~~ Licensed under the Apache License, Version 2.0 (the "License");
~~ you may not use this file except in compliance with the License.
~~ You may obtain a copy of the License at
~~
~~   http://www.apache.org/licenses/LICENSE-2.0
~~
~~ Unless required by applicable law or agreed to in writing, software
~~ distributed under the License is distributed on an "AS IS" BASIS,
~~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
~~ See the License for the specific language governing permissions and
~~ limitations under the License. See accompanying LICENSE file.

  ---
  Yarn Commands
  ---
  ---
  ${maven.build.timestamp}

Yarn Commands

  \[ {{{./index.html}Go Back}} \]

%{toc|section=1|fromDepth=0}

* Overview

  Yarn commands are invoked by the bin/yarn script. Running the yarn script without any arguments prints the description for all commands.

------
Usage: yarn [--config confdir] COMMAND
------

  Yarn has an option parsing framework that employs parsing generic options as well as running classes.

*---------------+--------------+
|| COMMAND_OPTIONS || Description                   |
*---------------+--------------+
| --config confdir | Overwrites the default Configuration directory. Default is ${HADOOP_PREFIX}/conf. | 
*---------------+--------------+
| COMMAND COMMAND_OPTIONS | Various commands with their options are described in the following sections. The commands have been grouped into {{User Commands}} and {{Administration Commands}}. |
*---------------+--------------+

* {User Commands}

  Commands useful for users of a Hadoop cluster.

** jar

  Runs a jar file. Users can bundle their Yarn code in a jar file and execute it using this command.

-------
  Usage: yarn jar <jar> [mainClass] args...
-------

** application

  Prints application(s) report/kill application

-------
  Usage: yarn application <options>
-------

*---------------+--------------+
|| COMMAND_OPTIONS || Description                   |
*---------------+--------------+
| -status  ApplicationId | Specify an application id |
*---------------+--------------+
| -list | Lists all the Applications from RM |
*---------------+--------------+
| -kill ApplicationId | Specify an application id |
*---------------+--------------+

** node

  Prints node report(s)

-------
  Usage: yarn node <options>
-------

*---------------+--------------+
|| COMMAND_OPTIONS || Description                   |
*---------------+--------------+
| -status NodeId | Specify a node id |
*---------------+--------------+
| -list | Lists all the Nodes |
*---------------+--------------+

** logs

  Dump the container logs

-------
  Usage: yarn logs <options>
-------

*---------------+--------------+
|| COMMAND_OPTIONS || Description                   |
*---------------+--------------+
| -applicationId ApplicationId | Specify an application id |
*---------------+--------------+
| -appOwner AppOwner | Specify an application owner |
*---------------+--------------+
| -containerId ContainerId | Specify a container id |
*---------------+--------------+
| -nodeAddress NodeAddress | Specify a node address |
*---------------+--------------+

** classpath

  Prints the class path needed to get the Hadoop jar and the required libraries

-------
  Usage: yarn classpath
-------

** version

  Prints the version.

-------
  Usage: yarn version
-------


* {Administration Commands}

  Commands useful for administrators of a Hadoop cluster.

** resourcemanager

  Start the ResourceManager

-------
  Usage: yarn resourcemanager
-------

** nodemanager

  Start the NodeManager

-------
  Usage: yarn nodemanager
-------

** proxyserver

  Start the web proxy server

-------
  Usage: yarn proxyserver
-------

** rmadmin

  Runs ResourceManager admin client

-------
  Usage: yarn rmadmin [-refreshQueues] [-refreshNodes] [-refreshUserToGroupsMapping] 
                      [-refreshSuperUserGroupsConfiguration] [-refreshAdminAcls] 
                      [-refreshServiceAcl] [-help [cmd]]
-------

*---------------+--------------+
|| COMMAND_OPTIONS || Description                   |
*---------------+--------------+
| -refreshQueues | Reload the queues' acls, states and scheduler specific properties. ResourceManager will reload the mapred-queues configuration file. |
*---------------+--------------+
| -refreshNodes | Refresh the hosts information at the ResourceManager. |
*---------------+--------------+
| -refreshUserToGroupsMappings| Refresh user-to-groups mappings. |
*---------------+--------------+
| -refreshSuperUserGroupsConfiguration| Refresh superuser proxy groups mappings. |
*---------------+--------------+
| -refreshAdminAcls | Refresh acls for administration of ResourceManager |
*---------------+--------------+
| -refreshServiceAcl | Reload the service-level authorization policy file ResoureceManager will reload the authorization policy file. |
*---------------+--------------+
| -help [cmd] | Displays help for the given command or all commands if none is specified. |
*---------------+--------------+

** daemonlog

  Get/Set the log level for each daemon.

-------
  Usage: yarn daemonlog -getlevel <host:port> <name> 
  Usage: yarn daemonlog -setlevel <host:port> <name> <level>
-------

*---------------+--------------+
|| COMMAND_OPTIONS || Description                   |
*---------------+--------------+
| -getlevel <host:port> <name> | Prints the log level of the daemon running at <host:port>. This command internally connects to http://<host:port>/logLevel?log=<name> |
*---------------+--------------+
| -setlevel <host:port> <name> <level>  | Sets the log level of the daemon running at <host:port>. This command internally connects to http://<host:port>/logLevel?log=<name> |
*---------------+--------------+