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Allen Wittenauer 58ed4fa544 HADOOP-13341. Deprecate HADOOP_SERVERNAME_OPTS; replace with (command)_(subcommand)_OPTS 
This commit includes the following changes:

	HADOOP-13356. Add a function to handle command_subcommand_OPTS
	HADOOP-13355. Handle HADOOP_CLIENT_OPTS in a function
	HADOOP-13554. Add an equivalent of hadoop_subcmd_opts for secure opts
	HADOOP-13562. Change hadoop_subcommand_opts to use only uppercase
	HADOOP-13358. Modify HDFS to use hadoop_subcommand_opts
	HADOOP-13357. Modify common to use hadoop_subcommand_opts
	HADOOP-13359. Modify YARN to use hadoop_subcommand_opts
	HADOOP-13361. Modify hadoop_verify_user to be consistent with hadoop_subcommand_opts (ie more granularity)
	HADOOP-13564. modify mapred to use hadoop_subcommand_opts
	HADOOP-13563. hadoop_subcommand_opts should print name not actual content during debug
	HADOOP-13360. Documentation for HADOOP_subcommand_OPTS

This closes apache/hadoop#126
 		2016-09-12 11:10:00 -07:00
..
bin HADOOP-13341. Deprecate HADOOP_SERVERNAME_OPTS; replace with (command)_(subcommand)_OPTS 2016-09-12 11:10:00 -07:00
conf YARN-5431. TimelineReader daemon start should allow to pass its own reader opts (Rohith Sharma K S via Varun Saxena) 2016-07-28 08:36:09 +05:30
dev-support YARN-4091. Add REST API to retrieve scheduler activity. (Chen Ge and Sunil G via wangda) 2016-08-05 10:27:34 -07:00
hadoop-yarn-api YARN-5549. AMLauncher#createAMContainerLaunchContext() should not log the command to be launched indiscriminately. (Daniel Templeton via rchiang) 2016-09-02 11:14:35 -07:00
hadoop-yarn-applications YARN-5221. Expose UpdateResourceRequest API to allow AM to request for change in container properties. (asuresh) 2016-08-30 15:52:29 -07:00
hadoop-yarn-client YARN-5608. TestAMRMClient.setup() fails with ArrayOutOfBoundsException. Contributed by Daniel Templeton. 2016-09-06 14:09:45 +05:30
hadoop-yarn-common YARN-5549. AMLauncher#createAMContainerLaunchContext() should not log the command to be launched indiscriminately. (Daniel Templeton via rchiang) 2016-09-02 11:14:35 -07:00
hadoop-yarn-registry HADOOP-13382. Remove unneeded commons-httpclient dependencies from POM files in Hadoop and sub-projects, while adding it in to the only place it is still needed, hadoop-openstack. Contributed by Matt Foley. 2016-07-21 14:43:57 -07:00
hadoop-yarn-server YARN-5616. Clean up WeightAdjuster. (Yufei Gu via kasha) 2016-09-06 22:40:20 -07:00
hadoop-yarn-site YARN-4676. Automatic and Asynchronous Decommissioning Nodes Status Tracking. Contributed by Diniel Zhi. 2016-08-18 07:27:23 -07:00
shellprofile.d HADOOP-12930. Dynamic subcommands for hadoop shell scripts (aw) 2016-05-16 17:54:45 -07:00
README HADOOP-9872. Improve protoc version handling and detection. (tucu) 2013-08-14 22:15:04 +00:00
pom.xml Preparing for 3.0.0-alpha2 development 2016-07-15 19:04:17 -07:00

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