by DFS tests to use + MiniDFSCluster to start and stop NameNode/DataNodes. + (Nigel Daley via tomwhite) + +38. HADOOP-1217. Add test.timeout property to build.xml, so that + long-running unit tests may be automatically terminated. + (Nigel Daley via cutting) + +39. HADOOP-1149. Improve DFS Scalability: make + processOverReplicatedBlock() a no-op if blocks are not + over-replicated. (Raghu Angadi via tomwhite) + +40. HADOOP-1149. Improve DFS Scalability: optimize getDistance(), + contains(), and isOnSameRack() in NetworkTopology. + (Hairong Kuang via tomwhite) + +41. HADOOP-1218. Make synchronization on TaskTracker's RunningJob + object consistent. (Devaraj Das via tomwhite) + +42. HADOOP-1219. Ignore progress report once a task has reported as + 'done'. (Devaraj Das via tomwhite) + +43. HADOOP-1114. Permit user to specify additional CLASSPATH elements + with a HADOOP_CLASSPATH environment variable. (cutting) + +44. HADOOP-1198. Remove ipc.client.timeout parameter override from + unit test configuration. Using the default is more robust and + has almost the same run time. (Arun C Murthy via tomwhite) + +45. HADOOP-1211. Remove deprecated constructor and unused static + members in DataNode class. (Konstantin Shvachko via tomwhite) + +46. HADOOP-1136. Fix ArrayIndexOutOfBoundsException in + FSNamesystem$UnderReplicatedBlocks add() method. + (Hairong Kuang via tomwhite) + +47. HADOOP-978. Add the client name and the address of the node that + previously started to create the file to the description of + AlreadyBeingCreatedException. (Konstantin Shvachko via tomwhite) + +48. HADOOP-1001. Check the type of keys and values generated by the + mapper against the types specified in JobConf. + (Tahir Hashmi via tomwhite) + +49. HADOOP-971. Improve DFS Scalability: Improve name node performance + by adding a hostname to datanodes map. (Hairong Kuang via tomwhite) + +50. HADOOP-1189. Fix 'No space left on device' exceptions on datanodes. + (Raghu Angadi via tomwhite) + +51. HADOOP-819. Change LineRecordWriter to not insert a tab between + key and value when either is null, and to print nothing when both + are null. (Runping Qi via cutting) + +52. HADOOP-1204. Rename InputFormatBase to be FileInputFormat, and + deprecate InputFormatBase. Also make LineRecordReader easier to + extend. (Runping Qi via cutting) + +53. HADOOP-1213. Improve logging of errors by IPC server, to + consistently include the service name and the call. (cutting) + +54. HADOOP-1238. Fix metrics reporting by TaskTracker to correctly + track maps_running and reduces_running. + (Michael Bieniosek via cutting) + +55. HADOOP-1093. Fix a race condition in HDFS where blocks were + sometimes erased before they were reported written. + (Dhruba Borthakur via cutting) + +56. HADOOP-1239. Add a package name to some testjar test classes. + (Jim Kellerman via cutting) + +57. HADOOP-1241. Fix NullPointerException in processReport when + namenode is restarted. (Dhruba Borthakur via tomwhite) + +58. HADOOP-1244. Fix stop-dfs.sh to no longer incorrectly specify + slaves file for stopping datanode. + (Michael Bieniosek via tomwhite) + +59. HADOOP-1253. Fix ConcurrentModificationException and + NullPointerException in JobControl. + (Johan Oskarson via tomwhite) + +60. HADOOP-1256. Fix NameNode so that multiple DataNodeDescriptors + can no longer be created on startup. (Hairong Kuang via cutting) + +61. HADOOP-1214. Replace streaming classes with new counterparts + from Hadoop core. (Runping Qi via tomwhite) + +62. HADOOP-1250. Move a chmod utility from streaming to FileUtil. + (omalley via cutting) + +63. HADOOP-1258. Fix TestCheckpoint test case to wait for + MiniDFSCluster to be active. (Nigel Daley via tomwhite) + +64. HADOOP-1148. Re-indent all Java source code to consistently use + two spaces per indent level. (cutting) + +65. HADOOP-1251. Add a method to Reporter to get the map InputSplit. + (omalley via cutting) + +66. HADOOP-1224. Fix "Browse the filesystem" link to no longer point + to dead datanodes. (Enis Soztutar via tomwhite) + +67. HADOOP-1154. Fail a streaming task if the threads reading from or + writing to the streaming process fail. (Koji Noguchi via tomwhite) + +68. HADOOP-968. Move shuffle and sort to run in reduce's child JVM, + rather than in TaskTracker. (Devaraj Das via cutting) + +69. HADOOP-1111. Add support for client notification of job + completion. If the job configuration has a job.end.notification.url + property it will make a HTTP GET request to the specified URL. + The number of retries and the interval between retries is also + configurable. (Alejandro Abdelnur via tomwhite) + +70. HADOOP-1275. Fix misspelled job notification property in + hadoop-default.xml. (Alejandro Abdelnur via tomwhite) + +71. HADOOP-1152. Fix race condition in MapOutputCopier.copyOutput file + rename causing possible reduce task hang. + (Tahir Hashmi via tomwhite) + +72. HADOOP-1050. Distinguish between failed and killed tasks so as to + not count a lost tasktracker against the job. + (Arun C Murthy via tomwhite) + +73. HADOOP-1271. Fix StreamBaseRecordReader to be able to log record + data that's not UTF-8. (Arun C Murthy via tomwhite) + +74. HADOOP-1190. Fix unchecked warnings in main Hadoop code. + (tomwhite) + +75. HADOOP-1127. Fix AlreadyBeingCreatedException in namenode for + jobs run with speculative execution. + (Arun C Murthy via tomwhite) + +76. HADOOP-1282. Omnibus HBase patch. Improved tests & configuration. + (Jim Kellerman via cutting) + +77. HADOOP-1262. Make dfs client try to read from a different replica + of the checksum file when a checksum error is detected. + (Hairong Kuang via tomwhite) + +78. HADOOP-1279. Fix JobTracker to maintain list of recently + completed jobs by order of completion, not submission. + (Arun C Murthy via cutting) + +79. HADOOP-1284. In contrib/streaming, permit flexible specification + of field delimiter and fields for partitioning and sorting. + (Runping Qi via cutting) + +80. HADOOP-1176. Fix a bug where reduce would hang when a map had + more than 2GB of output for it. (Arun C Murthy via cutting) + +81. HADOOP-1293. Fix contrib/streaming to print more than the first + twenty lines of standard error. (Koji Noguchi via cutting) + +82. HADOOP-1297. Fix datanode so that requests to remove blocks that + do not exist no longer causes block reports to be re-sent every + second. (Dhruba Borthakur via cutting) + +83. HADOOP-1216. Change MapReduce so that, when numReduceTasks is + zero, map outputs are written directly as final output, skipping + shuffle, sort and reduce. Use this to implement reduce=NONE + option in contrib/streaming. (Runping Qi via cutting) + +84. HADOOP-1294. Fix unchecked warnings in main Hadoop code under + Java 6. (tomwhite) + +85. HADOOP-1299. Fix so that RPC will restart after RPC.stopClient() + has been called. (Michael Stack via cutting) + +86. HADOOP-1278. Improve blacklisting of TaskTrackers by JobTracker, + to reduce false positives. (Arun C Murthy via cutting) + +87. HADOOP-1290. Move contrib/abacus into mapred/lib/aggregate. + (Runping Qi via cutting) + +88. HADOOP-1272. Extract inner classes from FSNamesystem into separate + classes. (Dhruba Borthakur via tomwhite) + +89. HADOOP-1247. Add support to contrib/streaming for aggregate + package, formerly called Abacus. (Runping Qi via cutting) + +90. HADOOP-1061. Fix bug in listing files in the S3 filesystem. + NOTE: this change is not backwards compatible! You should use the + MigrationTool supplied to migrate existing S3 filesystem data to + the new format. Please backup your data first before upgrading + (using 'hadoop distcp' for example). (tomwhite) + +91. HADOOP-1304. Make configurable the maximum number of task + attempts before a job fails. (Devaraj Das via cutting) + +92. HADOOP-1308. Use generics to restrict types when classes are + passed as parameters to JobConf methods. (Michael Bieniosek via cutting) + +93. HADOOP-1312. Fix a ConcurrentModificationException in NameNode + that killed the heartbeat monitoring thread. + (Dhruba Borthakur via cutting) + +94. HADOOP-1315. Clean up contrib/streaming, switching it to use core + classes more and removing unused code. (Runping Qi via cutting) + +95. HADOOP-485. Allow a different comparator for grouping keys in + calls to reduce. (Tahir Hashmi via cutting) + +96. HADOOP-1322. Fix TaskTracker blacklisting to work correctly in + one- and two-node clusters. (Arun C Murthy via cutting) + +97. HADOOP-1144. Permit one to specify a maximum percentage of tasks + that can fail before a job is aborted. The default is zero. + (Arun C Murthy via cutting) + +98. HADOOP-1184. Fix HDFS decomissioning to complete when the only + copy of a block is on a decommissioned node. (Dhruba Borthakur via cutting) + +99. HADOOP-1263. Change DFSClient to retry certain namenode calls + with a random, exponentially increasing backoff time, to avoid + overloading the namenode on, e.g., job start. (Hairong Kuang via cutting) + +100. HADOOP-1325. First complete, functioning version of HBase. + (Jim Kellerman via cutting) + +101. HADOOP-1276. Make tasktracker expiry interval configurable. + (Arun C Murthy via cutting) + +102. HADOOP-1326. Change JobClient#RunJob() to return the job. + (omalley via cutting) + +103. HADOOP-1270. Randomize the fetch of map outputs, speeding the + shuffle. (Arun C Murthy via cutting) + +104. HADOOP-1200. Restore disk checking lost in HADOOP-1170. + (Hairong Kuang via cutting) + +105. HADOOP-1252. Changed MapReduce's allocation of local files to + use round-robin among available devices, rather than a hashcode. + More care is also taken to not allocate files on full or offline + drives. (Devaraj Das via cutting) + +106. HADOOP-1324. Change so that an FSError kills only the task that + generates it rather than the entire task tracker. + (Arun C Murthy via cutting) + +107. HADOOP-1310. Fix unchecked warnings in aggregate code. (tomwhite) + +108. HADOOP-1255. Fix a bug where the namenode falls into an infinite + loop trying to remove a dead node. (Hairong Kuang via cutting) + +109. HADOOP-1160. Fix DistributedFileSystem.close() to close the + underlying FileSystem, correctly aborting files being written. + (Hairong Kuang via cutting) + +110. HADOOP-1341. Fix intermittent failures in HBase unit tests + caused by deadlock. (Jim Kellerman via cutting) + +111. HADOOP-1350. Fix shuffle performance problem caused by forcing + chunked encoding of map outputs. (Devaraj Das via cutting) + +112. HADOOP-1345. Fix HDFS to correctly retry another replica when a + checksum error is encountered. (Hairong Kuang via cutting) + +113. HADOOP-1205. Improve synchronization around HDFS block map. + (Hairong Kuang via cutting) + +114. HADOOP-1353. Fix a potential NullPointerException in namenode. + (Dhruba Borthakur via cutting) + +115. HADOOP-1354. Fix a potential NullPointerException in FsShell. + (Hairong Kuang via cutting) + +116. HADOOP-1358. Fix a potential bug when DFSClient calls skipBytes. + (Hairong Kuang via cutting) + +117. HADOOP-1356. Fix a bug in ValueHistogram. (Runping Qi via cutting) + +118. HADOOP-1363. Fix locking bug in JobClient#waitForCompletion(). + (omalley via cutting) + +119. HADOOP-1368. Fix inconsistent synchronization in JobInProgress. + (omalley via cutting) + +120. HADOOP-1369. Fix inconsistent synchronization in TaskTracker. + (omalley via cutting) + +121. HADOOP-1361. Fix various calls to skipBytes() to check return + value. (Hairong Kuang via cutting) + +122. HADOOP-1388. Fix a potential NullPointerException in web ui. + (Devaraj Das via cutting) + +123. HADOOP-1385. Fix MD5Hash#hashCode() to generally hash to more + than 256 values. (omalley via cutting) + +124. HADOOP-1386. Fix Path to not permit the empty string as a + path, as this has lead to accidental file deletion. Instead + force applications to use "." to name the default directory. + (Hairong Kuang via cutting) + +125. HADOOP-1407. Fix integer division bug in JobInProgress which + meant failed tasks didn't cause the job to fail. + (Arun C Murthy via tomwhite) + +126. HADOOP-1427. Fix a typo that caused GzipCodec to incorrectly use + a very small input buffer. (Espen Amble Kolstad via cutting) + +127. HADOOP-1435. Fix globbing code to no longer use the empty string + to indicate the default directory, per HADOOP-1386. + (Hairong Kuang via cutting) + +128. HADOOP-1411. Make task retry framework handle + AlreadyBeingCreatedException when wrapped as a RemoteException. + (Hairong Kuang via tomwhite) + +129. HADOOP-1242. Improve handling of DFS upgrades. + (Konstantin Shvachko via cutting) + +130. HADOOP-1332. Fix so that TaskTracker exits reliably during unit + tests on Windows. (omalley via cutting) + +131. HADOOP-1431. Fix so that sort progress reporting during map runs + only while sorting, so that stuck maps are correctly terminated. + (Devaraj Das and Arun C Murthy via cutting) + +132. HADOOP-1452. Change TaskTracker.MapOutputServlet.doGet.totalRead + to a long, permitting map outputs to exceed 2^31 bytes. + (omalley via cutting) + +133. HADOOP-1443. Fix a bug opening zero-length files in HDFS. + (Konstantin Shvachko via cutting) + + +Release 0.12.3 - 2007-04-06 + + 1. HADOOP-1162. Fix bug in record CSV and XML serialization of + binary values. (Milind Bhandarkar via cutting) + + 2. HADOOP-1123. Fix NullPointerException in LocalFileSystem when + trying to recover from a checksum error. + (Hairong Kuang & Nigel Daley via tomwhite) + + 3. HADOOP-1177. Fix bug where IOException in MapOutputLocation.getFile + was not being logged. (Devaraj Das via tomwhite) + + 4. HADOOP-1175. Fix bugs in JSP for displaying a task's log messages. + (Arun C Murthy via cutting) + + 5. HADOOP-1191. Fix map tasks to wait until sort progress thread has + stopped before reporting the task done. (Devaraj Das via cutting) + + 6. HADOOP-1192. Fix an integer overflow bug in FSShell's 'dus' + command and a performance problem in HDFS's implementation of it. + (Hairong Kuang via cutting) + + 7. HADOOP-1105. Fix reducers to make "progress" while iterating + through values. (Devaraj Das & Owen O'Malley via tomwhite) + + 8. HADOOP-1179. Make Task Tracker close index file as soon as the read + is done when serving get-map-output requests. + (Devaraj Das via tomwhite) + + +Release 0.12.2 - 2007-23-17 + + 1. HADOOP-1135. Fix bug in block report processing which may cause + the namenode to delete blocks. (Dhruba Borthakur via tomwhite) + + 2. HADOOP-1145. Make XML serializer and deserializer classes public + in record package. (Milind Bhandarkar via cutting) + + 3. HADOOP-1140. Fix a deadlock in metrics. (David Bowen via cutting) + + 4. HADOOP-1150. Fix streaming -reducer and -mapper to give them + defaults. (Owen O'Malley via tomwhite) + + +Release 0.12.1 - 2007-03-17 + + 1. HADOOP-1035. Fix a StackOverflowError in FSDataSet. + (Raghu Angadi via cutting) + + 2. HADOOP-1053. Fix VInt representation of negative values. Also + remove references in generated record code to methods outside of + the record package and improve some record documentation. + (Milind Bhandarkar via cutting) + + 3. HADOOP-1067. Compile fails if Checkstyle jar is present in lib + directory. Also remove dependency on a particular Checkstyle + version number. (tomwhite) + + 4. HADOOP-1060. Fix an IndexOutOfBoundsException in the JobTracker + that could cause jobs to hang. (Arun C Murthy via cutting) + + 5. HADOOP-1077. Fix a race condition fetching map outputs that could + hang reduces. (Devaraj Das via cutting) + + 6. HADOOP-1083. Fix so that when a cluster restarts with a missing + datanode, its blocks are replicated. (Hairong Kuang via cutting) + + 7. HADOOP-1082. Fix a NullPointerException in ChecksumFileSystem. + (Hairong Kuang via cutting) + + 8. HADOOP-1088. Fix record serialization of negative values. + (Milind Bhandarkar via cutting) + + 9. HADOOP-1080. Fix bug in bin/hadoop on Windows when native + libraries are present. (ab via cutting) + +10. HADOOP-1091. Fix a NullPointerException in MetricsRecord. + (David Bowen via tomwhite) + +11. HADOOP-1092. Fix a NullPointerException in HeartbeatMonitor + thread. (Hairong Kuang via tomwhite) + +12. HADOOP-1112. Fix a race condition in Hadoop metrics. + (David Bowen via tomwhite) + +13. HADOOP-1108. Checksummed file system should retry reading if a + different replica is found when handling ChecksumException. + (Hairong Kuang via tomwhite) + +14. HADOOP-1070. Fix a problem with number of racks and datanodes + temporarily doubling. (Konstantin Shvachko via tomwhite) + +15. HADOOP-1099. Fix NullPointerException in JobInProgress. + (Gautam Kowshik via tomwhite) + +16. HADOOP-1115. Fix bug where FsShell copyToLocal doesn't + copy directories. (Hairong Kuang via tomwhite) + +17. HADOOP-1109. Fix NullPointerException in StreamInputFormat. + (Koji Noguchi via tomwhite) + +18. HADOOP-1117. Fix DFS scalability: when the namenode is + restarted it consumes 80% CPU. (Dhruba Borthakur via + tomwhite) + +19. HADOOP-1089. Make the C++ version of write and read v-int + agree with the Java versions. (Milind Bhandarkar via + tomwhite) + +20. HADOOP-1096. Rename InputArchive and OutputArchive and + make them public. (Milind Bhandarkar via tomwhite) + +21. HADOOP-1128. Fix missing progress information in map tasks. + (Espen Amble Kolstad, Andrzej Bialecki, and Owen O'Malley + via tomwhite) + +22. HADOOP-1129. Fix DFSClient to not hide IOExceptions in + flush method. (Hairong Kuang via tomwhite) + +23. HADOOP-1126. Optimize CPU usage for under replicated blocks + when cluster restarts. (Hairong Kuang via tomwhite) + + +Release 0.12.0 - 2007-03-02 + + 1. HADOOP-975. Separate stdout and stderr from tasks. + (Arun C Murthy via cutting) + + 2. HADOOP-982. Add some setters and a toString() method to + BytesWritable. (omalley via cutting) + + 3. HADOOP-858. Move contrib/smallJobsBenchmark to src/test, removing + obsolete bits. (Nigel Daley via cutting) + + 4. HADOOP-992. Fix MiniMR unit tests to use MiniDFS when specified, + rather than the local FS. (omalley via cutting) + + 5. HADOOP-954. Change use of metrics to use callback mechanism. + Also rename utility class Metrics to MetricsUtil. + (David Bowen & Nigel Daley via cutting) + + 6. HADOOP-893. Improve HDFS client's handling of dead datanodes. + The set is no longer reset with each block, but rather is now + maintained for the life of an open file. (Raghu Angadi via cutting) + + 7. HADOOP-882. Upgrade to jets3t version 0.5, used by the S3 + FileSystem. This version supports retries. (Michael Stack via cutting) + + 8. HADOOP-977. Send task's stdout and stderr to JobClient's stdout + and stderr respectively, with each line tagged by the task's name. + (Arun C Murthy via cutting) + + 9. HADOOP-761. Change unit tests to not use /tmp. (Nigel Daley via cutting) + +10. HADOOP-1007. Make names of metrics used in Hadoop unique. + (Nigel Daley via cutting) + +11. HADOOP-491. Change mapred.task.timeout to be per-job, and make a + value of zero mean no timeout. Also change contrib/streaming to + disable task timeouts. (Arun C Murthy via cutting) + +12. HADOOP-1010. Add Reporter.NULL, a Reporter implementation that + does nothing. (Runping Qi via cutting) + +13. HADOOP-923. In HDFS NameNode, move replication computation to a + separate thread, to improve heartbeat processing time. + (Dhruba Borthakur via cutting) + +14. HADOOP-476. Rewrite contrib/streaming command-line processing, + improving parameter validation. (Sanjay Dahiya via cutting) + +15. HADOOP-973. Improve error messages in Namenode. This should help + to track down a problem that was appearing as a + NullPointerException. (Dhruba Borthakur via cutting) + +16. HADOOP-649. Fix so that jobs with no tasks are not lost. + (Thomas Friol via cutting) + +17. HADOOP-803. Reduce memory use by HDFS namenode, phase I. + (Raghu Angadi via cutting) + +18. HADOOP-1021. Fix MRCaching-based unit tests on Windows. + (Nigel Daley via cutting) + +19. HADOOP-889. Remove duplicate code from HDFS unit tests. + (Milind Bhandarkar via cutting) + +20. HADOOP-943. Improve HDFS's fsck command to display the filename + for under-replicated blocks. (Dhruba Borthakur via cutting) + +21. HADOOP-333. Add validator for sort benchmark output. + (Arun C Murthy via cutting) + +22. HADOOP-947. Improve performance of datanode decomissioning. + (Dhruba Borthakur via cutting) + +23. HADOOP-442. Permit one to specify hosts allowed to connect to + namenode and jobtracker with include and exclude files. (Wendy + Chien via cutting) + +24. HADOOP-1017. Cache constructors, for improved performance. + (Ron Bodkin via cutting) + +25. HADOOP-867. Move split creation out of JobTracker to client. + Splits are now saved in a separate file, read by task processes + directly, so that user code is no longer required in the + JobTracker. (omalley via cutting) + +26. HADOOP-1006. Remove obsolete '-local' option from test code. + (Gautam Kowshik via cutting) + +27. HADOOP-952. Create a public (shared) Hadoop EC2 AMI. + The EC2 scripts now support launch of public AMIs. + (tomwhite) + +28. HADOOP-1025. Remove some obsolete code in ipc.Server. (cutting) + +29. HADOOP-997. Implement S3 retry mechanism for failed block + transfers. This includes a generic retry mechanism for use + elsewhere in Hadoop. (tomwhite) + +30. HADOOP-990. Improve HDFS support for full datanode volumes. + (Raghu Angadi via cutting) + +31. HADOOP-564. Replace uses of "dfs://" URIs with the more standard + "hdfs://". (Wendy Chien via cutting) + +32. HADOOP-1030. In unit tests, unify setting of ipc.client.timeout. + Also increase the value used from one to two seconds, in hopes of + making tests complete more reliably. (cutting) + +33. HADOOP-654. Stop assigning tasks to a tasktracker if it has + failed more than a specified number in the job. + (Arun C Murthy via cutting) + +34. HADOOP-985. Change HDFS to identify nodes by IP address rather + than by DNS hostname. (Raghu Angadi via cutting) + +35. HADOOP-248. Optimize location of map outputs to not use random + probes. (Devaraj Das via cutting) + +36. HADOOP-1029. Fix streaming's input format to correctly seek to + the start of splits. (Arun C Murthy via cutting) + +37. HADOOP-492. Add per-job and per-task counters. These are + incremented via the Reporter interface and available through the + web ui and the JobClient API. The mapreduce framework maintains a + few basic counters, and applications may add their own. Counters + are also passed to the metrics system. + (David Bowen via cutting) + +38. HADOOP-1034. Fix datanode to better log exceptions. + (Philippe Gassmann via cutting) + +39. HADOOP-878. In contrib/streaming, fix reducer=NONE to work with + multiple maps. (Arun C Murthy via cutting) + +40. HADOOP-1039. In HDFS's TestCheckpoint, avoid restarting + MiniDFSCluster so often, speeding this test. (Dhruba Borthakur via cutting) + +41. HADOOP-1040. Update RandomWriter example to use counters and + user-defined input and output formats. (omalley via cutting) + +42. HADOOP-1027. Fix problems with in-memory merging during shuffle + and re-enable this optimization. (Devaraj Das via cutting) + +43. HADOOP-1036. Fix exception handling in TaskTracker to keep tasks + from being lost. (Arun C Murthy via cutting) + +44. HADOOP-1042. Improve the handling of failed map output fetches. + (Devaraj Das via cutting) + +45. HADOOP-928. Make checksums optional per FileSystem. + (Hairong Kuang via cutting) + +46. HADOOP-1044. Fix HDFS's TestDecommission to not spuriously fail. + (Wendy Chien via cutting) + +47. HADOOP-972. Optimize HDFS's rack-aware block placement algorithm. + (Hairong Kuang via cutting) + +48. HADOOP-1043. Optimize shuffle, increasing parallelism. + (Devaraj Das via cutting) + +49. HADOOP-940. Improve HDFS's replication scheduling. + (Dhruba Borthakur via cutting) + +50. HADOOP-1020. Fix a bug in Path resolution, and a with unit tests + on Windows. (cutting) + +51. HADOOP-941. Enhance record facility. + (Milind Bhandarkar via cutting) + +52. HADOOP-1000. Fix so that log messages in task subprocesses are + not written to a task's standard error. (Arun C Murthy via cutting) + +53. HADOOP-1037. Fix bin/slaves.sh, which currently only works with + /bin/bash, to specify /bin/bash rather than /bin/sh. (cutting) + +54. HADOOP-1046. Clean up tmp from partially received stale block files. (ab) + +55. HADOOP-1041. Optimize mapred counter implementation. Also group + counters by their declaring Enum. (David Bowen via cutting) + +56. HADOOP-1032. Permit one to specify jars that will be cached + across multiple jobs. (Gautam Kowshik via cutting) + +57. HADOOP-1051. Add optional checkstyle task to build.xml. To use + this developers must download the (LGPL'd) checkstyle jar + themselves. (tomwhite via cutting) + +58. HADOOP-1049. Fix a race condition in IPC client. + (Devaraj Das via cutting) + +60. HADOOP-1056. Check HDFS include/exclude node lists with both IP + address and hostname. (Wendy Chien via cutting) + +61. HADOOP-994. In HDFS, limit the number of blocks invalidated at + once. Large lists were causing datenodes to timeout. + (Dhruba Borthakur via cutting) + +62. HADOOP-432. Add a trash feature, disabled by default. When + enabled, the FSShell 'rm' command will move things to a trash + directory in the filesystem. In HDFS, a thread periodically + checkpoints the trash and removes old checkpoints. (cutting) + + +Release 0.11.2 - 2007-02-16 + + 1. HADOOP-1009. Fix an infinite loop in the HDFS namenode. + (Dhruba Borthakur via cutting) + + 2. HADOOP-1014. Disable in-memory merging during shuffle, as this is + causing data corruption. (Devaraj Das via cutting) + + +Release 0.11.1 - 2007-02-09 + + 1. HADOOP-976. Make SequenceFile.Metadata public. (Runping Qi via cutting) + + 2. HADOOP-917. Fix a NullPointerException in SequenceFile's merger + with large map outputs. (omalley via cutting) + + 3. HADOOP-984. Fix a bug in shuffle error handling introduced by + HADOOP-331. If a map output is unavailable, the job tracker is + once more informed. (Arun C Murthy via cutting) + + 4. HADOOP-987. Fix a problem in HDFS where blocks were not removed + from neededReplications after a replication target was selected. + (Hairong Kuang via cutting) + +Release 0.11.0 - 2007-02-02 + + 1. HADOOP-781. Remove methods deprecated in 0.10 that are no longer + widely used. (cutting) + + 2. HADOOP-842. Change HDFS protocol so that the open() method is + passed the client hostname, to permit the namenode to order block + locations on the basis of network topology. + (Hairong Kuang via cutting) + + 3. HADOOP-852. Add an ant task to compile record definitions, and + use it to compile record unit tests. (Milind Bhandarkar via cutting) + + 4. HADOOP-757. Fix "Bad File Descriptor" exception in HDFS client + when an output file is closed twice. (Raghu Angadi via cutting) + + 5. [ intentionally blank ] + + 6. HADOOP-890. Replace dashes in metric names with underscores, + for better compatibility with some monitoring systems. + (Nigel Daley via cutting) + + 7. HADOOP-801. Add to jobtracker a log of task completion events. + (Sanjay Dahiya via cutting) + + 8. HADOOP-855. In HDFS, try to repair files with checksum errors. + An exception is still thrown, but corrupt blocks are now removed + when they have replicas. (Wendy Chien via cutting) + + 9. HADOOP-886. Reduce number of timer threads created by metrics API + by pooling contexts. (Nigel Daley via cutting) + +10. HADOOP-897. Add a "javac.args" property to build.xml that permits + one to pass arbitrary options to javac. (Milind Bhandarkar via cutting) + +11. HADOOP-899. Update libhdfs for changes in HADOOP-871. + (Sameer Paranjpye via cutting) + +12. HADOOP-905. Remove some dead code from JobClient. (cutting) + +13. HADOOP-902. Fix a NullPointerException in HDFS client when + closing output streams. (Raghu Angadi via cutting) + +14. HADOOP-735. Switch generated record code to use BytesWritable to + represent fields of type 'buffer'. (Milind Bhandarkar via cutting) + +15. HADOOP-830. Improve mapreduce merge performance by buffering and + merging multiple map outputs as they arrive at reduce nodes before + they're written to disk. (Devaraj Das via cutting) + +16. HADOOP-908. Add a new contrib package, Abacus, that simplifies + counting and aggregation, built on MapReduce. (Runping Qi via cutting) + +17. HADOOP-901. Add support for recursive renaming to the S3 filesystem. + (Tom White via cutting) + +18. HADOOP-912. Fix a bug in TaskTracker.isIdle() that was + sporadically causing unit test failures. (Arun C Murthy via cutting) + +19. HADOOP-909. Fix the 'du' command to correctly compute the size of + FileSystem directory trees. (Hairong Kuang via cutting) + +20. HADOOP-731. When a checksum error is encountered on a file stored + in HDFS, try another replica of the data, if any. + (Wendy Chien via cutting) + +21. HADOOP-732. Add support to SequenceFile for arbitrary metadata, + as a set of attribute value pairs. (Runping Qi via cutting) + +22. HADOOP-929. Fix PhasedFileSystem to pass configuration to + underlying FileSystem. (Sanjay Dahiya via cutting) + +23. HADOOP-935. Fix contrib/abacus to not delete pre-existing output + files, but rather to fail in this case. (Runping Qi via cutting) + +24. HADOOP-936. More metric renamings, as in HADOOP-890. + (Nigel Daley via cutting) + +25. HADOOP-856. Fix HDFS's fsck command to not report that + non-existent filesystems are healthy. (Milind Bhandarkar via cutting) + +26. HADOOP-602. Remove the dependency on Lucene's PriorityQueue + utility, by copying it into Hadoop. This facilitates using Hadoop + with different versions of Lucene without worrying about CLASSPATH + order. (Milind Bhandarkar via cutting) + +27. [ intentionally blank ] + +28. HADOOP-227. Add support for backup namenodes, which periodically + get snapshots of the namenode state. (Dhruba Borthakur via cutting) + +29. HADOOP-884. Add scripts in contrib/ec2 to facilitate running + Hadoop on an Amazon's EC2 cluster. (Tom White via cutting) + +30. HADOOP-937. Change the namenode to request re-registration of + datanodes in more circumstances. (Hairong Kuang via cutting) + +31. HADOOP-922. Optimize small forward seeks in HDFS. If data is has + likely already in flight, skip ahead rather than re-opening the + block. (Dhruba Borthakur via cutting) + +32. HADOOP-961. Add a 'job -events' sub-command that prints job + events, including task completions and failures. (omalley via cutting) + +33. HADOOP-959. Fix namenode snapshot code added in HADOOP-227 to + work on Windows. (Dhruba Borthakur via cutting) + +34. HADOOP-934. Fix TaskTracker to catch metrics exceptions that were + causing heartbeats to fail. (Arun Murthy via cutting) + +35. HADOOP-881. Fix JobTracker web interface to display the correct + number of task failures. (Sanjay Dahiya via cutting) + +36. HADOOP-788. Change contrib/streaming to subclass TextInputFormat, + permitting it to take advantage of native compression facilities. + (Sanjay Dahiya via cutting) + +37. HADOOP-962. In contrib/ec2: make scripts executable in tar file; + add a README; make the environment file use a template. + (Tom White via cutting) + +38. HADOOP-549. Fix a NullPointerException in TaskReport's + serialization. (omalley via cutting) + +39. HADOOP-963. Fix remote exceptions to have the stack trace of the + caller thread, not the IPC listener thread. (omalley via cutting) + +40. HADOOP-967. Change RPC clients to start sending a version header. + (omalley via cutting) + +41. HADOOP-964. Fix a bug introduced by HADOOP-830 where jobs failed + whose comparators and/or i/o types were in the job's jar. + (Dennis Kubes via cutting) + +42. HADOOP-969. Fix a deadlock in JobTracker. (omalley via cutting) + +43. HADOOP-862. Add support for the S3 FileSystem to the CopyFiles + tool. (Michael Stack via cutting) + +44. HADOOP-965. Fix IsolationRunner so that job's jar can be found. + (Dennis Kubes via cutting) + +45. HADOOP-309. Fix two NullPointerExceptions in StatusHttpServer. + (navychen via cutting) + +46. HADOOP-692. Add rack awareness to HDFS's placement of blocks. + (Hairong Kuang via cutting) + + +Release 0.10.1 - 2007-01-10 + + 1. HADOOP-857. Fix S3 FileSystem implementation to permit its use + for MapReduce input and output. (Tom White via cutting) + + 2. HADOOP-863. Reduce logging verbosity introduced by HADOOP-813. + (Devaraj Das via cutting) + + 3. HADOOP-815. Fix memory leaks in JobTracker. (Arun C Murthy via cutting) + + 4. HADOOP-600. Fix a race condition in JobTracker. + (Arun C Murthy via cutting) + + 5. HADOOP-864. Fix 'bin/hadoop -jar' to operate correctly when + hadoop.tmp.dir does not yet exist. (omalley via cutting) + + 6. HADOOP-866. Fix 'dfs -get' command to remove existing crc files, + if any. (Milind Bhandarkar via cutting) + + 7. HADOOP-871. Fix a bug in bin/hadoop setting JAVA_LIBRARY_PATH. + (Arun C Murthy via cutting) + + 8. HADOOP-868. Decrease the number of open files during map, + respecting io.sort.fa ctor. (Devaraj Das via cutting) + + 9. HADOOP-865. Fix S3 FileSystem so that partially created files can + be deleted. (Tom White via cutting) + +10. HADOOP-873. Pass java.library.path correctly to child processes. + (omalley via cutting) + +11. HADOOP-851. Add support for the LZO codec. This is much faster + than the default, zlib-based compression, but it is only available + when the native library is built. (Arun C Murthy via cutting) + +12. HADOOP-880. Fix S3 FileSystem to remove directories. + (Tom White via cutting) + +13. HADOOP-879. Fix InputFormatBase to handle output generated by + MapFileOutputFormat. (cutting) + +14. HADOOP-659. In HDFS, prioritize replication of blocks based on + current replication level. Blocks which are severely + under-replicated should be further replicated before blocks which + are less under-replicated. (Hairong Kuang via cutting) + +15. HADOOP-726. Deprecate FileSystem locking methods. They are not + currently usable. Locking should eventually provided as an + independent service. (Raghu Angadi via cutting) + +16. HADOOP-758. Fix exception handling during reduce so that root + exceptions are not masked by exceptions in cleanups. + (Raghu Angadi via cutting) + + +Release 0.10.0 - 2007-01-05 + + 1. HADOOP-763. Change DFS namenode benchmark to not use MapReduce. + (Nigel Daley via cutting) + + 2. HADOOP-777. Use fully-qualified hostnames for tasktrackers and + datanodes. (Mahadev Konar via cutting) + + 3. HADOOP-621. Change 'dfs -cat' to exit sooner when output has been + closed. (Dhruba Borthakur via cutting) + + 4. HADOOP-752. Rationalize some synchronization in DFS namenode. + (Dhruba Borthakur via cutting) + + 5. HADOOP-629. Fix RPC services to better check the protocol name and + version. (omalley via cutting) + + 6. HADOOP-774. Limit the number of invalid blocks returned with + heartbeats by the namenode to datanodes. Transmitting and + processing very large invalid block lists can tie up both the + namenode and datanode for too long. (Dhruba Borthakur via cutting) + + 7. HADOOP-738. Change 'dfs -get' command to not create CRC files by + default, adding a -crc option to force their creation. + (Milind Bhandarkar via cutting) + + 8. HADOOP-676. Improved exceptions and error messages for common job + input specification errors. (Sanjay Dahiya via cutting) + + 9. [Included in 0.9.2 release] + +10. HADOOP-756. Add new dfsadmin option to wait for filesystem to be + operational. (Dhruba Borthakur via cutting) + +11. HADOOP-770. Fix jobtracker web interface to display, on restart, + jobs that were running when it was last stopped. + (Sanjay Dahiya via cutting) + +12. HADOOP-331. Write all map outputs to a single file with an index, + rather than to a separate file per reduce task. This should both + speed the shuffle and make things more scalable. + (Devaraj Das via cutting) + +13. HADOOP-818. Fix contrib unit tests to not depend on core unit + tests. (omalley via cutting) + +14. HADOOP-786. Log common exception at debug level. + (Sanjay Dahiya via cutting) + +15. HADOOP-796. Provide more convenient access to failed task + information in the web interface. (Sanjay Dahiya via cutting) + +16. HADOOP-764. Reduce memory allocations in namenode some. + (Dhruba Borthakur via cutting) + +17. HADOOP-802. Update description of mapred.speculative.execution to + mention reduces. (Nigel Daley via cutting) + +18. HADOOP-806. Include link to datanodes on front page of namenode + web interface. (Raghu Angadi via cutting) + +19. HADOOP-618. Make JobSubmissionProtocol public. + (Arun C Murthy via cutting) + +20. HADOOP-782. Fully remove killed tasks. (Arun C Murthy via cutting) + +21. HADOOP-792. Fix 'dfs -mv' to return correct status. + (Dhruba Borthakur via cutting) + +22. HADOOP-673. Give each task its own working directory again. + (Mahadev Konar via cutting) + +23. HADOOP-571. Extend the syntax of Path to be a URI; to be + optionally qualified with a scheme and authority. The scheme + determines the FileSystem implementation, while the authority + determines the FileSystem instance. New FileSystem + implementations may be provided by defining an fs..impl + property, naming the FileSystem implementation class. This + permits easy integration of new FileSystem implementations. + (cutting) + +24. HADOOP-720. Add an HDFS white paper to website. + (Dhruba Borthakur via cutting) + +25. HADOOP-794. Fix a divide-by-zero exception when a job specifies + zero map tasks. (omalley via cutting) + +26. HADOOP-454. Add a 'dfs -dus' command that provides summary disk + usage. (Hairong Kuang via cutting) + +27. HADOOP-574. Add an Amazon S3 implementation of FileSystem. To + use this, one need only specify paths of the form + s3://id:secret@bucket/. Alternately, the AWS access key id and + secret can be specified in your config, with the properties + fs.s3.awsAccessKeyId and fs.s3.awsSecretAccessKey. + (Tom White via cutting) + +28. HADOOP-824. Rename DFSShell to be FsShell, since it applies + generically to all FileSystem implementations. (cutting) + +29. HADOOP-813. Fix map output sorting to report progress, so that + sorts which take longer than the task timeout do not fail. + (Devaraj Das via cutting) + +30. HADOOP-825. Fix HDFS daemons when configured with new URI syntax. + (omalley via cutting) + +31. HADOOP-596. Fix a bug in phase reporting during reduce. + (Sanjay Dahiya via cutting) + +32. HADOOP-811. Add a utility, MultithreadedMapRunner. + (Alejandro Abdelnur via cutting) + +33. HADOOP-829. Within HDFS, clearly separate three different + representations for datanodes: one for RPCs, one for + namenode-internal use, and one for namespace persistence. + (Dhruba Borthakur via cutting) + +34. HADOOP-823. Fix problem starting datanode when not all configured + data directories exist. (Bryan Pendleton via cutting) + +35. HADOOP-451. Add a Split interface. CAUTION: This incompatibly + changes the InputFormat and RecordReader interfaces. Not only is + FileSplit replaced with Split, but a FileSystem parameter is no + longer passed in several methods, input validation has changed, + etc. (omalley via cutting) + +36. HADOOP-814. Optimize locking in namenode. (Dhruba Borthakur via cutting) + +37. HADOOP-738. Change 'fs -put' and 'fs -get' commands to accept + standard input and output, respectively. Standard i/o is + specified by a file named '-'. (Wendy Chien via cutting) + +38. HADOOP-835. Fix a NullPointerException reading record-compressed + SequenceFiles. (Hairong Kuang via cutting) + +39. HADOOP-836. Fix a MapReduce bug on Windows, where the wrong + FileSystem was used. Also add a static FileSystem.getLocal() + method and better Path checking in HDFS, to help avoid such issues + in the future. (omalley via cutting) + +40. HADOOP-837. Improve RunJar utility to unpack jar file + hadoop.tmp.dir, rather than the system temporary directory. + (Hairong Kuang via cutting) + +41. HADOOP-841. Fix native library to build 32-bit version even when + on a 64-bit host, if a 32-bit JVM is used. (Arun C Murthy via cutting) + +42. HADOOP-838. Fix tasktracker to pass java.library.path to + sub-processes, so that libhadoop.a is found. + (Arun C Murthy via cutting) + +43. HADOOP-844. Send metrics messages on a fixed-delay schedule + instead of a fixed-rate schedule. (David Bowen via cutting) + +44. HADOOP-849. Fix OutOfMemory exceptions in TaskTracker due to a + file handle leak in SequenceFile. (Devaraj Das via cutting) + +45. HADOOP-745. Fix a synchronization bug in the HDFS namenode. + (Dhruba Borthakur via cutting) + +46. HADOOP-850. Add Writable implementations for variable-length + integers. (ab via cutting) + +47. HADOOP-525. Add raw comparators to record types. This greatly + improves record sort performance. (Milind Bhandarkar via cutting) + +48. HADOOP-628. Fix a problem with 'fs -cat' command, where some + characters were replaced with question marks. (Wendy Chien via cutting) + +49. HADOOP-804. Reduce verbosity of MapReduce logging. + (Sanjay Dahiya via cutting) + +50. HADOOP-853. Rename 'site' to 'docs', in preparation for inclusion + in releases. (cutting) + +51. HADOOP-371. Include contrib jars and site documentation in + distributions. Also add contrib and example documentation to + distributed javadoc, in separate sections. (Nigel Daley via cutting) + +52. HADOOP-846. Report progress during entire map, as sorting of + intermediate outputs may happen at any time, potentially causing + task timeouts. (Devaraj Das via cutting) + +53. HADOOP-840. In task tracker, queue task cleanups and perform them + in a separate thread. (omalley & Mahadev Konar via cutting) + +54. HADOOP-681. Add to HDFS the ability to decommission nodes. This + causes their blocks to be re-replicated on other nodes, so that + they may be removed from a cluster. (Dhruba Borthakur via cutting) + +55. HADOOP-470. In HDFS web ui, list the datanodes containing each + copy of a block. (Hairong Kuang via cutting) + +56. HADOOP-700. Change bin/hadoop to only include core jar file on + classpath, not example, test, etc. Also rename core jar to + hadoop-${version}-core.jar so that it can be more easily + identified. (Nigel Daley via cutting) + +57. HADOOP-619. Extend InputFormatBase to accept individual files and + glob patterns as MapReduce inputs, not just directories. Also + change contrib/streaming to use this. (Sanjay Dahia via cutting) + + +Release 0.9.2 - 2006-12-15 + + 1. HADOOP-639. Restructure InterTrackerProtocol to make task + accounting more reliable. (Arun C Murthy via cutting) + + 2. HADOOP-827. Turn off speculative execution by default, since it's + currently broken. (omalley via cutting) + + 3. HADOOP-791. Fix a deadlock in the task tracker. + (Mahadev Konar via cutting) + + +Release 0.9.1 - 2006-12-06 + + 1. HADOOP-780. Use ReflectionUtils to instantiate key and value + objects. (ab) + + 2. HADOOP-779. Fix contrib/streaming to work correctly with gzipped + input files. (Hairong Kuang via cutting) + + +Release 0.9.0 - 2006-12-01 + + 1. HADOOP-655. Remove most deprecated code. A few deprecated things + remain, notably UTF8 and some methods that are still required. + Also cleaned up constructors for SequenceFile, MapFile, SetFile, + and ArrayFile a bit. (cutting) + + 2. HADOOP-565. Upgrade to Jetty version 6. (Sanjay Dahiya via cutting) + + 3. HADOOP-682. Fix DFS format command to work correctly when + configured with a non-existent directory. (Sanjay Dahiya via cutting) + + 4. HADOOP-645. Fix a bug in contrib/streaming when -reducer is NONE. + (Dhruba Borthakur via cutting) + + 5. HADOOP-687. Fix a classpath bug in bin/hadoop that blocked the + servers from starting. (Sameer Paranjpye via omalley) + + 6. HADOOP-683. Remove a script dependency on bash, so it works with + dash, the new default for /bin/sh on Ubuntu. (James Todd via cutting) + + 7. HADOOP-382. Extend unit tests to run multiple datanodes. + (Milind Bhandarkar via cutting) + + 8. HADOOP-604. Fix some synchronization issues and a + NullPointerException in DFS datanode. (Raghu Angadi via cutting) + + 9. HADOOP-459. Fix memory leaks and a host of other issues with + libhdfs. (Sameer Paranjpye via cutting) + +10. HADOOP-694. Fix a NullPointerException in jobtracker. + (Mahadev Konar via cutting) + +11. HADOOP-637. Fix a memory leak in the IPC server. Direct buffers + are not collected like normal buffers, and provided little + advantage. (Raghu Angadi via cutting) + +12. HADOOP-696. Fix TestTextInputFormat unit test to not rely on the + order of directory listings. (Sameer Paranjpye via cutting) + +13. HADOOP-611. Add support for iterator-based merging to + SequenceFile. (Devaraj Das via cutting) + +14. HADOOP-688. Move DFS administrative commands to a separate + command named 'dfsadmin'. (Dhruba Borthakur via cutting) + +15. HADOOP-708. Fix test-libhdfs to return the correct status, so + that failures will break the build. (Nigel Daley via cutting) + +16. HADOOP-646. Fix namenode to handle edits files larger than 2GB. + (Milind Bhandarkar via cutting) + +17. HADOOP-705. Fix a bug in the JobTracker when failed jobs were + not completely cleaned up. (Mahadev Konar via cutting) + +18. HADOOP-613. Perform final merge while reducing. This removes one + sort pass over the data and should consequently significantly + decrease overall processing time. (Devaraj Das via cutting) + +19. HADOOP-661. Make each job's configuration visible through the web + ui. (Arun C Murthy via cutting) + +20. HADOOP-489. In MapReduce, separate user logs from system logs. + Each task's log output is now available through the web ui. (Arun + C Murthy via cutting) + +21. HADOOP-712. Fix record io's xml serialization to correctly handle + control-characters. (Milind Bhandarkar via cutting) + +22. HADOOP-668. Improvements to the web-based DFS browser. + (Hairong Kuang via cutting) + +23. HADOOP-715. Fix build.xml so that test logs are written in build + directory, rather than in CWD. (Arun C Murthy via cutting) + +24. HADOOP-538. Add support for building an optional native library, + libhadoop.so, that improves the performance of zlib-based + compression. To build this, specify -Dcompile.native to Ant. + (Arun C Murthy via cutting) + +25. HADOOP-610. Fix an problem when the DFS block size is configured + to be smaller than the buffer size, typically only when debugging. + (Milind Bhandarkar via cutting) + +26. HADOOP-695. Fix a NullPointerException in contrib/streaming. + (Hairong Kuang via cutting) + +27. HADOOP-652. In DFS, when a file is deleted, the block count is + now decremented. (Vladimir Krokhmalyov via cutting) + +28. HADOOP-725. In DFS, optimize block placement algorithm, + previously a performance bottleneck. (Milind Bhandarkar via cutting) + +29. HADOOP-723. In MapReduce, fix a race condition during the + shuffle, which resulted in FileNotFoundExceptions. (omalley via cutting) + +30. HADOOP-447. In DFS, fix getBlockSize(Path) to work with relative + paths. (Raghu Angadi via cutting) + +31. HADOOP-733. Make exit codes in DFShell consistent and add a unit + test. (Dhruba Borthakur via cutting) + +32. HADOOP-709. Fix contrib/streaming to work with commands that + contain control characters. (Dhruba Borthakur via cutting) + +33. HADOOP-677. In IPC, permit a version header to be transmitted + when connections are established. This will permit us to change + the format of IPC requests back-compatibly in subsequent releases. + (omalley via cutting) + +34. HADOOP-699. Fix DFS web interface so that filesystem browsing + works correctly, using the right port number. Also add support + for sorting datanode list by various columns. + (Raghu Angadi via cutting) + +35. HADOOP-76. Implement speculative reduce. Now when a job is + configured for speculative execution, both maps and reduces will + execute speculatively. Reduce outputs are written to temporary + location and moved to the final location when reduce is complete. + (Sanjay Dahiya via cutting) + +36. HADOOP-736. Roll back to Jetty 5.1.4, due to performance problems + with Jetty 6.0.1. + +37. HADOOP-739. Fix TestIPC to use different port number, making it + more reliable. (Nigel Daley via cutting) + +38. HADOOP-749. Fix a NullPointerException in jobfailures.jsp. + (omalley via cutting) + +39. HADOOP-747. Fix record serialization to work correctly when + records are embedded in Maps. (Milind Bhandarkar via cutting) + +40. HADOOP-698. Fix HDFS client not to retry the same datanode on + read failures. (Milind Bhandarkar via cutting) + +41. HADOOP-689. Add GenericWritable, to facilitate polymorphism in + MapReduce, SequenceFile, etc. (Feng Jiang via cutting) + +42. HADOOP-430. Stop datanode's HTTP server when registration with + namenode fails. (Wendy Chien via cutting) + +43. HADOOP-750. Fix a potential race condition during mapreduce + shuffle. (omalley via cutting) + +44. HADOOP-728. Fix contrib/streaming-related issues, including + '-reducer NONE'. (Sanjay Dahiya via cutting) + + +Release 0.8.0 - 2006-11-03 + + 1. HADOOP-477. Extend contrib/streaming to scan the PATH environment + variables when resolving executable program names. + (Dhruba Borthakur via cutting) + + 2. HADOOP-583. In DFSClient, reduce the log level of re-connect + attempts from 'info' to 'debug', so they are not normally shown. + (Konstantin Shvachko via cutting) + + 3. HADOOP-498. Re-implement DFS integrity checker to run server-side, + for much improved performance. (Milind Bhandarkar via cutting) + + 4. HADOOP-586. Use the jar name for otherwise un-named jobs. + (Sanjay Dahiya via cutting) + + 5. HADOOP-514. Make DFS heartbeat interval configurable. + (Milind Bhandarkar via cutting) + + 6. HADOOP-588. Fix logging and accounting of failed tasks. + (Sanjay Dahiya via cutting) + + 7. HADOOP-462. Improve command line parsing in DFSShell, so that + incorrect numbers of arguments result in informative errors rather + than ArrayOutOfBoundsException. (Dhruba Borthakur via cutting) + + 8. HADOOP-561. Fix DFS so that one replica of each block is written + locally, if possible. This was the intent, but there as a bug. + (Dhruba Borthakur via cutting) + + 9. HADOOP-610. Fix TaskTracker to survive more exceptions, keeping + tasks from becoming lost. (omalley via cutting) + +10. HADOOP-625. Add a servlet to all http daemons that displays a + stack dump, useful for debugging. (omalley via cutting) + +11. HADOOP-554. Fix DFSShell to return -1 for errors. + (Dhruba Borthakur via cutting) + +12. HADOOP-626. Correct the documentation in the NNBench example + code, and also remove a mistaken call there. + (Nigel Daley via cutting) + +13. HADOOP-634. Add missing license to many files. + (Nigel Daley via cutting) + +14. HADOOP-627. Fix some synchronization problems in MiniMRCluster + that sometimes caused unit tests to fail. (Nigel Daley via cutting) + +15. HADOOP-563. Improve the NameNode's lease policy so that leases + are held for one hour without renewal (instead of one minute). + However another attempt to create the same file will still succeed + if the lease has not been renewed within a minute. This prevents + communication or scheduling problems from causing a write to fail + for up to an hour, barring some other process trying to create the + same file. (Dhruba Borthakur via cutting) + +16. HADOOP-635. In DFSShell, permit specification of multiple files + as the source for file copy and move commands. + (Dhruba Borthakur via cutting) + +17. HADOOP-641. Change NameNode to request a fresh block report from + a re-discovered DataNode, so that no-longer-needed replications + are stopped promptly. (Konstantin Shvachko via cutting) + +18. HADOOP-642. Change IPC client to specify an explicit connect + timeout. (Konstantin Shvachko via cutting) + +19. HADOOP-638. Fix an unsynchronized access to TaskTracker's + internal state. (Nigel Daley via cutting) + +20. HADOOP-624. Fix servlet path to stop a Jetty warning on startup. + (omalley via cutting) + +21. HADOOP-578. Failed tasks are no longer placed at the end of the + task queue. This was originally done to work around other + problems that have now been fixed. Re-executing failed tasks + sooner causes buggy jobs to fail faster. (Sanjay Dahiya via cutting) + +22. HADOOP-658. Update source file headers per Apache policy. (cutting) + +23. HADOOP-636. Add MapFile & ArrayFile constructors which accept a + Progressable, and pass it down to SequenceFile. This permits + reduce tasks which use MapFile to still report progress while + writing blocks to the filesystem. (cutting) + +24. HADOOP-576. Enable contrib/streaming to use the file cache. Also + extend the cache to permit symbolic links to cached items, rather + than local file copies. (Mahadev Konar via cutting) + +25. HADOOP-482. Fix unit tests to work when a cluster is running on + the same machine, removing port conflicts. (Wendy Chien via cutting) + +26. HADOOP-90. Permit dfs.name.dir to list multiple directories, + where namenode data is to be replicated. (Milind Bhandarkar via cutting) + +27. HADOOP-651. Fix DFSCk to correctly pass parameters to the servlet + on the namenode. (Milind Bhandarkar via cutting) + +28. HADOOP-553. Change main() routines of DataNode and NameNode to + log exceptions rather than letting the JVM print them to standard + error. Also, change the hadoop-daemon.sh script to rotate + standard i/o log files. (Raghu Angadi via cutting) + +29. HADOOP-399. Fix javadoc warnings. (Nigel Daley via cutting) + +30. HADOOP-599. Fix web ui and command line to correctly report DFS + filesystem size statistics. Also improve web layout. + (Raghu Angadi via cutting) + +31. HADOOP-660. Permit specification of junit test output format. + (Nigel Daley via cutting) + +32. HADOOP-663. Fix a few unit test issues. (Mahadev Konar via cutting) + +33. HADOOP-664. Cause entire build to fail if libhdfs tests fail. + (Nigel Daley via cutting) + +34. HADOOP-633. Keep jobtracker from dying when job initialization + throws exceptions. Also improve exception handling in a few other + places and add more informative thread names. + (omalley via cutting) + +35. HADOOP-669. Fix a problem introduced by HADOOP-90 that can cause + DFS to lose files. (Milind Bhandarkar via cutting) + +36. HADOOP-373. Consistently check the value returned by + FileSystem.mkdirs(). (Wendy Chien via cutting) + +37. HADOOP-670. Code cleanups in some DFS internals: use generic + types, replace Vector with ArrayList, etc. + (Konstantin Shvachko via cutting) + +38. HADOOP-647. Permit map outputs to use a different compression + type than the job output. (omalley via cutting) + +39. HADOOP-671. Fix file cache to check for pre-existence before + creating . (Mahadev Konar via cutting) + +40. HADOOP-665. Extend many DFSShell commands to accept multiple + arguments. Now commands like "ls", "rm", etc. will operate on + multiple files. (Dhruba Borthakur via cutting) + + +Release 0.7.2 - 2006-10-18 + + 1. HADOOP-607. Fix a bug where classes included in job jars were not + found by tasks. (Mahadev Konar via cutting) + + 2. HADOOP-609. Add a unit test that checks that classes in job jars + can be found by tasks. Also modify unit tests to specify multiple + local directories. (Mahadev Konar via cutting) + + +Release 0.7.1 - 2006-10-11 + + 1. HADOOP-593. Fix a NullPointerException in the JobTracker. + (omalley via cutting) + + 2. HADOOP-592. Fix a NullPointerException in the IPC Server. Also + consistently log when stale calls are discarded. (omalley via cutting) + + 3. HADOOP-594. Increase the DFS safe-mode threshold from .95 to + .999, so that nearly all blocks must be reported before filesystem + modifications are permitted. (Konstantin Shvachko via cutting) + + 4. HADOOP-598. Fix tasks to retry when reporting completion, so that + a single RPC timeout won't fail a task. (omalley via cutting) + + 5. HADOOP-597. Fix TaskTracker to not discard map outputs for errors + in transmitting them to reduce nodes. (omalley via cutting) + + +Release 0.7.0 - 2006-10-06 + + 1. HADOOP-243. Fix rounding in the display of task and job progress + so that things are not shown to be 100% complete until they are in + fact finished. (omalley via cutting) + + 2. HADOOP-438. Limit the length of absolute paths in DFS, since the + file format used to store pathnames has some limitations. + (Wendy Chien via cutting) + + 3. HADOOP-530. Improve error messages in SequenceFile when keys or + values are of the wrong type. (Hairong Kuang via cutting) + + 4. HADOOP-288. Add a file caching system and use it in MapReduce to + cache job jar files on slave nodes. (Mahadev Konar via cutting) + + 5. HADOOP-533. Fix unit test to not modify conf directory. + (Hairong Kuang via cutting) + + 6. HADOOP-527. Permit specification of the local address that various + Hadoop daemons should bind to. (Philippe Gassmann via cutting) + + 7. HADOOP-542. Updates to contrib/streaming: reformatted source code, + on-the-fly merge sort, a fix for HADOOP-540, etc. + (Michel Tourn via cutting) + + 8. HADOOP-545. Remove an unused config file parameter. + (Philippe Gassmann via cutting) + + 9. HADOOP-548. Add an Ant property "test.output" to build.xml that + causes test output to be logged to the console. (omalley via cutting) + +10. HADOOP-261. Record an error message when map output is lost. + (omalley via cutting) + +11. HADOOP-293. Report the full list of task error messages in the + web ui, not just the most recent. (omalley via cutting) + +12. HADOOP-551. Restore JobClient's console printouts to only include + a maximum of one update per one percent of progress. + (omalley via cutting) + +13. HADOOP-306. Add a "safe" mode to DFS. The name node enters this + when less than a specified percentage of file data is complete. + Currently safe mode is only used on startup, but eventually it + will also be entered when datanodes disconnect and file data + becomes incomplete. While in safe mode no filesystem + modifications are permitted and block replication is inhibited. + (Konstantin Shvachko via cutting) + +14. HADOOP-431. Change 'dfs -rm' to not operate recursively and add a + new command, 'dfs -rmr' which operates recursively. + (Sameer Paranjpye via cutting) + +15. HADOOP-263. Include timestamps for job transitions. The web + interface now displays the start and end times of tasks and the + start times of sorting and reducing for reduce tasks. Also, + extend ObjectWritable to handle enums, so that they can be passed + as RPC parameters. (Sanjay Dahiya via cutting) + +16. HADOOP-556. Contrib/streaming: send keep-alive reports to task + tracker every 10 seconds rather than every 100 records, to avoid + task timeouts. (Michel Tourn via cutting) + +17. HADOOP-547. Fix reduce tasks to ping tasktracker while copying + data, rather than only between copies, avoiding task timeouts. + (Sanjay Dahiya via cutting) + +18. HADOOP-537. Fix src/c++/libhdfs build process to create files in + build/, no longer modifying the source tree. + (Arun C Murthy via cutting) + +19. HADOOP-487. Throw a more informative exception for unknown RPC + hosts. (Sameer Paranjpye via cutting) + +20. HADOOP-559. Add file name globbing (pattern matching) support to + the FileSystem API, and use it in DFSShell ('bin/hadoop dfs') + commands. (Hairong Kuang via cutting) + +21. HADOOP-508. Fix a bug in FSDataInputStream. Incorrect data was + returned after seeking to a random location. + (Milind Bhandarkar via cutting) + +22. HADOOP-560. Add a "killed" task state. This can be used to + distinguish kills from other failures. Task state has also been + converted to use an enum type instead of an int, uncovering a bug + elsewhere. The web interface is also updated to display killed + tasks. (omalley via cutting) + +23. HADOOP-423. Normalize Paths containing directories named "." and + "..", using the standard, unix interpretation. Also add checks in + DFS, prohibiting the use of "." or ".." as directory or file + names. (Wendy Chien via cutting) + +24. HADOOP-513. Replace map output handling with a servlet, rather + than a JSP page. This fixes an issue where + IllegalStateException's were logged, sets content-length + correctly, and better handles some errors. (omalley via cutting) + +25. HADOOP-552. Improved error checking when copying map output files + to reduce nodes. (omalley via cutting) + +26. HADOOP-566. Fix scripts to work correctly when accessed through + relative symbolic links. (Lee Faris via cutting) + +27. HADOOP-519. Add positioned read methods to FSInputStream. These + permit one to read from a stream without moving its position, and + can hence be performed by multiple threads at once on a single + stream. Implement an optimized version for DFS and local FS. + (Milind Bhandarkar via cutting) + +28. HADOOP-522. Permit block compression with MapFile and SetFile. + Since these formats are always sorted, block compression can + provide a big advantage. (cutting) + +29. HADOOP-567. Record version and revision information in builds. A + package manifest is added to the generated jar file containing + version information, and a VersionInfo utility is added that + includes further information, including the build date and user, + and the subversion revision and repository. A 'bin/hadoop + version' comand is added to show this information, and it is also + added to various web interfaces. (omalley via cutting) + +30. HADOOP-568. Fix so that errors while initializing tasks on a + tasktracker correctly report the task as failed to the jobtracker, + so that it will be rescheduled. (omalley via cutting) + +31. HADOOP-550. Disable automatic UTF-8 validation in Text. This + permits, e.g., TextInputFormat to again operate on non-UTF-8 data. + (Hairong and Mahadev via cutting) + +32. HADOOP-343. Fix mapred copying so that a failed tasktracker + doesn't cause other copies to slow. (Sameer Paranjpye via cutting) + +33. HADOOP-239. Add a persistent job history mechanism, so that basic + job statistics are not lost after 24 hours and/or when the + jobtracker is restarted. (Sanjay Dahiya via cutting) + +34. HADOOP-506. Ignore heartbeats from stale task trackers. + (Sanjay Dahiya via cutting) + +35. HADOOP-255. Discard stale, queued IPC calls. Do not process + calls whose clients will likely time out before they receive a + response. When the queue is full, new calls are now received and + queued, and the oldest calls are discarded, so that, when servers + get bogged down, they no longer develop a backlog on the socket. + This should improve some DFS namenode failure modes. + (omalley via cutting) + +36. HADOOP-581. Fix datanode to not reset itself on communications + errors with the namenode. If a request to the namenode fails, the + datanode should retry, not restart. This reduces the load on the + namenode, since restarts cause a resend of the block report. + (omalley via cutting) + + +Release 0.6.2 - 2006-09-18 + +1. HADOOP-532. Fix a bug reading value-compressed sequence files, + where an exception was thrown reporting that the full value had not + been read. (omalley via cutting) + +2. HADOOP-534. Change the default value class in JobConf to be Text + instead of the now-deprecated UTF8. This fixes the Grep example + program, which was updated to use Text, but relies on this + default. (Hairong Kuang via cutting) + + +Release 0.6.1 - 2006-09-13 + + 1. HADOOP-520. Fix a bug in libhdfs, where write failures were not + correctly returning error codes. (Arun C Murthy via cutting) + + 2. HADOOP-523. Fix a NullPointerException when TextInputFormat is + explicitly specified. Also add a test case for this. + (omalley via cutting) + + 3. HADOOP-521. Fix another NullPointerException finding the + ClassLoader when using libhdfs. (omalley via cutting) + + 4. HADOOP-526. Fix a NullPointerException when attempting to start + two datanodes in the same directory. (Milind Bhandarkar via cutting) + + 5. HADOOP-529. Fix a NullPointerException when opening + value-compressed sequence files generated by pre-0.6.0 Hadoop. + (omalley via cutting) + + +Release 0.6.0 - 2006-09-08 + + 1. HADOOP-427. Replace some uses of DatanodeDescriptor in the DFS + web UI code with DatanodeInfo, the preferred public class. + (Devaraj Das via cutting) + + 2. HADOOP-426. Fix streaming contrib module to work correctly on + Solaris. This was causing nightly builds to fail. + (Michel Tourn via cutting) + + 3. HADOOP-400. Improvements to task assignment. Tasks are no longer + re-run on nodes where they have failed (unless no other node is + available). Also, tasks are better load-balanced among nodes. + (omalley via cutting) + + 4. HADOOP-324. Fix datanode to not exit when a disk is full, but + rather simply to fail writes. (Wendy Chien via cutting) + + 5. HADOOP-434. Change smallJobsBenchmark to use standard Hadoop + scripts. (Sanjay Dahiya via cutting) + + 6. HADOOP-453. Fix a bug in Text.setCapacity(). (siren via cutting) + + + 7. HADOOP-450. Change so that input types are determined by the + RecordReader rather than specified directly in the JobConf. This + facilitates jobs with a variety of input types. + + WARNING: This contains incompatible API changes! The RecordReader + interface has two new methods that all user-defined InputFormats + must now define. Also, the values returned by TextInputFormat are + no longer of class UTF8, but now of class Text. + + 8. HADOOP-436. Fix an error-handling bug in the web ui. + (Devaraj Das via cutting) + + 9. HADOOP-455. Fix a bug in Text, where DEL was not permitted. + (Hairong Kuang via cutting) + +10. HADOOP-456. Change the DFS namenode to keep a persistent record + of the set of known datanodes. This will be used to implement a + "safe mode" where filesystem changes are prohibited when a + critical percentage of the datanodes are unavailable. + (Konstantin Shvachko via cutting) + +11. HADOOP-322. Add a job control utility. This permits one to + specify job interdependencies. Each job is submitted only after + the jobs it depends on have successfully completed. + (Runping Qi via cutting) + +12. HADOOP-176. Fix a bug in IntWritable.Comparator. + (Dick King via cutting) + +13. HADOOP-421. Replace uses of String in recordio package with Text + class, for improved handling of UTF-8 data. + (Milind Bhandarkar via cutting) + +14. HADOOP-464. Improved error message when job jar not found. + (Michel Tourn via cutting) + +15. HADOOP-469. Fix /bin/bash specifics that have crept into our + /bin/sh scripts since HADOOP-352. + (Jean-Baptiste Quenot via cutting) + +16. HADOOP-468. Add HADOOP_NICENESS environment variable to set + scheduling priority for daemons. (Vetle Roeim via cutting) + +17. HADOOP-473. Fix TextInputFormat to correctly handle more EOL + formats. Things now work correctly with CR, LF or CRLF. + (Dennis Kubes & James White via cutting) + +18. HADOOP-461. Make Java 1.5 an explicit requirement. (cutting) + +19. HADOOP-54. Add block compression to SequenceFile. One may now + specify that blocks of keys and values are compressed together, + improving compression for small keys and values. + SequenceFile.Writer's constructor is now deprecated and replaced + with a factory method. (Arun C Murthy via cutting) + +20. HADOOP-281. Prohibit DFS files that are also directories. + (Wendy Chien via cutting) + +21. HADOOP-486. Add the job username to JobStatus instances returned + by JobClient. (Mahadev Konar via cutting) + +22. HADOOP-437. contrib/streaming: Add support for gzipped inputs. + (Michel Tourn via cutting) + +23. HADOOP-463. Add variable expansion to config files. + Configuration property values may now contain variable + expressions. A variable is referenced with the syntax + '${variable}'. Variables values are found first in the + configuration, and then in Java system properties. The default + configuration is modified so that temporary directories are now + under ${hadoop.tmp.dir}, which is, by default, + /tmp/hadoop-${user.name}. (Michel Tourn via cutting) + +24. HADOOP-419. Fix a NullPointerException finding the ClassLoader + when using libhdfs. (omalley via cutting) + +25. HADOOP-460. Fix contrib/smallJobsBenchmark to use Text instead of + UTF8. (Sanjay Dahiya via cutting) + +26. HADOOP-196. Fix Configuration(Configuration) constructor to work + correctly. (Sami Siren via cutting) + +27. HADOOP-501. Fix Configuration.toString() to handle URL resources. + (Thomas Friol via cutting) + +28. HADOOP-499. Reduce the use of Strings in contrib/streaming, + replacing them with Text for better performance. + (Hairong Kuang via cutting) + +29. HADOOP-64. Manage multiple volumes with a single DataNode. + Previously DataNode would create a separate daemon per configured + volume, each with its own connection to the NameNode. Now all + volumes are handled by a single DataNode daemon, reducing the load + on the NameNode. (Milind Bhandarkar via cutting) + +30. HADOOP-424. Fix MapReduce so that jobs which generate zero splits + do not fail. (Fr??d??ric Bertin via cutting) + +31. HADOOP-408. Adjust some timeouts and remove some others so that + unit tests run faster. (cutting) + +32. HADOOP-507. Fix an IllegalAccessException in DFS. + (omalley via cutting) + +33. HADOOP-320. Fix so that checksum files are correctly copied when + the destination of a file copy is a directory. + (Hairong Kuang via cutting) + +34. HADOOP-286. In DFSClient, avoid pinging the NameNode with + renewLease() calls when no files are being written. + (Konstantin Shvachko via cutting) + +35. HADOOP-312. Close idle IPC connections. All IPC connections were + cached forever. Now, after a connection has been idle for more + than a configurable amount of time (one second by default), the + connection is closed, conserving resources on both client and + server. (Devaraj Das via cutting) + +36. HADOOP-497. Permit the specification of the network interface and + nameserver to be used when determining the local hostname + advertised by datanodes and tasktrackers. + (Lorenzo Thione via cutting) + +37. HADOOP-441. Add a compression codec API and extend SequenceFile + to use it. This will permit the use of alternate compression + codecs in SequenceFile. (Arun C Murthy via cutting) + +38. HADOOP-483. Improvements to libhdfs build and documentation. + (Arun C Murthy via cutting) + +39. HADOOP-458. Fix a memory corruption bug in libhdfs. + (Arun C Murthy via cutting) + +40. HADOOP-517. Fix a contrib/streaming bug in end-of-line detection. + (Hairong Kuang via cutting) + +41. HADOOP-474. Add CompressionCodecFactory, and use it in + TextInputFormat and TextOutputFormat. Compressed input files are + automatically decompressed when they have the correct extension. + Output files will, when output compression is specified, be + generated with an approprate extension. Also add a gzip codec and + fix problems with UTF8 text inputs. (omalley via cutting) + + +Release 0.5.0 - 2006-08-04 + + 1. HADOOP-352. Fix shell scripts to use /bin/sh instead of + /bin/bash, for better portability. + (Jean-Baptiste Quenot via cutting) + + 2. HADOOP-313. Permit task state to be saved so that single tasks + may be manually re-executed when debugging. (omalley via cutting) + + 3. HADOOP-339. Add method to JobClient API listing jobs that are + not yet complete, i.e., that are queued or running. + (Mahadev Konar via cutting) + + 4. HADOOP-355. Updates to the streaming contrib module, including + API fixes, making reduce optional, and adding an input type for + StreamSequenceRecordReader. (Michel Tourn via cutting) + + 5. HADOOP-358. Fix a NPE bug in Path.equals(). + (Fr??d??ric Bertin via cutting) + + 6. HADOOP-327. Fix ToolBase to not call System.exit() when + exceptions are thrown. (Hairong Kuang via cutting) + + 7. HADOOP-359. Permit map output to be compressed. + (omalley via cutting) + + 8. HADOOP-341. Permit input URI to CopyFiles to use the HTTP + protocol. This lets one, e.g., more easily copy log files into + DFS. (Arun C Murthy via cutting) + + 9. HADOOP-361. Remove unix dependencies from streaming contrib + module tests, making them pure java. (Michel Tourn via cutting) + +10. HADOOP-354. Make public methods to stop DFS daemons. + (Barry Kaplan via cutting) + +11. HADOOP-252. Add versioning to RPC protocols. + (Milind Bhandarkar via cutting) + +12. HADOOP-356. Add contrib to "compile" and "test" build targets, so + that this code is better maintained. (Michel Tourn via cutting) + +13. HADOOP-307. Add smallJobsBenchmark contrib module. This runs + lots of small jobs, in order to determine per-task overheads. + (Sanjay Dahiya via cutting) + +14. HADOOP-342. Add a tool for log analysis: Logalyzer. + (Arun C Murthy via cutting) + +15. HADOOP-347. Add web-based browsing of DFS content. The namenode + redirects browsing requests to datanodes. Content requests are + redirected to datanodes where the data is local when possible. + (Devaraj Das via cutting) + +16. HADOOP-351. Make Hadoop IPC kernel independent of Jetty. + (Devaraj Das via cutting) + +17. HADOOP-237. Add metric reporting to DFS and MapReduce. With only + minor configuration changes, one can now monitor many Hadoop + system statistics using Ganglia or other monitoring systems. + (Milind Bhandarkar via cutting) + +18. HADOOP-376. Fix datanode's HTTP server to scan for a free port. + (omalley via cutting) + +19. HADOOP-260. Add --config option to shell scripts, specifying an + alternate configuration directory. (Milind Bhandarkar via cutting) + +20. HADOOP-381. Permit developers to save the temporary files for + tasks whose names match a regular expression, to facilliate + debugging. (omalley via cutting) + +21. HADOOP-344. Fix some Windows-related problems with DF. + (Konstantin Shvachko via cutting) + +22. HADOOP-380. Fix reduce tasks to poll less frequently for map + outputs. (Mahadev Konar via cutting) + +23. HADOOP-321. Refactor DatanodeInfo, in preparation for + HADOOP-306. (Konstantin Shvachko & omalley via cutting) + +24. HADOOP-385. Fix some bugs in record io code generation. + (Milind Bhandarkar via cutting) + +25. HADOOP-302. Add new Text class to replace UTF8, removing + limitations of that class. Also refactor utility methods for + writing zero-compressed integers (VInts and VLongs). + (Hairong Kuang via cutting) + +26. HADOOP-335. Refactor DFS namespace/transaction logging in + namenode. (Konstantin Shvachko via cutting) + +27. HADOOP-375. Fix handling of the datanode HTTP daemon's port so + that multiple datanode's can be run on a single host. + (Devaraj Das via cutting) + +28. HADOOP-386. When removing excess DFS block replicas, remove those + on nodes with the least free space first. + (Johan Oskarson via cutting) + +29. HADOOP-389. Fix intermittent failures of mapreduce unit tests. + Also fix some build dependencies. + (Mahadev & Konstantin via cutting) + +30. HADOOP-362. Fix a problem where jobs hang when status messages + are recieved out-of-order. (omalley via cutting) + +31. HADOOP-394. Change order of DFS shutdown in unit tests to + minimize errors logged. (Konstantin Shvachko via cutting) + +32. HADOOP-396. Make DatanodeID implement Writable. + (Konstantin Shvachko via cutting) + +33. HADOOP-377. Permit one to add URL resources to a Configuration. + (Jean-Baptiste Quenot via cutting) + +34. HADOOP-345. Permit iteration over Configuration key/value pairs. + (Michel Tourn via cutting) + +35. HADOOP-409. Streaming contrib module: make configuration + properties available to commands as environment variables. + (Michel Tourn via cutting) + +36. HADOOP-369. Add -getmerge option to dfs command that appends all + files in a directory into a single local file. + (Johan Oskarson via cutting) + +37. HADOOP-410. Replace some TreeMaps with HashMaps in DFS, for + a 17% performance improvement. (Milind Bhandarkar via cutting) + +38. HADOOP-411. Add unit tests for command line parser. + (Hairong Kuang via cutting) + +39. HADOOP-412. Add MapReduce input formats that support filtering + of SequenceFile data, including sampling and regex matching. + Also, move JobConf.newInstance() to a new utility class. + (Hairong Kuang via cutting) + +40. HADOOP-226. Fix fsck command to properly consider replication + counts, now that these can vary per file. (Bryan Pendleton via cutting) + +41. HADOOP-425. Add a Python MapReduce example, using Jython. + (omalley via cutting) + + +Release 0.4.0 - 2006-06-28 + + 1. HADOOP-298. Improved progress reports for CopyFiles utility, the + distributed file copier. (omalley via cutting) + + 2. HADOOP-299. Fix the task tracker, permitting multiple jobs to + more easily execute at the same time. (omalley via cutting) + + 3. HADOOP-250. Add an HTTP user interface to the namenode, running + on port 50070. (Devaraj Das via cutting) + + 4. HADOOP-123. Add MapReduce unit tests that run a jobtracker and + tasktracker, greatly increasing code coverage. + (Milind Bhandarkar via cutting) + + 5. HADOOP-271. Add links from jobtracker's web ui to tasktracker's + web ui. Also attempt to log a thread dump of child processes + before they're killed. (omalley via cutting) + + 6. HADOOP-210. Change RPC server to use a selector instead of a + thread per connection. This should make it easier to scale to + larger clusters. Note that this incompatibly changes the RPC + protocol: clients and servers must both be upgraded to the new + version to ensure correct operation. (Devaraj Das via cutting) + + 7. HADOOP-311. Change DFS client to retry failed reads, so that a + single read failure will not alone cause failure of a task. + (omalley via cutting) + + 8. HADOOP-314. Remove the "append" phase when reducing. Map output + files are now directly passed to the sorter, without first + appending them into a single file. Now, the first third of reduce + progress is "copy" (transferring map output to reduce nodes), the + middle third is "sort" (sorting map output) and the last third is + "reduce" (generating output). Long-term, the "sort" phase will + also be removed. (omalley via cutting) + + 9. HADOOP-316. Fix a potential deadlock in the jobtracker. + (omalley via cutting) + +10. HADOOP-319. Fix FileSystem.close() to remove the FileSystem + instance from the cache. (Hairong Kuang via cutting) + +11. HADOOP-135. Fix potential deadlock in JobTracker by acquiring + locks in a consistent order. (omalley via cutting) + +12. HADOOP-278. Check for existence of input directories before + starting MapReduce jobs, making it easier to debug this common + error. (omalley via cutting) + +13. HADOOP-304. Improve error message for + UnregisterdDatanodeException to include expected node name. + (Konstantin Shvachko via cutting) + +14. HADOOP-305. Fix TaskTracker to ask for new tasks as soon as a + task is finished, rather than waiting for the next heartbeat. + This improves performance when tasks are short. + (Mahadev Konar via cutting) + +15. HADOOP-59. Add support for generic command line options. One may + now specify the filesystem (-fs), the MapReduce jobtracker (-jt), + a config file (-conf) or any configuration property (-D). The + "dfs", "fsck", "job", and "distcp" commands currently support + this, with more to be added. (Hairong Kuang via cutting) + +16. HADOOP-296. Permit specification of the amount of reserved space + on a DFS datanode. One may specify both the percentage free and + the number of bytes. (Johan Oskarson via cutting) + +17. HADOOP-325. Fix a problem initializing RPC parameter classes, and + remove the workaround used to initialize classes. + (omalley via cutting) + +18. HADOOP-328. Add an option to the "distcp" command to ignore read + errors while copying. (omalley via cutting) + +19. HADOOP-27. Don't allocate tasks to trackers whose local free + space is too low. (Johan Oskarson via cutting) + +20. HADOOP-318. Keep slow DFS output from causing task timeouts. + This incompatibly changes some public interfaces, adding a + parameter to OutputFormat.getRecordWriter() and the new method + Reporter.progress(), but it makes lots of tasks succeed that were + previously failing. (Milind Bhandarkar via cutting) + + +Release 0.3.2 - 2006-06-09 + + 1. HADOOP-275. Update the streaming contrib module to use log4j for + its logging. (Michel Tourn via cutting) + + 2. HADOOP-279. Provide defaults for log4j logging parameters, so + that things still work reasonably when Hadoop-specific system + properties are not provided. (omalley via cutting) + + 3. HADOOP-280. Fix a typo in AllTestDriver which caused the wrong + test to be run when "DistributedFSCheck" was specified. + (Konstantin Shvachko via cutting) + + 4. HADOOP-240. DFS's mkdirs() implementation no longer logs a warning + when the directory already exists. (Hairong Kuang via cutting) + + 5. HADOOP-285. Fix DFS datanodes to be able to re-join the cluster + after the connection to the namenode is lost. (omalley via cutting) + + 6. HADOOP-277. Fix a race condition when creating directories. + (Sameer Paranjpye via cutting) + + 7. HADOOP-289. Improved exception handling in DFS datanode. + (Konstantin Shvachko via cutting) + + 8. HADOOP-292. Fix client-side logging to go to standard error + rather than standard output, so that it can be distinguished from + application output. (omalley via cutting) + + 9. HADOOP-294. Fixed bug where conditions for retrying after errors + in the DFS client were reversed. (omalley via cutting) + + +Release 0.3.1 - 2006-06-05 + + 1. HADOOP-272. Fix a bug in bin/hadoop setting log + parameters. (omalley & cutting) + + 2. HADOOP-274. Change applications to log to standard output rather + than to a rolling log file like daemons. (omalley via cutting) + + 3. HADOOP-262. Fix reduce tasks to report progress while they're + waiting for map outputs, so that they do not time out. + (Mahadev Konar via cutting) + + 4. HADOOP-245 and HADOOP-246. Improvements to record io package. + (Mahadev Konar via cutting) + + 5. HADOOP-276. Add logging config files to jar file so that they're + always found. (omalley via cutting) + + +Release 0.3.0 - 2006-06-02 + + 1. HADOOP-208. Enhance MapReduce web interface, adding new pages + for failed tasks, and tasktrackers. (omalley via cutting) + + 2. HADOOP-204. Tweaks to metrics package. (David Bowen via cutting) + + 3. HADOOP-209. Add a MapReduce-based file copier. This will + copy files within or between file systems in parallel. + (Milind Bhandarkar via cutting) + + 4. HADOOP-146. Fix DFS to check when randomly generating a new block + id that no existing blocks already have that id. + (Milind Bhandarkar via cutting) + + 5. HADOOP-180. Make a daemon thread that does the actual task clean ups, so + that the main offerService thread in the taskTracker doesn't get stuck + and miss his heartbeat window. This was killing many task trackers as + big jobs finished (300+ tasks / node). (omalley via cutting) + + 6. HADOOP-200. Avoid transmitting entire list of map task names to + reduce tasks. Instead just transmit the number of map tasks and + henceforth refer to them by number when collecting map output. + (omalley via cutting) + + 7. HADOOP-219. Fix a NullPointerException when handling a checksum + exception under SequenceFile.Sorter.sort(). (cutting & stack) + + 8. HADOOP-212. Permit alteration of the file block size in DFS. The + default block size for new files may now be specified in the + configuration with the dfs.block.size property. The block size + may also be specified when files are opened. + (omalley via cutting) + + 9. HADOOP-218. Avoid accessing configuration while looping through + tasks in JobTracker. (Mahadev Konar via cutting) + +10. HADOOP-161. Add hashCode() method to DFS's Block. + (Milind Bhandarkar via cutting) + +11. HADOOP-115. Map output types may now be specified. These are also + used as reduce input types, thus permitting reduce input types to + differ from reduce output types. (Runping Qi via cutting) + +12. HADOOP-216. Add task progress to task status page. + (Bryan Pendelton via cutting) + +13. HADOOP-233. Add web server to task tracker that shows running + tasks and logs. Also add log access to job tracker web interface. + (omalley via cutting) + +14. HADOOP-205. Incorporate pending tasks into tasktracker load + calculations. (Mahadev Konar via cutting) + +15. HADOOP-247. Fix sort progress to better handle exceptions. + (Mahadev Konar via cutting) + +16. HADOOP-195. Improve performance of the transfer of map outputs to + reduce nodes by performing multiple transfers in parallel, each on + a separate socket. (Sameer Paranjpye via cutting) + +17. HADOOP-251. Fix task processes to be tolerant of failed progress + reports to their parent process. (omalley via cutting) + +18. HADOOP-325. Improve the FileNotFound exceptions thrown by + LocalFileSystem to include the name of the file. + (Benjamin Reed via cutting) + +19. HADOOP-254. Use HTTP to transfer map output data to reduce + nodes. This, together with HADOOP-195, greatly improves the + performance of these transfers. (omalley via cutting) + +20. HADOOP-163. Cause datanodes that\ are unable to either read or + write data to exit, so that the namenode will no longer target + them for new blocks and will replicate their data on other nodes. + (Hairong Kuang via cutting) + +21. HADOOP-222. Add a -setrep option to the dfs commands that alters + file replication levels. (Johan Oskarson via cutting) + +22. HADOOP-75. In DFS, only check for a complete file when the file + is closed, rather than as each block is written. + (Milind Bhandarkar via cutting) + +23. HADOOP-124. Change DFS so that datanodes are identified by a + persistent ID rather than by host and port. This solves a number + of filesystem integrity problems, when, e.g., datanodes are + restarted. (Konstantin Shvachko via cutting) + +24. HADOOP-256. Add a C API for DFS. (Arun C Murthy via cutting) + +25. HADOOP-211. Switch to use the Jakarta Commons logging internally, + configured to use log4j by default. (Arun C Murthy and cutting) + +26. HADOOP-265. Tasktracker now fails to start if it does not have a + writable local directory for temporary files. In this case, it + logs a message to the JobTracker and exits. (Hairong Kuang via cutting) + +27. HADOOP-270. Fix potential deadlock in datanode shutdown. + (Hairong Kuang via cutting) + +Release 0.2.1 - 2006-05-12 + + 1. HADOOP-199. Fix reduce progress (broken by HADOOP-182). + (omalley via cutting) + + 2. HADOOP-201. Fix 'bin/hadoop dfs -report'. (cutting) + + 3. HADOOP-207. Fix JDK 1.4 incompatibility introduced by HADOOP-96. + System.getenv() does not work in JDK 1.4. (Hairong Kuang via cutting) + + +Release 0.2.0 - 2006-05-05 + + 1. Fix HADOOP-126. 'bin/hadoop dfs -cp' now correctly copies .crc + files. (Konstantin Shvachko via cutting) + + 2. Fix HADOOP-51. Change DFS to support per-file replication counts. + (Konstantin Shvachko via cutting) + + 3. Fix HADOOP-131. Add scripts to start/stop dfs and mapred daemons. + Use these in start/stop-all scripts. (Chris Mattmann via cutting) + + 4. Stop using ssh options by default that are not yet in widely used + versions of ssh. Folks can still enable their use by uncommenting + a line in conf/hadoop-env.sh. (cutting) + + 5. Fix HADOOP-92. Show information about all attempts to run each + task in the web ui. (Mahadev konar via cutting) + + 6. Fix HADOOP-128. Improved DFS error handling. (Owen O'Malley via cutting) + + 7. Fix HADOOP-129. Replace uses of java.io.File with new class named + Path. This fixes bugs where java.io.File methods were called + directly when FileSystem methods were desired, and reduces the + likelihood of such bugs in the future. It also makes the handling + of pathnames more consistent between local and dfs FileSystems and + between Windows and Unix. java.io.File-based methods are still + available for back-compatibility, but are deprecated and will be + removed once 0.2 is released. (cutting) + + 8. Change dfs.data.dir and mapred.local.dir to be comma-separated + lists of directories, no longer be space-separated. This fixes + several bugs on Windows. (cutting) + + 9. Fix HADOOP-144. Use mapred task id for dfs client id, to + facilitate debugging. (omalley via cutting) + +10. Fix HADOOP-143. Do not line-wrap stack-traces in web ui. + (omalley via cutting) + +11. Fix HADOOP-118. In DFS, improve clean up of abandoned file + creations. (omalley via cutting) + +12. Fix HADOOP-138. Stop multiple tasks in a single heartbeat, rather + than one per heartbeat. (Stefan via cutting) + +13. Fix HADOOP-139. Remove a potential deadlock in + LocalFileSystem.lock(). (Igor Bolotin via cutting) + +14. Fix HADOOP-134. Don't hang jobs when the tasktracker is + misconfigured to use an un-writable local directory. (omalley via cutting) + +15. Fix HADOOP-115. Correct an error message. (Stack via cutting) + +16. Fix HADOOP-133. Retry pings from child to parent, in case of + (local) communcation problems. Also log exit status, so that one + can distinguish patricide from other deaths. (omalley via cutting) + +17. Fix HADOOP-142. Avoid re-running a task on a host where it has + previously failed. (omalley via cutting) + +18. Fix HADOOP-148. Maintain a task failure count for each + tasktracker and display it in the web ui. (omalley via cutting) + +19. Fix HADOOP-151. Close a potential socket leak, where new IPC + connection pools were created per configuration instance that RPCs + use. Now a global RPC connection pool is used again, as + originally intended. (cutting) + +20. Fix HADOOP-69. Don't throw a NullPointerException when getting + hints for non-existing file split. (Bryan Pendelton via cutting) + +21. Fix HADOOP-157. When a task that writes dfs files (e.g., a reduce + task) failed and was retried, it would fail again and again, + eventually failing the job. The problem was that dfs did not yet + know that the failed task had abandoned the files, and would not + yet let another task create files with the same names. Dfs now + retries when creating a file long enough for locks on abandoned + files to expire. (omalley via cutting) + +22. Fix HADOOP-150. Improved task names that include job + names. (omalley via cutting) + +23. Fix HADOOP-162. Fix ConcurrentModificationException when + releasing file locks. (omalley via cutting) + +24. Fix HADOOP-132. Initial check-in of new Metrics API, including + implementations for writing metric data to a file and for sending + it to Ganglia. (David Bowen via cutting) + +25. Fix HADOOP-160. Remove some uneeded synchronization around + time-consuming operations in the TaskTracker. (omalley via cutting) + +26. Fix HADOOP-166. RPCs failed when passed subclasses of a declared + parameter type. This is fixed by changing ObjectWritable to store + both the declared type and the instance type for Writables. Note + that this incompatibly changes the format of ObjectWritable and + will render unreadable any ObjectWritables stored in files. + Nutch only uses ObjectWritable in intermediate files, so this + should not be a problem for Nutch. (Stefan & cutting) + +27. Fix HADOOP-168. MapReduce RPC protocol methods should all declare + IOException, so that timeouts are handled appropriately. + (omalley via cutting) + +28. Fix HADOOP-169. Don't fail a reduce task if a call to the + jobtracker to locate map outputs fails. (omalley via cutting) + +29. Fix HADOOP-170. Permit FileSystem clients to examine and modify + the replication count of individual files. Also fix a few + replication-related bugs. (Konstantin Shvachko via cutting) + +30. Permit specification of a higher replication levels for job + submission files (job.xml and job.jar). This helps with large + clusters, since these files are read by every node. (cutting) + +31. HADOOP-173. Optimize allocation of tasks with local data. (cutting) + +32. HADOOP-167. Reduce number of Configurations and JobConf's + created. (omalley via cutting) + +33. NUTCH-256. Change FileSystem#createNewFile() to create a .crc + file. The lack of a .crc file was causing warnings. (cutting) + +34. HADOOP-174. Change JobClient to not abort job until it has failed + to contact the job tracker for five attempts, not just one as + before. (omalley via cutting) + +35. HADOOP-177. Change MapReduce web interface to page through tasks. + Previously, when jobs had more than a few thousand tasks they + could crash web browsers. (Mahadev Konar via cutting) + +36. HADOOP-178. In DFS, piggyback blockwork requests from datanodes + on heartbeat responses from namenode. This reduces the volume of + RPC traffic. Also move startup delay in blockwork from datanode + to namenode. This fixes a problem where restarting the namenode + triggered a lot of uneeded replication. (Hairong Kuang via cutting) + +37. HADOOP-183. If the DFS namenode is restarted with different + minimum and/or maximum replication counts, existing files' + replication counts are now automatically adjusted to be within the + newly configured bounds. (Hairong Kuang via cutting) + +38. HADOOP-186. Better error handling in TaskTracker's top-level + loop. Also improve calculation of time to send next heartbeat. + (omalley via cutting) + +39. HADOOP-187. Add two MapReduce examples/benchmarks. One creates + files containing random data. The second sorts the output of the + first. (omalley via cutting) + +40. HADOOP-185. Fix so that, when a task tracker times out making the + RPC asking for a new task to run, the job tracker does not think + that it is actually running the task returned. (omalley via cutting) + +41. HADOOP-190. If a child process hangs after it has reported + completion, its output should not be lost. (Stack via cutting) + +42. HADOOP-184. Re-structure some test code to better support testing + on a cluster. (Mahadev Konar via cutting) + +43. HADOOP-191 Add streaming package, Hadoop's first contrib module. + This permits folks to easily submit MapReduce jobs whose map and + reduce functions are implemented by shell commands. Use + 'bin/hadoop jar build/hadoop-streaming.jar' to get details. + (Michel Tourn via cutting) + +44. HADOOP-189. Fix MapReduce in standalone configuration to + correctly handle job jar files that contain a lib directory with + nested jar files. (cutting) + +45. HADOOP-65. Initial version of record I/O framework that enables + the specification of record types and generates marshalling code + in both Java and C++. Generated Java code implements + WritableComparable, but is not yet otherwise used by + Hadoop. (Milind Bhandarkar via cutting) + +46. HADOOP-193. Add a MapReduce-based FileSystem benchmark. + (Konstantin Shvachko via cutting) + +47. HADOOP-194. Add a MapReduce-based FileSystem checker. This reads + every block in every file in the filesystem. (Konstantin Shvachko + via cutting) + +48. HADOOP-182. Fix so that lost task trackers to not change the + status of reduce tasks or completed jobs. Also fixes the progress + meter so that failed tasks are subtracted. (omalley via cutting) + +49. HADOOP-96. Logging improvements. Log files are now separate from + standard output and standard error files. Logs are now rolled. + Logging of all DFS state changes can be enabled, to facilitate + debugging. (Hairong Kuang via cutting) + + +Release 0.1.1 - 2006-04-08 + + 1. Added CHANGES.txt, logging all significant changes to Hadoop. (cutting) + + 2. Fix MapReduceBase.close() to throw IOException, as declared in the + Closeable interface. This permits subclasses which override this + method to throw that exception. (cutting) + + 3. Fix HADOOP-117. Pathnames were mistakenly transposed in + JobConf.getLocalFile() causing many mapred temporary files to not + be removed. (Raghavendra Prabhu via cutting) + + 4. Fix HADOOP-116. Clean up job submission files when jobs complete. + (cutting) + + 5. Fix HADOOP-125. Fix handling of absolute paths on Windows (cutting) + +Release 0.1.0 - 2006-04-01 + + 1. The first release of Hadoop. + diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100644 index 0000000000..59bcdbc978 --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,244 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. 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The country in +which you currently reside may have restrictions on the import, +possession, use, and/or re-export to another country, of +encryption software. BEFORE using any encryption software, please +check your country's laws, regulations and policies concerning the +import, possession, or use, and re-export of encryption software, to +see if this is permitted. See for more +information. + +The U.S. Government Department of Commerce, Bureau of Industry and +Security (BIS), has classified this software as Export Commodity +Control Number (ECCN) 5D002.C.1, which includes information security +software using or performing cryptographic functions with asymmetric +algorithms. The form and manner of this Apache Software Foundation +distribution makes it eligible for export under the License Exception +ENC Technology Software Unrestricted (TSU) exception (see the BIS +Export Administration Regulations, Section 740.13) for both object +code and source code. + +The following provides more details on the included cryptographic +software: + Hadoop Core uses the SSL libraries from the Jetty project written +by mortbay.org. diff --git a/bin/hadoop b/bin/hadoop new file mode 100755 index 0000000000..1a439c08b7 --- /dev/null +++ b/bin/hadoop @@ -0,0 +1,108 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# This script runs the hadoop core commands. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hadoop-config.sh + +function print_usage(){ + echo "Usage: hadoop [--config confdir] COMMAND" + echo " where COMMAND is one of:" + echo " fs run a generic filesystem user client" + echo " version print the version" + echo " jar run a jar file" + echo " distcp copy file or directories recursively" + echo " archive -archiveName NAME * create a hadoop archive" + echo " daemonlog get/set the log level for each daemon" + echo " or" + echo " CLASSNAME run the class named CLASSNAME" + echo "" + echo "Most commands print help when invoked w/o parameters." +} + +if [ $# = 0 ]; then + print_usage + exit +fi + +COMMAND=$1 +case $COMMAND in + #hdfs commands + namenode|secondarynamenode|datanode|dfs|dfsadmin|fsck|balancer) + echo "DEPRECATED: Use of this script to execute hdfs command is deprecated." + echo "Instead use the hdfs command for it." + echo "" + #try to locate hdfs and if present, delegate to it. + if [ -f "${HADOOP_HDFS_HOME}"/bin/hdfs ]; then + exec "${HADOOP_HDFS_HOME}"/bin/hdfs $* + else + echo "HDFS not found." + exit + fi + ;; + + #mapred commands + mradmin|jobtracker|tasktracker|pipes|job|queue) + echo "DEPRECATED: Use of this script to execute mapred command is deprecated." + echo "Instead use the mapred command for it." + echo "" + #try to locate mapred and if present, delegate to it. + if [ -f "${HADOOP_MAPRED_HOME}"/bin/mapred ]; then + exec "${HADOOP_MAPRED_HOME}"/bin/mapred $* + else + echo "MAPRED not found." + exit + fi + ;; + + #core commands + *) + # the core commands + if [ "$COMMAND" = "fs" ] ; then + CLASS=org.apache.hadoop.fs.FsShell + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" + elif [ "$COMMAND" = "version" ] ; then + CLASS=org.apache.hadoop.util.VersionInfo + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" + elif [ "$COMMAND" = "jar" ] ; then + CLASS=org.apache.hadoop.util.RunJar + elif [ "$COMMAND" = "distcp" ] ; then + CLASS=org.apache.hadoop.tools.DistCp + CLASSPATH=${CLASSPATH}:${TOOL_PATH} + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" + elif [ "$COMMAND" = "daemonlog" ] ; then + CLASS=org.apache.hadoop.log.LogLevel + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" + elif [ "$COMMAND" = "archive" ] ; then + CLASS=org.apache.hadoop.tools.HadoopArchives + CLASSPATH=${CLASSPATH}:${TOOL_PATH} + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" + else + CLASS=$COMMAND + fi + shift + + if $cygwin; then + CLASSPATH=`cygpath -p -w "$CLASSPATH"` + fi + exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@" + ;; + +esac diff --git a/bin/hadoop-config.sh b/bin/hadoop-config.sh new file mode 100644 index 0000000000..74f7d3cd5b --- /dev/null +++ b/bin/hadoop-config.sh @@ -0,0 +1,248 @@ +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# included in all the hadoop scripts with source command +# should not be executable directly +# also should not be passed any arguments, since we need original $* + +# resolve links - $0 may be a softlink + +this="$0" +while [ -h "$this" ]; do + ls=`ls -ld "$this"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '.*/.*' > /dev/null; then + this="$link" + else + this=`dirname "$this"`/"$link" + fi +done + +# convert relative path to absolute path +bin=`dirname "$this"` +script=`basename "$this"` +bin=`cd "$bin"; pwd` +this="$bin/$script" + +# the root of the Hadoop installation +#TODO: change the env variable when dir structure is changed +export HADOOP_HOME=`dirname "$this"`/.. +export HADOOP_CORE_HOME="${HADOOP_HOME}" +#export HADOOP_HOME=`dirname "$this"`/../.. +#export HADOOP_CORE_HOME="${HADOOP_CORE_HOME:-`dirname "$this"`/..}" + +#check to see if the conf dir is given as an optional argument +if [ $# -gt 1 ] +then + if [ "--config" = "$1" ] + then + shift + confdir=$1 + shift + HADOOP_CONF_DIR=$confdir + fi +fi + +# Allow alternate conf dir location. +export HADOOP_CONF_DIR="${HADOOP_CONF_DIR:-$HADOOP_HOME/conf}" + +#check to see it is specified whether to use the slaves or the +# masters file +if [ $# -gt 1 ] +then + if [ "--hosts" = "$1" ] + then + shift + slavesfile=$1 + shift + export HADOOP_SLAVES="${HADOOP_CONF_DIR}/$slavesfile" + fi +fi + +cygwin=false +case "`uname`" in +CYGWIN*) cygwin=true;; +esac + +if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then + . "${HADOOP_CONF_DIR}/hadoop-env.sh" +fi + +# some Java parameters +if [ "$JAVA_HOME" != "" ]; then + #echo "run java in $JAVA_HOME" + JAVA_HOME=$JAVA_HOME +fi + +if [ "$JAVA_HOME" = "" ]; then + echo "Error: JAVA_HOME is not set." + exit 1 +fi + +JAVA=$JAVA_HOME/bin/java +JAVA_HEAP_MAX=-Xmx1000m + +# check envvars which might override default args +if [ "$HADOOP_HEAPSIZE" != "" ]; then + #echo "run with heapsize $HADOOP_HEAPSIZE" + JAVA_HEAP_MAX="-Xmx""$HADOOP_HEAPSIZE""m" + #echo $JAVA_HEAP_MAX +fi + +# CLASSPATH initially contains $HADOOP_CONF_DIR +CLASSPATH="${HADOOP_CONF_DIR}" +CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar + +# for developers, add Hadoop classes to CLASSPATH +if [ -d "$HADOOP_CORE_HOME/build/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_CORE_HOME/build/classes +fi +if [ -d "$HADOOP_CORE_HOME/build/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_CORE_HOME/build +fi +if [ -d "$HADOOP_CORE_HOME/build/test/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_CORE_HOME/build/test/classes +fi +if [ -d "$HADOOP_CORE_HOME/build/tools" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_CORE_HOME/build/tools +fi + +# so that filenames w/ spaces are handled correctly in loops below +IFS= + +# for releases, add core hadoop jar & webapps to CLASSPATH +if [ -d "$HADOOP_CORE_HOME/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_CORE_HOME +fi +for f in $HADOOP_CORE_HOME/hadoop-*-core.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +# add libs to CLASSPATH +for f in $HADOOP_CORE_HOME/lib/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +if [ -d "$HADOOP_CORE_HOME/build/ivy/lib/Hadoop/common" ]; then +for f in $HADOOP_CORE_HOME/build/ivy/lib/Hadoop/common/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done +fi + +for f in $HADOOP_CORE_HOME/lib/jsp-2.1/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +for f in $HADOOP_CORE_HOME/hadoop-*-tools.jar; do + TOOL_PATH=${TOOL_PATH}:$f; +done +for f in $HADOOP_CORE_HOME/build/hadoop-*-tools.jar; do + TOOL_PATH=${TOOL_PATH}:$f; +done + +# add user-specified CLASSPATH last +if [ "$HADOOP_CLASSPATH" != "" ]; then + CLASSPATH=${CLASSPATH}:${HADOOP_CLASSPATH} +fi + +# default log directory & file +if [ "$HADOOP_LOG_DIR" = "" ]; then + HADOOP_LOG_DIR="$HADOOP_HOME/logs" +fi +if [ "$HADOOP_LOGFILE" = "" ]; then + HADOOP_LOGFILE='hadoop.log' +fi + +# default policy file for service-level authorization +if [ "$HADOOP_POLICYFILE" = "" ]; then + HADOOP_POLICYFILE="hadoop-policy.xml" +fi + +# restore ordinary behaviour +unset IFS + +# cygwin path translation +if $cygwin; then + HADOOP_CORE_HOME=`cygpath -w "$HADOOP_CORE_HOME"` + HADOOP_LOG_DIR=`cygpath -w "$HADOOP_LOG_DIR"` + TOOL_PATH=`cygpath -p -w "$TOOL_PATH"` +fi +# setup 'java.library.path' for native-hadoop code if necessary +JAVA_LIBRARY_PATH='' +if [ -d "${HADOOP_CORE_HOME}/build/native" -o -d "${HADOOP_CORE_HOME}/lib/native" ]; then + JAVA_PLATFORM=`CLASSPATH=${CLASSPATH} ${JAVA} -Xmx32m org.apache.hadoop.util.PlatformName | sed -e "s/ /_/g"` + + if [ -d "$HADOOP_CORE_HOME/build/native" ]; then + JAVA_LIBRARY_PATH=${HADOOP_CORE_HOME}/build/native/${JAVA_PLATFORM}/lib + fi + + if [ -d "${HADOOP_CORE_HOME}/lib/native" ]; then + if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then + JAVA_LIBRARY_PATH=${JAVA_LIBRARY_PATH}:${HADOOP_CORE_HOME}/lib/native/${JAVA_PLATFORM} + else + JAVA_LIBRARY_PATH=${HADOOP_CORE_HOME}/lib/native/${JAVA_PLATFORM} + fi + fi +fi + +# cygwin path translation +if $cygwin; then + JAVA_LIBRARY_PATH=`cygpath -p "$JAVA_LIBRARY_PATH"` +fi + +HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.dir=$HADOOP_LOG_DIR" +HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.log.file=$HADOOP_LOGFILE" +HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.home.dir=$HADOOP_CORE_HOME" +HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.id.str=$HADOOP_IDENT_STRING" +HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.root.logger=${HADOOP_ROOT_LOGGER:-INFO,console}" +if [ "x$JAVA_LIBRARY_PATH" != "x" ]; then + HADOOP_OPTS="$HADOOP_OPTS -Djava.library.path=$JAVA_LIBRARY_PATH" +fi +HADOOP_OPTS="$HADOOP_OPTS -Dhadoop.policy.file=$HADOOP_POLICYFILE" + +# put hdfs in classpath if present +if [ "$HADOOP_HDFS_HOME" = "" ]; then + if [ -d "${HADOOP_HOME}/hdfs" ]; then + HADOOP_HDFS_HOME=$HADOOP_HOME/hdfs + echo Found HDFS installed at $HADOOP_HDFS_HOME + fi +fi + +if [ -d "${HADOOP_HDFS_HOME}" ]; then + for f in $HADOOP_HDFS_HOME/hadoop-*-hdfs.jar; do + CLASSPATH=${CLASSPATH}:$f; + done + + # add libs to CLASSPATH + for f in $HADOOP_HDFS_HOME/lib/*.jar; do + CLASSPATH=${CLASSPATH}:$f; + done + + if [ -d "$HADOOP_HDFS_HOME/build/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/classes + fi +fi + +# set mapred home if mapred is present +if [ "$HADOOP_MAPRED_HOME" = "" ]; then + if [ -d "${HADOOP_HOME}/mapred" ]; then + HADOOP_MAPRED_HOME=$HADOOP_HOME/mapred + echo Found MAPRED installed at $HADOOP_MAPRED_HOME + fi +fi + +# TODO:remove this when dir structure is changed +export HADOOP_HDFS_HOME=$HADOOP_HOME +export HADOOP_MAPRED_HOME=$HADOOP_HOME diff --git a/bin/hadoop-daemon.sh b/bin/hadoop-daemon.sh new file mode 100755 index 0000000000..a6d8d6a4b2 --- /dev/null +++ b/bin/hadoop-daemon.sh @@ -0,0 +1,152 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Runs a Hadoop command as a daemon. +# +# Environment Variables +# +# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf. +# HADOOP_LOG_DIR Where log files are stored. PWD by default. +# HADOOP_MASTER host:path where hadoop code should be rsync'd from +# HADOOP_PID_DIR The pid files are stored. /tmp by default. +# HADOOP_IDENT_STRING A string representing this instance of hadoop. $USER by default +# HADOOP_NICENESS The scheduling priority for daemons. Defaults to 0. +## + +usage="Usage: hadoop-daemon.sh [--config ] [--hosts hostlistfile] [--script script] (start|stop) " + +# if no args specified, show usage +if [ $# -le 1 ]; then + echo $usage + exit 1 +fi + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hadoop-config.sh + +# get arguments + +#default value +hadoopScript="$HADOOP_HOME"/bin/hadoop +if [ "--script" = "$1" ] + then + shift + hadoopScript=$1 + shift +fi +startStop=$1 +shift +command=$1 +shift + +hadoop_rotate_log () +{ + log=$1; + num=5; + if [ -n "$2" ]; then + num=$2 + fi + if [ -f "$log" ]; then # rotate logs + while [ $num -gt 1 ]; do + prev=`expr $num - 1` + [ -f "$log.$prev" ] && mv "$log.$prev" "$log.$num" + num=$prev + done + mv "$log" "$log.$num"; + fi +} + +if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then + . "${HADOOP_CONF_DIR}/hadoop-env.sh" +fi + +# get log directory +if [ "$HADOOP_LOG_DIR" = "" ]; then + export HADOOP_LOG_DIR="$HADOOP_HOME/logs" +fi +mkdir -p "$HADOOP_LOG_DIR" + +if [ "$HADOOP_PID_DIR" = "" ]; then + HADOOP_PID_DIR=/tmp +fi + +if [ "$HADOOP_IDENT_STRING" = "" ]; then + export HADOOP_IDENT_STRING="$USER" +fi + +# some variables +export HADOOP_LOGFILE=hadoop-$HADOOP_IDENT_STRING-$command-$HOSTNAME.log +export HADOOP_ROOT_LOGGER="INFO,DRFA" +log=$HADOOP_LOG_DIR/hadoop-$HADOOP_IDENT_STRING-$command-$HOSTNAME.out +pid=$HADOOP_PID_DIR/hadoop-$HADOOP_IDENT_STRING-$command.pid + +# Set default scheduling priority +if [ "$HADOOP_NICENESS" = "" ]; then + export HADOOP_NICENESS=0 +fi + +case $startStop in + + (start) + + mkdir -p "$HADOOP_PID_DIR" + + if [ -f $pid ]; then + if kill -0 `cat $pid` > /dev/null 2>&1; then + echo $command running as process `cat $pid`. Stop it first. + exit 1 + fi + fi + + if [ "$HADOOP_MASTER" != "" ]; then + echo rsync from $HADOOP_MASTER + rsync -a -e ssh --delete --exclude=.svn --exclude='logs/*' --exclude='contrib/hod/logs/*' $HADOOP_MASTER/ "$HADOOP_HOME" + fi + + hadoop_rotate_log $log + echo starting $command, logging to $log + cd "$HADOOP_HOME" + nohup nice -n $HADOOP_NICENESS $hadoopScript --config $HADOOP_CONF_DIR $command "$@" > "$log" 2>&1 < /dev/null & + echo $! > $pid + sleep 1; head "$log" + ;; + + (stop) + + if [ -f $pid ]; then + if kill -0 `cat $pid` > /dev/null 2>&1; then + echo stopping $command + kill `cat $pid` + else + echo no $command to stop + fi + else + echo no $command to stop + fi + ;; + + (*) + echo $usage + exit 1 + ;; + +esac + + diff --git a/bin/hadoop-daemons.sh b/bin/hadoop-daemons.sh new file mode 100755 index 0000000000..894d8ab11a --- /dev/null +++ b/bin/hadoop-daemons.sh @@ -0,0 +1,34 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Run a Hadoop command on all slave hosts. + +usage="Usage: hadoop-daemons.sh [--config confdir] [--hosts hostlistfile] [start|stop] command args..." + +# if no args specified, show usage +if [ $# -le 1 ]; then + echo $usage + exit 1 +fi + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. $bin/hadoop-config.sh + +exec "$bin/slaves.sh" --config $HADOOP_CONF_DIR cd "$HADOOP_HOME" \; "$bin/hadoop-daemon.sh" --config $HADOOP_CONF_DIR "$@" diff --git a/bin/hdfs b/bin/hdfs new file mode 100755 index 0000000000..94b2754bc1 --- /dev/null +++ b/bin/hdfs @@ -0,0 +1,110 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hdfs-config.sh + +function print_usage(){ + echo "Usage: hdfs [--config confdir] COMMAND" + echo " where COMMAND is one of:" + echo " namenode -format format the DFS filesystem" + echo " secondarynamenode run the DFS secondary namenode" + echo " namenode run the DFS namenode" + echo " datanode run a DFS datanode" + echo " dfsadmin run a DFS admin client" + echo " fsck run a DFS filesystem checking utility" + echo " balancer run a cluster balancing utility" + echo " jmxget get JMX exported values from NameNode or DataNode." + echo " oiv apply the offline fsimage viewer to an fsimage" + echo " Use -help to see options" + echo "" + echo "Most commands print help when invoked w/o parameters." +} + +if [ $# = 0 ]; then + print_usage + exit +fi + +COMMAND=$1 +shift + +if [ "$COMMAND" = "namenode" ] ; then + CLASS='org.apache.hadoop.hdfs.server.namenode.NameNode' + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_NAMENODE_OPTS" +elif [ "$COMMAND" = "secondarynamenode" ] ; then + CLASS='org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode' + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_SECONDARYNAMENODE_OPTS" +elif [ "$COMMAND" = "datanode" ] ; then + CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode' + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_DATANODE_OPTS" +elif [ "$COMMAND" = "dfs" ] ; then + CLASS=org.apache.hadoop.fs.FsShell + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" +elif [ "$COMMAND" = "dfsadmin" ] ; then + CLASS=org.apache.hadoop.hdfs.tools.DFSAdmin + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" +elif [ "$COMMAND" = "fsck" ] ; then + CLASS=org.apache.hadoop.hdfs.tools.DFSck + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" +elif [ "$COMMAND" = "balancer" ] ; then + CLASS=org.apache.hadoop.hdfs.server.balancer.Balancer + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_BALANCER_OPTS" +elif [ "$COMMAND" = "jmxget" ] ; then + CLASS=org.apache.hadoop.hdfs.tools.JMXGet +elif [ "$COMMAND" = "oiv" ] ; then + CLASS=org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer +else + echo $COMMAND - invalid command + print_usage + exit +fi + +# for developers, add hdfs classes to CLASSPATH +if [ -d "$HADOOP_HDFS_HOME/build/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/classes +fi +if [ -d "$HADOOP_HDFS_HOME/build/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build +fi +if [ -d "$HADOOP_HDFS_HOME/build/test/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/test/classes +fi +if [ -d "$HADOOP_HDFS_HOME/build/tools" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/tools +fi + +# for releases, add core hdfs jar & webapps to CLASSPATH +if [ -d "$HADOOP_HDFS_HOME/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME +fi +for f in $HADOOP_HDFS_HOME/hadoop-*-hdfs.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +# add libs to CLASSPATH +for f in $HADOOP_HDFS_HOME/lib/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +if $cygwin; then + CLASSPATH=`cygpath -p -w "$CLASSPATH"` +fi + +exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@" diff --git a/bin/hdfs-config.sh b/bin/hdfs-config.sh new file mode 100644 index 0000000000..9f7ad736e9 --- /dev/null +++ b/bin/hdfs-config.sh @@ -0,0 +1,33 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# included in all the hdfs scripts with source command +# should not be executed directly + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +#TODO: change the env variable when directory structure is changed +export HADOOP_CORE_HOME="${HADOOP_CORE_HOME:-$bin/..}" +#export HADOOP_CORE_HOME="${HADOOP_CORE_HOME:-$bin/../../core}" + +if [ -d "${HADOOP_CORE_HOME}" ]; then + . "$HADOOP_CORE_HOME"/bin/hadoop-config.sh +else + echo "Hadoop core not found." + exit +fi diff --git a/bin/mapred b/bin/mapred new file mode 100755 index 0000000000..b345274027 --- /dev/null +++ b/bin/mapred @@ -0,0 +1,100 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. $bin/mapred-config.sh + +function print_usage(){ + echo "Usage: mapred [--config confdir] COMMAND" + echo " where COMMAND is one of:" + echo " mradmin run a Map-Reduce admin client" + echo " jobtracker run the MapReduce job Tracker node" + echo " tasktracker run a MapReduce task Tracker node" + echo " pipes run a Pipes job" + echo " job manipulate MapReduce jobs" + echo " queue get information regarding JobQueues" + echo "" + echo "Most commands print help when invoked w/o parameters." +} + +if [ $# = 0 ]; then + print_usage + exit +fi + +COMMAND=$1 +shift + +if [ "$COMMAND" = "mradmin" ] ; then + CLASS=org.apache.hadoop.mapred.tools.MRAdmin + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" +elif [ "$COMMAND" = "jobtracker" ] ; then + CLASS=org.apache.hadoop.mapred.JobTracker + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_JOBTRACKER_OPTS" +elif [ "$COMMAND" = "tasktracker" ] ; then + CLASS=org.apache.hadoop.mapred.TaskTracker + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_TASKTRACKER_OPTS" +elif [ "$COMMAND" = "job" ] ; then + CLASS=org.apache.hadoop.mapred.JobClient +elif [ "$COMMAND" = "queue" ] ; then + CLASS=org.apache.hadoop.mapred.JobQueueClient +elif [ "$COMMAND" = "pipes" ] ; then + CLASS=org.apache.hadoop.mapred.pipes.Submitter + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" +elif [ "$COMMAND" = "sampler" ] ; then + CLASS=org.apache.hadoop.mapred.lib.InputSampler + HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS" +else + echo $COMMAND - invalid command + print_usage + exit +fi + +# for developers, add mapred classes to CLASSPATH +if [ -d "$HADOOP_MAPRED_HOME/build/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build/classes +fi +if [ -d "$HADOOP_MAPRED_HOME/build/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build +fi +if [ -d "$HADOOP_MAPRED_HOME/build/test/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build/test/classes +fi +if [ -d "$HADOOP_MAPRED_HOME/build/tools" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME/build/tools +fi + +# for releases, add core mapred jar & webapps to CLASSPATH +if [ -d "$HADOOP_MAPRED_HOME/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_MAPRED_HOME +fi +for f in $HADOOP_MAPRED_HOME/hadoop-*-mapred.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +# add libs to CLASSPATH +for f in $HADOOP_MAPRED_HOME/lib/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +if $cygwin; then + CLASSPATH=`cygpath -p -w "$CLASSPATH"` +fi +export CLASSPATH +exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS $CLASS "$@" diff --git a/bin/mapred-config.sh b/bin/mapred-config.sh new file mode 100644 index 0000000000..af35dabab3 --- /dev/null +++ b/bin/mapred-config.sh @@ -0,0 +1,33 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# included in all the mapred scripts with source command +# should not be executed directly + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +#TODO: change the env variable when directory structure is changed +export HADOOP_CORE_HOME="${HADOOP_CORE_HOME:-$bin/..}" +#export HADOOP_CORE_HOME="${HADOOP_CORE_HOME:-$bin/../../core}" + +if [ -d "${HADOOP_CORE_HOME}" ]; then + . "$HADOOP_CORE_HOME"/bin/hadoop-config.sh +else + echo "Hadoop core not found." + exit +fi diff --git a/bin/rcc b/bin/rcc new file mode 100755 index 0000000000..a39745be6f --- /dev/null +++ b/bin/rcc @@ -0,0 +1,99 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# The Hadoop record compiler +# +# Environment Variables +# +# JAVA_HOME The java implementation to use. Overrides JAVA_HOME. +# +# HADOOP_OPTS Extra Java runtime options. +# +# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf. +# + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hadoop-config.sh + +if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then + . "${HADOOP_CONF_DIR}/hadoop-env.sh" +fi + +# some Java parameters +if [ "$JAVA_HOME" != "" ]; then + #echo "run java in $JAVA_HOME" + JAVA_HOME=$JAVA_HOME +fi + +if [ "$JAVA_HOME" = "" ]; then + echo "Error: JAVA_HOME is not set." + exit 1 +fi + +JAVA=$JAVA_HOME/bin/java +JAVA_HEAP_MAX=-Xmx1000m + +# CLASSPATH initially contains $HADOOP_CONF_DIR +CLASSPATH="${HADOOP_CONF_DIR}" +CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar + +# for developers, add Hadoop classes to CLASSPATH +if [ -d "$HADOOP_HOME/build/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/classes +fi +if [ -d "$HADOOP_HOME/build/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build +fi +if [ -d "$HADOOP_HOME/build/test/classes" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HOME/build/test/classes +fi + +# so that filenames w/ spaces are handled correctly in loops below +IFS= + +# for releases, add core hadoop jar & webapps to CLASSPATH +if [ -d "$HADOOP_HOME/webapps" ]; then + CLASSPATH=${CLASSPATH}:$HADOOP_HOME +fi +for f in $HADOOP_HOME/hadoop-*-core.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +# add libs to CLASSPATH +for f in $HADOOP_HOME/lib/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +for f in $HADOOP_HOME/lib/jetty-ext/*.jar; do + CLASSPATH=${CLASSPATH}:$f; +done + +# restore ordinary behaviour +unset IFS + +CLASS='org.apache.hadoop.record.compiler.generated.Rcc' + +# cygwin path translation +if expr `uname` : 'CYGWIN*' > /dev/null; then + CLASSPATH=`cygpath -p -w "$CLASSPATH"` +fi + +# run it +exec "$JAVA" $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@" diff --git a/bin/slaves.sh b/bin/slaves.sh new file mode 100755 index 0000000000..fc9f720be7 --- /dev/null +++ b/bin/slaves.sh @@ -0,0 +1,68 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Run a shell command on all slave hosts. +# +# Environment Variables +# +# HADOOP_SLAVES File naming remote hosts. +# Default is ${HADOOP_CONF_DIR}/slaves. +# HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf. +# HADOOP_SLAVE_SLEEP Seconds to sleep between spawning remote commands. +# HADOOP_SSH_OPTS Options passed to ssh when running remote commands. +## + +usage="Usage: slaves.sh [--config confdir] command..." + +# if no args specified, show usage +if [ $# -le 0 ]; then + echo $usage + exit 1 +fi + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hadoop-config.sh + +# If the slaves file is specified in the command line, +# then it takes precedence over the definition in +# hadoop-env.sh. Save it here. +HOSTLIST=$HADOOP_SLAVES + +if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then + . "${HADOOP_CONF_DIR}/hadoop-env.sh" +fi + +if [ "$HOSTLIST" = "" ]; then + if [ "$HADOOP_SLAVES" = "" ]; then + export HOSTLIST="${HADOOP_CONF_DIR}/slaves" + else + export HOSTLIST="${HADOOP_SLAVES}" + fi +fi + +for slave in `cat "$HOSTLIST"|sed "s/#.*$//;/^$/d"`; do + ssh $HADOOP_SSH_OPTS $slave $"${@// /\\ }" \ + 2>&1 | sed "s/^/$slave: /" & + if [ "$HADOOP_SLAVE_SLEEP" != "" ]; then + sleep $HADOOP_SLAVE_SLEEP + fi +done + +wait diff --git a/bin/start-all.sh b/bin/start-all.sh new file mode 100755 index 0000000000..1c7dd87dea --- /dev/null +++ b/bin/start-all.sh @@ -0,0 +1,36 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Start all hadoop daemons. Run this on master node. + +echo "This script is Deprecated. Instead use start-dfs.sh and start-mapred.sh" + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hadoop-config.sh + +# start hdfs daemons if hdfs is present +if [ -f "${HADOOP_HDFS_HOME}"/bin/start-dfs.sh ]; then + "${HADOOP_HDFS_HOME}"/bin/start-dfs.sh --config $HADOOP_CONF_DIR +fi + +# start mapred daemons if mapred is present +if [ -f "${HADOOP_MAPRED_HOME}"/bin/start-mapred.sh ]; then + "${HADOOP_MAPRED_HOME}"/bin/start-mapred.sh --config $HADOOP_CONF_DIR +fi diff --git a/bin/start-balancer.sh b/bin/start-balancer.sh new file mode 100755 index 0000000000..8594be7722 --- /dev/null +++ b/bin/start-balancer.sh @@ -0,0 +1,25 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hdfs-config.sh + +# Start balancer daemon. + +"$HADOOP_CORE_HOME"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs start balancer $@ diff --git a/bin/start-dfs.sh b/bin/start-dfs.sh new file mode 100755 index 0000000000..3ffcf4b961 --- /dev/null +++ b/bin/start-dfs.sh @@ -0,0 +1,52 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Start hadoop dfs daemons. +# Optinally upgrade or rollback dfs state. +# Run this on master node. + +usage="Usage: start-dfs.sh [-upgrade|-rollback]" + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hdfs-config.sh + +# get arguments +if [ $# -ge 1 ]; then + nameStartOpt=$1 + shift + case $nameStartOpt in + (-upgrade) + ;; + (-rollback) + dataStartOpt=$nameStartOpt + ;; + (*) + echo $usage + exit 1 + ;; + esac +fi + +# start dfs daemons +# start namenode after datanodes, to minimize time namenode is up w/o data +# note: datanodes will log connection errors until namenode starts +"$HADOOP_CORE_HOME"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs start namenode $nameStartOpt +"$HADOOP_CORE_HOME"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs start datanode $dataStartOpt +"$HADOOP_CORE_HOME"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts masters --script "$bin"/hdfs start secondarynamenode diff --git a/bin/start-mapred.sh b/bin/start-mapred.sh new file mode 100755 index 0000000000..4eccd3b110 --- /dev/null +++ b/bin/start-mapred.sh @@ -0,0 +1,29 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Start hadoop map reduce daemons. Run this on master node. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. $bin/mapred-config.sh + +# start mapred daemons +# start jobtracker first to minimize connection errors at startup +"$HADOOP_CORE_HOME"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/mapred start jobtracker +"$HADOOP_CORE_HOME"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/mapred start tasktracker \ No newline at end of file diff --git a/bin/stop-all.sh b/bin/stop-all.sh new file mode 100755 index 0000000000..ab0cd8f62a --- /dev/null +++ b/bin/stop-all.sh @@ -0,0 +1,37 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Stop all hadoop daemons. Run this on master node. + +echo "This script is Deprecated. Instead use stop-dfs.sh and stop-mapred.sh" + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hadoop-config.sh + +# stop hdfs daemons if hdfs is present +if [ -f "${HADOOP_HDFS_HOME}"/bin/stop-dfs.sh ]; then + "${HADOOP_HDFS_HOME}"/bin/stop-dfs.sh --config $HADOOP_CONF_DIR +fi + +# stop mapred daemons if mapred is present +if [ -f "${HADOOP_MAPRED_HOME}"/bin/stop-mapred.sh ]; then + "${HADOOP_MAPRED_HOME}"/bin/stop-mapred.sh --config $HADOOP_CONF_DIR +fi + diff --git a/bin/stop-balancer.sh b/bin/stop-balancer.sh new file mode 100755 index 0000000000..f53649b670 --- /dev/null +++ b/bin/stop-balancer.sh @@ -0,0 +1,26 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hdfs-config.sh + +# Stop balancer daemon. +# Run this on the machine where the balancer is running + +"$HADOOP_CORE_HOME"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs stop balancer diff --git a/bin/stop-dfs.sh b/bin/stop-dfs.sh new file mode 100755 index 0000000000..5d3fe54db9 --- /dev/null +++ b/bin/stop-dfs.sh @@ -0,0 +1,28 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Stop hadoop DFS daemons. Run this on master node. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. "$bin"/hdfs-config.sh + +"$HADOOP_CORE_HOME"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs stop namenode +"$HADOOP_CORE_HOME"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs stop datanode +"$HADOOP_CORE_HOME"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --hosts masters --script "$bin"/hdfs stop secondarynamenode \ No newline at end of file diff --git a/bin/stop-mapred.sh b/bin/stop-mapred.sh new file mode 100755 index 0000000000..1a65a3eaa8 --- /dev/null +++ b/bin/stop-mapred.sh @@ -0,0 +1,27 @@ +#!/usr/bin/env bash + +# Licensed to the Apache Software Foundation (ASF) under one or more +# contributor license agreements. See the NOTICE file distributed with +# this work for additional information regarding copyright ownership. +# The ASF licenses this file to You under the Apache License, Version 2.0 +# (the "License"); you may not use this file except in compliance with +# the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Stop hadoop map reduce daemons. Run this on master node. + +bin=`dirname "$0"` +bin=`cd "$bin"; pwd` + +. $bin/mapred-config.sh + +"$HADOOP_CORE_HOME"/bin/hadoop-daemon.sh --config $HADOOP_CONF_DIR --script "$bin"/mapred stop jobtracker +"$HADOOP_CORE_HOME"/bin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/mapred stop tasktracker \ No newline at end of file diff --git a/build.xml b/build.xml new file mode 100644 index 0000000000..e5c2641019 --- /dev/null +++ b/build.xml @@ -0,0 +1,2165 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
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