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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. --><div class="section">
<h2>Yarn Commands<a name="Yarn_Commands"></a></h2>
<p>[ <a href="./index.html">Go Back</a> ]</p>
<ul>
<li><a href="#Yarn_Commands">Yarn Commands</a>
<ul>
<li><a href="#Overview">Overview</a></li>
<li><a href="#User_Commands">User Commands</a>
<ul>
<li><a href="#jar">jar</a></li>
<li><a href="#application">application</a></li>
<li><a href="#node">node</a></li>
<li><a href="#logs">logs</a></li>
<li><a href="#classpath">classpath</a></li>
<li><a href="#version">version</a></li></ul></li>
<li><a href="#Administration_Commands">Administration Commands</a>
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<li><a href="#resourcemanager">resourcemanager</a></li>
<li><a href="#nodemanager">nodemanager</a></li>
<li><a href="#proxyserver">proxyserver</a></li>
<li><a href="#rmadmin">rmadmin</a></li>
<li><a href="#daemonlog">daemonlog</a></li></ul></li></ul></li></ul>
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<h3>Overview<a name="Overview"></a></h3>
<p>Yarn commands are invoked by the bin/yarn script. Running the yarn script without any arguments prints the description for all commands.</p>
<div>
<pre>Usage: yarn [--config confdir] COMMAND</pre></div>
<p>Yarn has an option parsing framework that employs parsing generic options as well as running classes.</p>
<table border="1" class="bodyTable">
<tr class="a">
<th align="left">COMMAND_OPTIONS</th>
<th align="left">Description</th></tr>
<tr class="b">
<td align="left">--config confdir</td>
<td align="left">Overwrites the default Configuration directory. Default is $<a name="HADOOP_PREFIX">HADOOP_PREFIX</a>/conf.</td></tr>
<tr class="a">
<td align="left">COMMAND COMMAND_OPTIONS</td>
<td align="left">Various commands with their options are described in the following sections. The commands have been grouped into <a href="#User_Commands">User Commands</a> and <a href="#Administration_Commands">Administration Commands</a>.</td></tr></table></div>
<div class="section">
<h3><a name="User_Commands">User Commands</a></h3>
<p>Commands useful for users of a Hadoop cluster.</p>
<div class="section">
<h4>jar<a name="jar"></a></h4>
<p>Runs a jar file. Users can bundle their Yarn code in a jar file and execute it using this command.</p>
<div>
<pre> Usage: yarn jar &lt;jar&gt; [mainClass] args...</pre></div></div>
<div class="section">
<h4>application<a name="application"></a></h4>
<p>Prints application(s) report/kill application</p>
<div>
<pre> Usage: yarn application &lt;options&gt;</pre></div>
<table border="1" class="bodyTable">
<tr class="a">
<th align="left">COMMAND_OPTIONS</th>
<th align="left">Description</th></tr>
<tr class="b">
<td align="left">-status ApplicationId</td>
<td align="left">Specify an application id</td></tr>
<tr class="a">
<td align="left">-list</td>
<td align="left">Lists all the Applications from RM</td></tr>
<tr class="b">
<td align="left">-kill ApplicationId</td>
<td align="left">Specify an application id</td></tr></table></div>
<div class="section">
<h4>node<a name="node"></a></h4>
<p>Prints node report(s)</p>
<div>
<pre> Usage: yarn node &lt;options&gt;</pre></div>
<table border="1" class="bodyTable">
<tr class="a">
<th align="left">COMMAND_OPTIONS</th>
<th align="left">Description</th></tr>
<tr class="b">
<td align="left">-status NodeId</td>
<td align="left">Specify a node id</td></tr>
<tr class="a">
<td align="left">-list</td>
<td align="left">Lists all the Nodes</td></tr></table></div>
<div class="section">
<h4>logs<a name="logs"></a></h4>
<p>Dump the container logs</p>
<div>
<pre> Usage: yarn logs &lt;options&gt;</pre></div>
<table border="1" class="bodyTable">
<tr class="a">
<th align="left">COMMAND_OPTIONS</th>
<th align="left">Description</th></tr>
<tr class="b">
<td align="left">-applicationId ApplicationId</td>
<td align="left">Specify an application id</td></tr>
<tr class="a">
<td align="left">-appOwner AppOwner</td>
<td align="left">Specify an application owner</td></tr>
<tr class="b">
<td align="left">-containerId ContainerId</td>
<td align="left">Specify a container id</td></tr>
<tr class="a">
<td align="left">-nodeAddress NodeAddress</td>
<td align="left">Specify a node address</td></tr></table></div>
<div class="section">
<h4>classpath<a name="classpath"></a></h4>
<p>Prints the class path needed to get the Hadoop jar and the required libraries</p>
<div>
<pre> Usage: yarn classpath</pre></div></div>
<div class="section">
<h4>version<a name="version"></a></h4>
<p>Prints the version.</p>
<div>
<pre> Usage: yarn version</pre></div></div></div>
<div class="section">
<h3><a name="Administration_Commands">Administration Commands</a></h3>
<p>Commands useful for administrators of a Hadoop cluster.</p>
<div class="section">
<h4>resourcemanager<a name="resourcemanager"></a></h4>
<p>Start the ResourceManager</p>
<div>
<pre> Usage: yarn resourcemanager</pre></div></div>
<div class="section">
<h4>nodemanager<a name="nodemanager"></a></h4>
<p>Start the NodeManager</p>
<div>
<pre> Usage: yarn nodemanager</pre></div></div>
<div class="section">
<h4>proxyserver<a name="proxyserver"></a></h4>
<p>Start the web proxy server</p>
<div>
<pre> Usage: yarn proxyserver</pre></div></div>
<div class="section">
<h4>rmadmin<a name="rmadmin"></a></h4>
<p>Runs ResourceManager admin client</p>
<div>
<pre> Usage: yarn rmadmin [-refreshQueues] [-refreshNodes] [-refreshUserToGroupsMapping]
[-refreshSuperUserGroupsConfiguration] [-refreshAdminAcls]
[-refreshServiceAcl] [-help [cmd]]</pre></div>
<table border="1" class="bodyTable">
<tr class="a">
<th align="left">COMMAND_OPTIONS</th>
<th align="left">Description</th></tr>
<tr class="b">
<td align="left">-refreshQueues</td>
<td align="left">Reload the queues' acls, states and scheduler specific properties. ResourceManager will reload the mapred-queues configuration file.</td></tr>
<tr class="a">
<td align="left">-refreshNodes</td>
<td align="left">Refresh the hosts information at the ResourceManager.</td></tr>
<tr class="b">
<td align="left">-refreshUserToGroupsMappings</td>
<td align="left">Refresh user-to-groups mappings.</td></tr>
<tr class="a">
<td align="left">-refreshSuperUserGroupsConfiguration</td>
<td align="left">Refresh superuser proxy groups mappings.</td></tr>
<tr class="b">
<td align="left">-refreshAdminAcls</td>
<td align="left">Refresh acls for administration of ResourceManager</td></tr>
<tr class="a">
<td align="left">-refreshServiceAcl</td>
<td align="left">Reload the service-level authorization policy file ResoureceManager will reload the authorization policy file.</td></tr>
<tr class="b">
<td align="left">-help [cmd]</td>
<td align="left">Displays help for the given command or all commands if none is specified.</td></tr></table></div>
<div class="section">
<h4>daemonlog<a name="daemonlog"></a></h4>
<p>Get/Set the log level for each daemon.</p>
<div>
<pre> Usage: yarn daemonlog -getlevel &lt;host:port&gt; &lt;name&gt;
Usage: yarn daemonlog -setlevel &lt;host:port&gt; &lt;name&gt; &lt;level&gt;</pre></div>
<table border="1" class="bodyTable">
<tr class="a">
<th align="left">COMMAND_OPTIONS</th>
<th align="left">Description</th></tr>
<tr class="b">
<td align="left">-getlevel <i>host:port</i> <i>name</i></td>
<td align="left">Prints the log level of the daemon running at <i>host:port</i>. This command internally connects to http://<i>host:port</i>/logLevel?log=<i>name</i></td></tr>
<tr class="a">
<td align="left">-setlevel <i>host:port</i> <i>name</i> <i>level</i></td>
<td align="left">Sets the log level of the daemon running at <i>host:port</i>. This command internally connects to http://<i>host:port</i>/logLevel?log=<i>name</i></td></tr></table></div></div></div>
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