hadoop/hadoop-yarn-project/hadoop-yarn
Zhijie Shen 1550617e48 YARN-2752. Made ContainerExecutor append "nice -n" arg only when priority adjustment flag is set. Contributed by Xuan Gong.
(cherry picked from commit e06c23a6c9)
2014-11-04 15:54:28 -08:00
..
bin YARN-2131. Addendum. Add a way to format the RMStateStore. (Robert Kanter via kasha) 2014-07-22 01:33:17 +00:00
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-2496. Enhanced Capacity Scheduler to have basic support for allocating resources based on node-labels. Contributed by Wangda Tan. 2014-10-15 18:35:34 -07:00
hadoop-yarn-api YARN-2789. Re-instated the NodeReport.newInstance private unstable API modified in YARN-2698 so that tests in YARN frameworks don't break. Contributed by Wangda Tan. 2014-10-31 15:34:07 -07:00
hadoop-yarn-applications YARN-2769. Fixed the problem that timeline domain is not set in distributed shell AM when using shell_command on Windows. Contributed by Varun Vasudev. 2014-10-29 12:15:54 -07:00
hadoop-yarn-client YARN-2788. Fixed backwards compatiblity issues with log-aggregation feature that were caused when adding log-upload-time via YARN-2703. Contributed by Xuan Gong. 2014-11-03 13:20:01 -08:00
hadoop-yarn-common YARN-2788. Fixed backwards compatiblity issues with log-aggregation feature that were caused when adding log-upload-time via YARN-2703. Contributed by Xuan Gong. 2014-11-03 13:20:01 -08:00
hadoop-yarn-registry YARN-2677 registry punycoding of usernames doesn't fix all usernames to be DNS-valid (stevel) 2014-10-30 22:32:08 +00:00
hadoop-yarn-server YARN-2752. Made ContainerExecutor append "nice -n" arg only when priority adjustment flag is set. Contributed by Xuan Gong. 2014-11-04 15:54:28 -08:00
hadoop-yarn-site YARN-2760. Remove 'experimental' from FairScheduler docs. (Harsh J via kasha) 2014-10-28 08:50:04 -07:00
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