hadoop/hadoop-yarn-project/hadoop-yarn
Vinod Kumar Vavilapalli 6ff765bea2 YARN-2826. Fixed user-groups mappings' refresh bug caused by YARN-2826. Contributed by Wangda Tan.
(cherry picked from commit df36edf751)
2014-11-07 19:45:23 -08:00
..
bin YARN-2827. Fixed bugs in "yarn queue" CLI. Contributed by Wangda Tan. 2014-11-07 12:01:33 -08:00
conf YARN-1982. Renamed the daemon name to be TimelineServer instead of History Server and deprecated the old usage. Contributed by Zhijie Shen. 2014-05-11 00:05:31 +00:00
dev-support YARN-2824. Fixed Capacity Scheduler to not crash when some node-labels are not mapped to queues by making default capacities per label to be zero. Contributed by Wangda Tan. 2014-11-07 10:45:01 -08:00
hadoop-yarn-api YARN-2804. Fixed Timeline service to not fill the logs with JAXB bindings exceptions. Contributed by Zhijie Shen. 2014-11-04 18:04:37 -08:00
hadoop-yarn-applications YARN-2824. Fixed Capacity Scheduler to not crash when some node-labels are not mapped to queues by making default capacities per label to be zero. Contributed by Wangda Tan. 2014-11-07 10:45:01 -08:00
hadoop-yarn-client YARN-2827. Fixed bugs in "yarn queue" CLI. Contributed by Wangda Tan. 2014-11-07 12:01:33 -08:00
hadoop-yarn-common YARN-2753. Fixed a bunch of bugs in the NodeLabelsManager classes. Contributed by Zhihai xu. 2014-11-07 14:17:23 -08:00
hadoop-yarn-registry YARN-2768 Improved Yarn Registry service record structure (stevel) 2014-11-06 20:21:49 +00:00
hadoop-yarn-server YARN-2826. Fixed user-groups mappings' refresh bug caused by YARN-2826. Contributed by Wangda Tan. 2014-11-07 19:45:23 -08:00
hadoop-yarn-site YARN-2632. Document NM Restart feature. Contributed by Junping Du and Vinod Kumar Vavilapalli 2014-11-07 23:42:26 +00:00
README HADOOP-9872. Improve protoc version handling and detection. (tucu) 2013-08-14 22:29:46 +00:00
pom.xml YARN-913 service registry: YARN-2652 add hadoop-yarn-registry package under hadoop-yarn 2014-10-08 12:54:37 -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