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~~ 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> |
*---------------+--------------+
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