hadoop/hadoop-yarn-project/hadoop-yarn
Gabor Bota 1943db5571
HADOOP-16237. Fix new findbugs issues after updating guava to 27.0-jre.
Author:    Gabor Bota <gabor.bota@cloudera.com>
2019-04-12 18:28:38 -07:00
..
bin HADOOP-15821. Move YARN Registry to Hadoop Registry. 2018-10-19 19:46:48 -04:00
conf YARN-9060. [YARN-8851] Phase 1 - Support device isolation and use the Nvidia GPU plugin as an example. Contributed by Zhankun Tang. 2019-02-18 15:58:04 +05:30
dev-support HADOOP-16237. Fix new findbugs issues after updating guava to 27.0-jre. 2019-04-12 18:28:38 -07:00
hadoop-yarn-api YARN-999. In case of long running tasks, reduce node resource should balloon out resource quickly by calling preemption API and suspending running task. Contributed by Inigo Goiri. 2019-04-09 10:59:43 -07:00
hadoop-yarn-applications YARN-9441. Updated YARN app catalog name for consistency. 2019-04-04 13:21:30 -04:00
hadoop-yarn-client YARN-9394. Use new API of RackResolver to get better performance. Contributed by Lantao Jin. 2019-04-04 18:05:01 +08:00
hadoop-yarn-common YARN-9335 [atsv2] Restrict the number of elements held in timeline collector when backend is unreachable for async calls. Contributed by Abhishesk Modi. 2019-04-05 12:06:51 -07:00
hadoop-yarn-csi YARN-9364. Remove commons-logging dependency from YARN. 2019-03-18 19:58:42 -04:00
hadoop-yarn-registry HADOOP-15821. Move YARN Registry to Hadoop Registry. 2018-10-19 19:46:48 -04:00
hadoop-yarn-server HADOOP-16237. Fix new findbugs issues after updating guava to 27.0-jre. 2019-04-12 18:28:38 -07:00
hadoop-yarn-site YARN-7129. Application Catalog for YARN applications. Contributed by Eric Yang 2019-03-29 13:51:21 -07:00
hadoop-yarn-ui YARN-8803. [UI2] Show flow runs in the order of recently created time in graph widgets. Contributed by Akhil PB. 2019-03-06 16:49:08 +05:30
shellprofile.d
pom.xml YARN-8873. [YARN-8811] Add CSI java-based client library. Contributed by Weiwei Yang. 2018-10-23 11:46:06 +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