hadoop/hadoop-yarn-project/hadoop-yarn
Sunil G 9e4e218ff0 YARN-6635. Refactor yarn-app pages in new YARN UI. Contributed by Akhil PB. 2017-10-18 02:06:49 +05:30
..
bin YARN-7190 Ensure only NM classpath in 2.x gets TSv2 related hbase jars, not the user classpath (Contributed by Varun Saxena via Vrushali C) 2017-10-17 23:36:41 +05:30
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-5355. Backported YARN-2928 into our branch-2 feature branch. 2017-10-17 23:36:33 +05:30
hadoop-yarn-api YARN-5698. [YARN-3368] Launch new YARN UI under hadoop web app port. (Sunil G via wangda) 2017-10-18 02:06:47 +05:30
hadoop-yarn-applications YARN-4675. Reorganize TimelineClient and TimelineClientImpl into separate classes for ATSv1.x and ATSv2. Contributed by Naganarasimha G R. 2017-10-17 23:36:36 +05:30
hadoop-yarn-client YARN-7152. [ATSv2] Registering timeline client before AMRMClient service init throw exception (Rohith Sharma K S via Varun Saxena) 2017-10-17 23:36:40 +05:30
hadoop-yarn-common YARN-5698. [YARN-3368] Launch new YARN UI under hadoop web app port. (Sunil G via wangda) 2017-10-18 02:06:47 +05:30
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-5698. [YARN-3368] Launch new YARN UI under hadoop web app port. (Sunil G via wangda) 2017-10-18 02:06:47 +05:30
hadoop-yarn-site YARN-4849. Addendum patch to improve pom for yarn-ui. (Wangda Tan via Sunil G) 2017-10-18 02:06:48 +05:30
hadoop-yarn-ui YARN-6635. Refactor yarn-app pages in new YARN UI. Contributed by Akhil PB. 2017-10-18 02:06:49 +05:30
README HADOOP-9872. Improve protoc version handling and detection. (tucu) 2013-08-14 22:29:46 +00:00
pom.xml YARN-5682. [YARN-3368] Fix maven build to keep all generated or downloaded files in target folder (Wangda Tan via Sunil G) 2017-10-18 02:06:47 +05:30

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