hadoop/hadoop-yarn-project/hadoop-yarn
Xuan 16b27573ef YARN-5953 addendum: Move QueueConfigInfo and SchedConfUpdateInfo to package org.apache.hadoop.yarn.webapp.dao 2017-10-09 11:12:07 -07:00
..
bin YARN-5953:Create CLI for changing YARN configurations. (Jonathan Hung via xgong) 2017-10-09 11:12:07 -07:00
conf YARN-6691. Update YARN daemon startup/shutdown scripts to include Router service. (Giovanni Matteo Fumarola via asuresh) 2017-09-28 11:41:43 -07:00
dev-support YARN-6955. Handle concurrent register AM requests in FederationInterceptor. (Botong Huang via Subru). 2017-09-28 13:11:19 -07:00
hadoop-yarn-api YARN-5949. Add pluggable configuration ACL policy interface and implementation. (Jonathan Hung via wangda) 2017-10-09 11:12:07 -07:00
hadoop-yarn-applications YARN-6978. Add updateContainer API to NMClient. (Kartheek Muthyala via asuresh) 2017-09-07 10:30:41 -07:00
hadoop-yarn-client YARN-5953:Create CLI for changing YARN configurations. (Jonathan Hung via xgong) 2017-10-09 11:12:07 -07:00
hadoop-yarn-common YARN-5953 addendum: Move QueueConfigInfo and SchedConfUpdateInfo to package org.apache.hadoop.yarn.webapp.dao 2017-10-09 11:12:07 -07:00
hadoop-yarn-registry YARN-6804. Allow custom hostname for docker containers in native services. Contributed by Billie Rinaldi 2017-08-09 11:12:38 -07:00
hadoop-yarn-server YARN-5953 addendum: Move QueueConfigInfo and SchedConfUpdateInfo to package org.apache.hadoop.yarn.webapp.dao 2017-10-09 11:12:07 -07:00
hadoop-yarn-site YARN-2162. Add ability in Fair Scheduler to optionally configure maxResources in terms of percentage. (Yufei Gu) 2017-10-06 00:35:03 -07:00
README
pom.xml YARN-5300. Exclude generated federation protobuf sources from YARN Javadoc/findbugs build 2017-09-21 16:00:34 -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