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hadoop/hadoop-yarn-project/hadoop-yarn
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Giovanni Matteo Fumarola 12c81610e0 YARN-9505. Add container allocation latency for Opportunistic Scheduler. Contributed by Abhishek Modi.
2019-05-17 12:03:21 -07:00
..
bin YARN-9528. Federation RMs starting up at the same time can give duplicate application IDs. Contributed by Young Chen. 2019-05-03 15:05:17 -07:00
conf YARN-9060. [YARN-8851] Phase 1 - Support device isolation and use the Nvidia GPU plugin as an example. Contributed by Zhankun Tang. 2019-02-18 15:58:04 +05:30
dev-support YARN-9495. Fix findbugs warnings in hadoop-yarn-server-resourcemanager module. Contributed by Tao Yang. 2019-04-20 21:51:00 +08:00
hadoop-yarn-api YARN-9539.Improve cleanup process of app activities and make some conditions configurable. Contributed by Tao Yang. 2019-05-12 22:31:39 -07:00
hadoop-yarn-applications YARN-9483. DistributedShell does not release container when failed to localize at launch. Contributed by Prabhu Joseph. 2019-05-09 10:59:31 -07:00
hadoop-yarn-client YARN-9453. Clean up code long if-else chain in ApplicationCLI#run. Contributed by Wanqiang Ji. 2019-05-13 11:11:20 -07:00
hadoop-yarn-common YARN-9547. ContainerStatusPBImpl default execution type is not returned. Contributed by Bilwa S T. 2019-05-15 13:21:39 +05:30
hadoop-yarn-csi YARN-9470. Fix order of actual and expected expression in assert statements 2019-04-18 15:40:37 +09:00
hadoop-yarn-registry HADOOP-15821. Move YARN Registry to Hadoop Registry. 2018-10-19 19:46:48 -04:00
hadoop-yarn-server YARN-9505. Add container allocation latency for Opportunistic Scheduler. Contributed by Abhishek Modi. 2019-05-17 12:03:21 -07:00
hadoop-yarn-site YARN-9535. Fixed spell check for container-executor in Docker documentation. 2019-05-08 16:56:26 -04:00
hadoop-yarn-ui YARN-9504. [UI2] Fair scheduler queue view page does not show actual capacity. Contributed by Zoltan Siegl. 2019-05-10 14:27:23 +05:30
shellprofile.d
pom.xml YARN-8873. [YARN-8811] Add CSI java-based client library. Contributed by Weiwei Yang. 2018-10-23 11:46:06 +05:30
README YARN-6943. Update Yarn to YARN in documentation. Contributed by Chetna Chaudhari. 2017-10-04 07:01:54 +09:00

README 

YARN (YET ANOTHER RESOURCE NEGOTIATOR or YARN Application Resource Negotiator)
------------------------------------------------------------------------------

Requirements
-------------
Java: JDK 1.6
Maven: Maven 3

Setup
-----
Install protobuf 2.5.0 (Download from http://code.google.com/p/protobuf/downloads/list)
 - install the protoc executable (configure, make, make install)
 - install the maven artifact (cd java; mvn install)


Quick Maven Tips
----------------
clean workspace: mvn clean
compile and test: mvn install
skip tests: mvn install -DskipTests
skip test execution but compile: mvn install -Dmaven.test.skip.exec=true
clean and test: mvn clean install
run selected test after compile: mvn test -Dtest=TestClassName (combined: mvn clean install -Dtest=TestClassName)
create runnable binaries after install: mvn assembly:assembly -Pnative (combined: mvn clean install assembly:assembly -Pnative)

Eclipse Projects
----------------
http://maven.apache.org/guides/mini/guide-ide-eclipse.html

1. Generate .project and .classpath files in all maven modules
mvn eclipse:eclipse
CAUTION: If the project structure has changed from your previous workspace, clean up all .project and .classpath files recursively. Then run:
mvn eclipse:eclipse

2. Import the projects in eclipse.

3. Set the environment variable M2_REPO to point to your .m2/repository location.

NetBeans Projects
-----------------

NetBeans has builtin support of maven projects. Just "Open Project..."
and everything is setup automatically. Verified with NetBeans 6.9.1.


Custom Hadoop Dependencies
--------------------------

By default Hadoop dependencies are specified in the top-level pom.xml
properties section. One can override them via -Dhadoop-common.version=...
on the command line. ~/.m2/settings.xml can also be used to specify
these properties in different profiles, which is useful for IDEs.

Modules
-------
YARN consists of multiple modules. The modules are listed below as per the directory structure:

hadoop-yarn-api - YARN's cross platform external interface

hadoop-yarn-common - Utilities which can be used by yarn clients and server

hadoop-yarn-server - Implementation of the hadoop-yarn-api
	hadoop-yarn-server-common - APIs shared between resourcemanager and nodemanager
	hadoop-yarn-server-nodemanager (TaskTracker replacement)
	hadoop-yarn-server-resourcemanager (JobTracker replacement)

Utilities for understanding the code
------------------------------------
Almost all of the yarn components as well as the mapreduce framework use
state-machines for all the data objects. To understand those central pieces of
the code, a visual representation of the state-machines helps much. You can first
convert the state-machines into graphviz(.gv) format by
running:
   mvn compile -Pvisualize
Then you can use the dot program for generating directed graphs and convert the above
.gv files to images. The graphviz package has the needed dot program and related
utilites.For e.g., to generate png files you can run:
   dot -Tpng NodeManager.gv > NodeManager.png