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Vinod Kumar Vavilapalli d71bb8385b YARN-1203. Changed YARN web-app proxy to handle http and https URLs from AM registration and finish correctly. Contributed by Omkar Vinit Joshi. 
MAPREDUCE-5515. Fixed MR AM's webapp to depend on a new config mapreduce.ssl.enabled to enable https and disabling it by default as MR AM needs
to set up its own certificates etc and not depend on clusters'. Contributed by Omkar Vinit Joshi.
svn merge --ignore-ancestry -c 1524864 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1524867 13f79535-47bb-0310-9956-ffa450edef68
 		2013-09-19 23:51:14 +00:00
..
bin YARN-1025. Merging change r1521670 from trunk to branch-2. 2013-09-10 22:52:55 +00:00
conf YARN-1137. Add support whitelist for system users to Yarn container-executor.c. (rvs via tucu) 2013-09-16 11:02:13 +00:00
dev-support YARN-926. Modified ContainerManagerProtcol APIs to take in requests for multiple containers. Contributed by Jian He. 2013-07-24 03:42:52 +00:00
hadoop-yarn-api YARN-1203. Changed YARN web-app proxy to handle http and https URLs from AM registration and finish correctly. Contributed by Omkar Vinit Joshi. 2013-09-19 23:51:14 +00:00
hadoop-yarn-applications YARN-945. Removed setting of AMRMToken's service from ResourceManager and changed client libraries do it all the time and correctly. Contributed by Vinod Kumar Vavilapalli. 2013-07-29 23:18:10 +00:00
hadoop-yarn-client Merge r1523376 from trunk to branch-2 for YARN-540. Race condition causing RM to potentially relaunch already unregistered AMs on RM restart (Jian He via bikas) 2013-09-15 01:07:11 +00:00
hadoop-yarn-common Merge 1524829 from trunk to branch-2 for YARN-353. Add Zookeeper-based store implementation for RMStateStore. Contributed by Bikas Saha, Jian He and Karthik Kambatla. 2013-09-19 20:40:52 +00:00
hadoop-yarn-server YARN-1203. Changed YARN web-app proxy to handle http and https URLs from AM registration and finish correctly. Contributed by Omkar Vinit Joshi. 2013-09-19 23:51:14 +00:00
hadoop-yarn-site YARN-1001. Added a web-service to get statistics about per application-type per state for consumption by downstream projects. Contributed by Zhijie Shen. 2013-09-17 00:24:51 +00:00
README HADOOP-9872. Improve protoc version handling and detection. (tucu) 2013-08-14 22:29:46 +00:00
pom.xml Set version in branch-2 to 2.3.0-SNAPSHOT to reflect that we will only be adding new content to hadoop-2.3.0 and not hadoop-2.2.0. 2013-07-19 01:35:34 +00:00

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