Go to file
Steve Loughran 7f9ca101e2
HADOOP-18517. ABFS: Add fs.azure.enable.readahead option to disable readahead (#5103)
* HADOOP-18517. ABFS: Add fs.azure.enable.readahead option to disable readahead

Adds new config option to turn off readahead
* also allows it to be passed in through openFile(),
* extends ITestAbfsReadWriteAndSeek to use the option, including one
  replicated test...that shows that turning it off is slower.

Important: this does not address the critical data corruption issue
HADOOP-18521. ABFS ReadBufferManager buffer sharing across concurrent HTTP requests

What is does do is provide a way to completely bypass the ReadBufferManager.
To mitigate the problem, either fs.azure.enable.readahead needs to be set to false,
or set "fs.azure.readaheadqueue.depth" to 0 -this still goes near the (broken)
ReadBufferManager code, but does't trigger the bug.

For safe reading of files through the ABFS connector, readahead MUST be disabled
or the followup fix to HADOOP-18521 applied

Contributed by Steve Loughran
2022-11-08 11:43:04 +00:00
.github HADOOP-17799. Improve the GitHub pull request template (#3277) 2021-08-14 21:16:15 +09:00
.yetus Add .yetus/excludes.txt (#4984) 2022-10-11 09:23:34 -07:00
dev-support Add Dockerfile_windows_10 (#4936) 2022-10-12 09:30:54 -07:00
hadoop-assemblies HDFS-15346. FedBalance tool implementation. Contributed by Jinglun. 2020-06-18 13:33:25 +08:00
hadoop-build-tools HADOOP-17968 Migrate checkstyle module illegalimport to maven enforcer banned-illegal-imports (#3584) 2021-10-28 15:57:15 +09:00
hadoop-client-modules HADOOP-18441. Remove hadoop custom ServicesResourceTransformer (#4850). Contributed by PJ Fanning. 2022-09-07 17:11:12 +05:30
hadoop-cloud-storage-project HADOOP-18442. Remove openstack support (#4855) 2022-10-06 11:49:38 +01:00
hadoop-common-project HADOOP-18507. VectorIO FileRange type to support a "reference" field (#5076) 2022-10-31 21:12:13 +00:00
hadoop-dist MAPREDUCE-7386. Maven parallel builds (skipping tests) fail (#4415) 2022-11-04 11:50:43 +00:00
hadoop-hdfs-project HDFS-16821: Fixes regression in HDFS-13522 that enables observer reads by default (#5078) 2022-11-07 08:43:04 -08:00
hadoop-mapreduce-project MAPREDUCE-7386. Maven parallel builds (skipping tests) fail (#4415) 2022-11-04 11:50:43 +00:00
hadoop-maven-plugins HADOOP-18441. Remove hadoop custom ServicesResourceTransformer (#4850). Contributed by PJ Fanning. 2022-09-07 17:11:12 +05:30
hadoop-minicluster HADOOP-18131. Upgrade maven enforcer plugin and relevant dependencies (#4000) 2022-03-08 17:27:04 +09:00
hadoop-project MAPREDUCE-7386. Maven parallel builds (skipping tests) fail (#4415) 2022-11-04 11:50:43 +00:00
hadoop-project-dist HADOOP-18305. Release Hadoop 3.3.4: upstream changelog and jdiff files 2022-08-05 14:06:22 +01:00
hadoop-tools HADOOP-18517. ABFS: Add fs.azure.enable.readahead option to disable readahead (#5103) 2022-11-08 11:43:04 +00:00
hadoop-yarn-project YARN-11368. [Federation] Improve Yarn Router's Federation Page style. (#5105) 2022-11-07 10:13:23 -08:00
licenses HADOOP-17144. Update Hadoop's lz4 to v1.9.2. Contributed by Hemanth Boyina. 2020-10-18 18:37:46 +05:30
licenses-binary HADOOP-15993. Upgrade Kafka to 2.4.0 in hadoop-kafka module. (#1796) 2020-01-09 16:24:58 +09:00
.asf.yaml HADOOP-17234. Addendum. Add .asf.yaml to allow github and jira integration. (#4686). Contributed by Ayush Saxena. 2022-08-05 08:34:56 +05:30
.gitattributes HADOOP-13598. Add eol=lf for unix format files in .gitattributes. Contributed by Yiqun Lin. 2016-09-14 11:14:31 +09:00
.gitignore YARN-10407. Add phantomjsdriver.log to gitignore. (#2244) 2020-09-01 10:44:55 +09:00
BUILDING.txt HADOOP-18506. Update build instructions for Windows using VS2019 (#5066) 2022-10-24 09:28:29 -07:00
LICENSE-binary HADOOP-18484. Upgrade hsqldb to v2.7.1 to mitigate CVE-2022-41853 (#4991) 2022-11-02 08:41:27 +01:00
LICENSE.txt YARN-11356. Upgrade DataTables to 1.11.5 to fix CVEs. Contributed by Bence Kosztolnik. 2022-10-26 22:29:01 +02:00
NOTICE-binary HADOOP-18068. upgrade AWS SDK to 1.12.132 (#3864) 2022-01-18 10:31:28 +00:00
NOTICE.txt HADOOP-15958. Revisiting LICENSE and NOTICE files. 2019-08-27 13:47:12 +09:00
pom.xml HADOOP-18297. Upgrade dependency-check-maven to 7.1.1 (#4449) 2022-07-03 04:04:55 +08:00
README.txt HADOOP-15958. Revisiting LICENSE and NOTICE files. 2019-08-27 13:47:12 +09:00
start-build-env.sh HADOOP-18052. Support Apple Silicon in start-build-env.sh (#3817) 2021-12-23 18:13:18 +09:00

For the latest information about Hadoop, please visit our website at:

   http://hadoop.apache.org/

and our wiki, at:

   https://cwiki.apache.org/confluence/display/HADOOP/