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apache / hadoop-site / acd69fd5d74d6c974be73701408c3b5732c0c127 / . / content / docs / r3.2.4 / hadoop-yarn / hadoop-yarn-server / hadoop-yarn-server-router / apidocs / org / apache / hadoop / yarn / server / router / Router.html
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<div class="subTitle">org.apache.hadoop.yarn.server.router</div>
<h2 title="Class Router" class="title">Class Router</h2>
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<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
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<ul class="inheritance">
<li>org.apache.hadoop.service.AbstractService</li>
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<ul class="inheritance">
<li>org.apache.hadoop.service.CompositeService</li>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.yarn.server.router.Router</li>
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<pre>public class <span class="typeNameLabel">Router</span>
extends org.apache.hadoop.service.CompositeService</pre>
<div class="block">The router is a stateless YARN component which is the entry point to the
cluster. It can be deployed on multiple nodes behind a Virtual IP (VIP) with
a LoadBalancer.
The Router exposes the ApplicationClientProtocol (RPC and REST) to the
outside world, transparently hiding the presence of ResourceManager(s), which
allows users to request and update reservations, submit and kill
applications, and request status on running applications.
In addition, it exposes the ResourceManager Admin API.
This provides a placeholder for throttling mis-behaving clients (YARN-1546)
and masks the access to multiple RMs (YARN-3659).</div>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.service.CompositeService</h3>
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<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#SHUTDOWN_HOOK_PRIORITY">SHUTDOWN_HOOK_PRIORITY</a></span></code>
<div class="block">Priority of the Router shutdown hook.</div>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#webAppAddress">webAppAddress</a></span></code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#Router--">Router</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/yarn/server/router/clientrm/RouterClientRMService.html" title="class in org.apache.hadoop.yarn.server.router.clientrm">RouterClientRMService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#createClientRMProxyService--">createClientRMProxyService</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/yarn/server/router/rmadmin/RouterRMAdminService.html" title="class in org.apache.hadoop.yarn.server.router.rmadmin">RouterRMAdminService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#createRMAdminProxyService--">createRMAdminProxyService</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#doSecureLogin--">doSecureLogin</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>org.apache.hadoop.yarn.webapp.WebApp</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#getWebapp--">getWebapp</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#main-java.lang.String:A-">main</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]&nbsp;argv)</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#serviceInit-org.apache.hadoop.conf.Configuration-">serviceInit</a></span>(org.apache.hadoop.conf.Configuration&nbsp;config)</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#serviceStart--">serviceStart</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#serviceStop--">serviceStop</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#shutDown--">shutDown</a></span>()</code>&nbsp;</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/router/Router.html#startWepApp--">startWepApp</a></span>()</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.service.CompositeService</h3>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> webAppAddress</pre>
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<pre>public static final&nbsp;int SHUTDOWN_HOOK_PRIORITY</pre>
<div class="block">Priority of the Router shutdown hook.</div>
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<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.yarn.server.router.Router.SHUTDOWN_HOOK_PRIORITY">Constant Field Values</a></dd>
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<h4>Router</h4>
<pre>public&nbsp;Router()</pre>
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<pre>protected&nbsp;void&nbsp;doSecureLogin()
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>protected&nbsp;void&nbsp;serviceStop()
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<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<h4>shutDown</h4>
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<h4>createClientRMProxyService</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/server/router/clientrm/RouterClientRMService.html" title="class in org.apache.hadoop.yarn.server.router.clientrm">RouterClientRMService</a>&nbsp;createClientRMProxyService()</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/server/router/rmadmin/RouterRMAdminService.html" title="class in org.apache.hadoop.yarn.server.router.rmadmin">RouterRMAdminService</a>&nbsp;createRMAdminProxyService()</pre>
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<h4>getWebapp</h4>
<pre>@InterfaceAudience.Private
public&nbsp;org.apache.hadoop.yarn.webapp.WebApp&nbsp;getWebapp()</pre>
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<pre>public&nbsp;void&nbsp;startWepApp()</pre>
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<pre>public static&nbsp;void&nbsp;main(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]&nbsp;argv)</pre>
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