content/docs/r3.3.1/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/apidocs/org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html - hadoop-site - Git at Google

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 <div class="subTitle">org.apache.hadoop.yarn.server.nodemanager</div>
 <h2 title="Class LinuxContainerExecutor" class="title">Class LinuxContainerExecutor</h2>
 </div>
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 <li>
 <ul class="inheritance">
 <li><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">org.apache.hadoop.yarn.server.nodemanager.ContainerExecutor</a></li>
 <li>
 <ul class="inheritance">
 <li>org.apache.hadoop.yarn.server.nodemanager.LinuxContainerExecutor</li>
 </ul>
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 <dd>org.apache.hadoop.conf.Configurable</dd>
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 <br>
 <pre>public class <span class="typeNameLabel">LinuxContainerExecutor</span>
 extends <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></pre>
 <div class="block"><p>This class provides <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/container/Container.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.container"><code>Container</code></a> execution using a native
  <code>container-executor</code> binary. By using a helper written it native code,
  this class is able to do several things that the
  <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/DefaultContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager"><code>DefaultContainerExecutor</code></a> cannot, such as execution of applications
  as the applications' owners, provide localization that takes advantage of
  mapping the application owner to a UID on the execution host, resource
  management through Linux CGROUPS, and Docker support.</p>

  <p>If <code>hadoop.security.authentication</code> is set to <code>simple</code>,
  then the
  <code>yarn.nodemanager.linux-container-executor.nonsecure-mode.limit-users</code>
  property will determine whether the <code>LinuxContainerExecutor</code> runs
  processes as the application owner or as the default user, as set in the
  <code>yarn.nodemanager.linux-container-executor.nonsecure-mode.local-user</code>
  property.</p>

  <p>The <code>LinuxContainerExecutor</code> will manage applications through an
  appropriate <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/LinuxContainerRuntime.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>LinuxContainerRuntime</code></a> instance. This class uses a
  <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/DelegatingLinuxContainerRuntime.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>DelegatingLinuxContainerRuntime</code></a> instance, which will delegate calls
  to either a <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/DefaultLinuxContainerRuntime.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>DefaultLinuxContainerRuntime</code></a> instance or a
  <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/OCIContainerRuntime.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>OCIContainerRuntime</code></a> instance, depending on the job's
  configuration.</p></div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/LinuxContainerRuntime.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>LinuxContainerRuntime</code></a>,
 <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/DelegatingLinuxContainerRuntime.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>DelegatingLinuxContainerRuntime</code></a>,
 <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/DefaultLinuxContainerRuntime.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>DefaultLinuxContainerRuntime</code></a>,
 <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/DockerLinuxContainerRuntime.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>DockerLinuxContainerRuntime</code></a>,
 <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/OCIContainerRuntime.html#isOCICompliantContainerRequested-org.apache.hadoop.conf.Configuration-java.util.Map-"><code>OCIContainerRuntime.isOCICompliantContainerRequested(org.apache.hadoop.conf.Configuration, java.util.Map&lt;java.lang.String, java.lang.String&gt;)</code></a></dd>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Class and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.ExitCode.html" title="enum in org.apache.hadoop.yarn.server.nodemanager">LinuxContainerExecutor.ExitCode</a></span></code>
 <div class="block">The container exit code.</div>
 </td>
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 <h3>Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.yarn.server.nodemanager.<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></h3>
 <code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.DelayedProcessKiller.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor.DelayedProcessKiller</a>, <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.Signal.html" title="enum in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor.Signal</a></code></li>
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 <!--   -->
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 <h3>Fields inherited from class&nbsp;org.apache.hadoop.yarn.server.nodemanager.<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></h3>
 <code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#DIRECTORY_CONTENTS">DIRECTORY_CONTENTS</a>, <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#TASK_LAUNCH_SCRIPT_PERMISSION">TASK_LAUNCH_SCRIPT_PERMISSION</a>, <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#TOKEN_FILE_NAME_FMT">TOKEN_FILE_NAME_FMT</a>, <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#WILDCARD">WILDCARD</a></code></li>
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 <th class="colOne" scope="col">Constructor and Description</th>
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 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#LinuxContainerExecutor--">LinuxContainerExecutor</a></span>()</code>
 <div class="block">Default constructor to allow for creation through reflection.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#LinuxContainerExecutor-org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.LinuxContainerRuntime-">LinuxContainerExecutor</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/LinuxContainerRuntime.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime">LinuxContainerRuntime</a>&nbsp;linuxContainerRuntime)</code>
 <div class="block">Create a LinuxContainerExecutor with a provided
  <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/LinuxContainerRuntime.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>LinuxContainerRuntime</code></a>.</div>
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 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#addSchedPriorityCommand-java.util.List-">addSchedPriorityCommand</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<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>&gt;&nbsp;command)</code>
 <div class="block">Add a niceness level to the process that will be executed.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#buildMainArgs-java.util.List-java.lang.String-java.lang.String-java.lang.String-java.net.InetSocketAddress-java.lang.String-java.util.List-">buildMainArgs</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<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>&gt;&nbsp;command,
              <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;user,
              <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;appId,
              <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;locId,
              <a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetSocketAddress.html?is-external=true" title="class or interface in java.net">InetSocketAddress</a>&nbsp;nmAddr,
              <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;tokenFileName,
              <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<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>&gt;&nbsp;localDirs)</code>
 <div class="block">Set up the <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer"><code>ContainerLocalizer</code></a>.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#deleteAsUser-org.apache.hadoop.yarn.server.nodemanager.executor.DeletionAsUserContext-">deleteAsUser</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/DeletionAsUserContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">DeletionAsUserContext</a>&nbsp;ctx)</code>
 <div class="block">Delete specified directories as a given user.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>org.apache.hadoop.hdfs.protocol.datatransfer.IOStreamPair</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#execContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerExecContext-">execContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerExecContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerExecContext</a>&nbsp;ctx)</code>
 <div class="block">Performs container exec.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>protected <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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#getContainerExecutorExecutablePath-org.apache.hadoop.conf.Configuration-">getContainerExecutorExecutablePath</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
 <div class="block">Get the path to the <code>container-executor</code> binary.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#getExposedPorts-org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container-">getExposedPorts</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/container/Container.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.container">Container</a>&nbsp;container)</code>&nbsp;</td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><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>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#getIpAndHost-org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container-">getIpAndHost</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/container/Container.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.container">Container</a>&nbsp;container)</code>&nbsp;</td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,org.apache.hadoop.yarn.api.records.LocalResource&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#getLocalResources-org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container-">getLocalResources</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/container/Container.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.container">Container</a>&nbsp;container)</code>&nbsp;</td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/privileged/PrivilegedOperationExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged">PrivilegedOperationExecutor</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#getPrivilegedOperationExecutor--">getPrivilegedOperationExecutor</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/resources/ResourceHandler.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources">ResourceHandler</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#getResourceHandler--">getResourceHandler</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#init-org.apache.hadoop.yarn.server.nodemanager.Context-">init</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/Context.html" title="interface in org.apache.hadoop.yarn.server.nodemanager">Context</a>&nbsp;context)</code>
 <div class="block">Run the executor initialization steps.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#isContainerAlive-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerLivenessContext-">isContainerAlive</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerLivenessContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerLivenessContext</a>&nbsp;ctx)</code>
 <div class="block">Check if a container is alive.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#launchContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext-">launchContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerStartContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerStartContext</a>&nbsp;ctx)</code>
 <div class="block">Launch the container on the node.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#mountCgroups-java.util.List-java.lang.String-">mountCgroups</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<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>&gt;&nbsp;cgroupKVs,
             <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;hierarchy)</code>
 <div class="block">Mount a CGROUPS controller at the requested mount point and create
  a hierarchy for the NodeManager to manage.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#prepareContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerPrepareContext-">prepareContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerPrepareContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerPrepareContext</a>&nbsp;ctx)</code>
 <div class="block">Prepare the container prior to the launch environment being written.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#reacquireContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerReacquisitionContext-">reacquireContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerReacquisitionContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerReacquisitionContext</a>&nbsp;ctx)</code>
 <div class="block">Recover an already existing container.</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#readDirAsUser-java.lang.String-org.apache.hadoop.fs.Path-">readDirAsUser</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;user,
              org.apache.hadoop.fs.Path&nbsp;dir)</code>
 <div class="block">Return the files in the target directory.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#reapContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerReapContext-">reapContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerReapContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerReapContext</a>&nbsp;ctx)</code>
 <div class="block">Performs the tasks necessary to reap the container.</div>
 </td>
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 <tr id="i18" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#relaunchContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext-">relaunchContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerStartContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerStartContext</a>&nbsp;ctx)</code>
 <div class="block">Relaunch the container on the node.</div>
 </td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#removeDockerContainer-java.lang.String-">removeDockerContainer</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;containerId)</code>
 <div class="block">Remove the docker container referenced in the context.</div>
 </td>
 </tr>
 <tr id="i20" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#signalContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerSignalContext-">signalContainer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerSignalContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerSignalContext</a>&nbsp;ctx)</code>
 <div class="block">Signal container with the specified signal.</div>
 </td>
 </tr>
 <tr id="i22" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#start--">start</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#startLocalizer-org.apache.hadoop.yarn.server.nodemanager.executor.LocalizerStartContext-">startLocalizer</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/LocalizerStartContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">LocalizerStartContext</a>&nbsp;ctx)</code>
 <div class="block">Prepare the environment for containers in this application to execute.</div>
 </td>
 </tr>
 <tr id="i24" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#stop--">stop</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i25" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#symLink-java.lang.String-java.lang.String-">symLink</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;target,
        <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;symlink)</code>
 <div class="block">Create a symlink file which points to the target.</div>
 </td>
 </tr>
 <tr id="i26" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/LinuxContainerExecutor.html#updateYarnSysFS-org.apache.hadoop.yarn.server.nodemanager.Context-java.lang.String-java.lang.String-java.lang.String-">updateYarnSysFS</a></span>(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/Context.html" title="interface in org.apache.hadoop.yarn.server.nodemanager">Context</a>&nbsp;ctx,
                <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;user,
                <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;appId,
                <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;spec)</code>
 <div class="block">Update cluster information inside container.</div>
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 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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 <h4>LinuxContainerExecutor</h4>
 <pre>public&nbsp;LinuxContainerExecutor()</pre>
 <div class="block">Default constructor to allow for creation through reflection.</div>
 </li>
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 <pre>public&nbsp;LinuxContainerExecutor(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/LinuxContainerRuntime.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime">LinuxContainerRuntime</a>&nbsp;linuxContainerRuntime)</pre>
 <div class="block">Create a LinuxContainerExecutor with a provided
  <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/runtime/LinuxContainerRuntime.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime"><code>LinuxContainerRuntime</code></a>.  Used primarily for testing.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>linuxContainerRuntime</code> - the runtime to use</dd>
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 <pre>public&nbsp;void&nbsp;setConf(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code>setConf</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.conf.Configurable</code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
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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>&nbsp;getContainerExecutorExecutablePath(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
 <div class="block">Get the path to the <code>container-executor</code> binary. The path will
  be absolute.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>conf</code> - the <code>Configuration</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the path to the <code>container-executor</code> binary</dd>
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 <div class="block">Add a niceness level to the process that will be executed.  Adds
  <code>-n &lt;nice&gt;</code> to the given command. The niceness level will be
  taken from the
  <code>YarnConfiguration.NM_CONTAINER_EXECUTOR_SCHED_PRIORITY</code> property.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>command</code> - the command to which to add the niceness setting.</dd>
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 <pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/linux/privileged/PrivilegedOperationExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.privileged">PrivilegedOperationExecutor</a>&nbsp;getPrivilegedOperationExecutor()</pre>
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 <h4>init</h4>
 <pre>public&nbsp;void&nbsp;init(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/Context.html" title="interface in org.apache.hadoop.yarn.server.nodemanager">Context</a>&nbsp;context)
           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>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#init-org.apache.hadoop.yarn.server.nodemanager.Context-">ContainerExecutor</a></code></span></div>
 <div class="block">Run the executor initialization steps.
  Verify that the necessary configs and permissions are in place.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#init-org.apache.hadoop.yarn.server.nodemanager.Context-">init</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>context</code> - Context of NM</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if initialization fails</dd>
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 <pre>public&nbsp;void&nbsp;start()</pre>
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 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#start--">start</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
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 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#stop--">stop</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
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 <pre>public&nbsp;void&nbsp;startLocalizer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/LocalizerStartContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">LocalizerStartContext</a>&nbsp;ctx)
                     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>,
                            <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#startLocalizer-org.apache.hadoop.yarn.server.nodemanager.executor.LocalizerStartContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Prepare the environment for containers in this application to execute.
  <pre>
  For $x in local.dirs
    create $x/$user/$appId
  Copy $nmLocal/appTokens  -&gt; $N/$user/$appId
  For $rsrc in private resources
    Copy $rsrc  -&gt; $N/$user/filecache/[idef]
  For $rsrc in job resources
    Copy $rsrc  -&gt; $N/$user/$appId/filecache/idef
  </pre></div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#startLocalizer-org.apache.hadoop.yarn.server.nodemanager.executor.LocalizerStartContext-">startLocalizer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - LocalizerStartContext that encapsulates necessary information
             for starting a localizer.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - for most application init failures</dd>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code> - if application init thread is halted by NM</dd>
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                           <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;user,
                           <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;appId,
                           <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;locId,
                           <a href="https://docs.oracle.com/javase/8/docs/api/java/net/InetSocketAddress.html?is-external=true" title="class or interface in java.net">InetSocketAddress</a>&nbsp;nmAddr,
                           <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;tokenFileName,
                           <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<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>&gt;&nbsp;localDirs)</pre>
 <div class="block">Set up the <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer"><code>ContainerLocalizer</code></a>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>command</code> - the current ShellCommandExecutor command line</dd>
 <dd><code>user</code> - localization user</dd>
 <dd><code>appId</code> - localized app id</dd>
 <dd><code>locId</code> - localizer id</dd>
 <dd><code>nmAddr</code> - nodemanager address</dd>
 <dd><code>localDirs</code> - list of local dirs</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.html#buildMainArgs-java.util.List-java.lang.String-java.lang.String-java.lang.String-java.net.InetSocketAddress-java.lang.String-java.util.List-org.apache.hadoop.conf.Configuration-"><code>ContainerLocalizer.buildMainArgs(java.util.List&lt;java.lang.String&gt;, java.lang.String, java.lang.String, java.lang.String, java.net.InetSocketAddress, java.lang.String, java.util.List&lt;java.lang.String&gt;, org.apache.hadoop.conf.Configuration)</code></a></dd>
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 </li>
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 <pre>public&nbsp;void&nbsp;prepareContainer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerPrepareContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerPrepareContext</a>&nbsp;ctx)
                       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>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#prepareContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerPrepareContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Prepare the container prior to the launch environment being written.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#prepareContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerPrepareContext-">prepareContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for launching containers.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if errors occur during container preparation</dd>
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 <pre>public&nbsp;int&nbsp;launchContainer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerStartContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerStartContext</a>&nbsp;ctx)
                     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>,
                            org.apache.hadoop.yarn.exceptions.ConfigurationException</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#launchContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Launch the container on the node. This is a blocking call and returns only
  when the container exits.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#launchContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext-">launchContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for launching containers.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the return status of the launch</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if the container launch fails</dd>
 <dd><code>org.apache.hadoop.yarn.exceptions.ConfigurationException</code> - if config error was found</dd>
 </dl>
 </li>
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 <pre>public&nbsp;int&nbsp;relaunchContainer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerStartContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerStartContext</a>&nbsp;ctx)
                       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>,
                              org.apache.hadoop.yarn.exceptions.ConfigurationException</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#relaunchContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Relaunch the container on the node. This is a blocking call and returns
  only when the container exits.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#relaunchContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerStartContext-">relaunchContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for relaunching containers.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the return status of the relaunch</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if the container relaunch fails</dd>
 <dd><code>org.apache.hadoop.yarn.exceptions.ConfigurationException</code> - if config error was found</dd>
 </dl>
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                       throws <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/runtime/ContainerExecutionException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.runtime">ContainerExecutionException</a></pre>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#getIpAndHost-org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container-">getIpAndHost</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/runtime/ContainerExecutionException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.runtime">ContainerExecutionException</a></code></dd>
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                        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>,
                               <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#reacquireContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerReacquisitionContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Recover an already existing container. This is a blocking call and returns
  only when the container exits.  Note that the container must have been
  activated prior to this call.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#reacquireContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerReacquisitionContext-">reacquireContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - encapsulates information necessary to reacquire container</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>The exit code of the pre-existing container</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if there is a failure while reacquiring the container</dd>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code> - if interrupted while waiting to reacquire
  the container</dd>
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 <pre>public&nbsp;boolean&nbsp;signalContainer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerSignalContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerSignalContext</a>&nbsp;ctx)
                         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>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#signalContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerSignalContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Signal container with the specified signal.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#signalContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerSignalContext-">signalContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for signaling containers.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>returns true if the operation succeeded</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if signaling the container fails</dd>
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 <pre>public&nbsp;boolean&nbsp;reapContainer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerReapContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerReapContext</a>&nbsp;ctx)
                       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>
 <div class="block">Performs the tasks necessary to reap the container.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#reapContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerReapContext-">reapContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for reaping containers.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if the reaping was successful.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if an error occurs while reaping the container.</dd>
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 <pre>public&nbsp;org.apache.hadoop.hdfs.protocol.datatransfer.IOStreamPair&nbsp;execContainer(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerExecContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerExecContext</a>&nbsp;ctx)
                                                                         throws <a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/runtime/ContainerExecutionException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.runtime">ContainerExecutionException</a></pre>
 <div class="block">Performs container exec.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#execContainer-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerExecContext-">execContainer</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for exec container.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>stdin and stdout of container exec.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/runtime/ContainerExecutionException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.runtime">ContainerExecutionException</a></code> - if container exec fails.</dd>
 </dl>
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 <pre>public&nbsp;void&nbsp;deleteAsUser(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/DeletionAsUserContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">DeletionAsUserContext</a>&nbsp;ctx)</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#deleteAsUser-org.apache.hadoop.yarn.server.nodemanager.executor.DeletionAsUserContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Delete specified directories as a given user.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#deleteAsUser-org.apache.hadoop.yarn.server.nodemanager.executor.DeletionAsUserContext-">deleteAsUser</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for deletion.</dd>
 </dl>
 </li>
 </ul>
 <a name="readDirAsUser-java.lang.String-org.apache.hadoop.fs.Path-">
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 <pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</a>[]&nbsp;readDirAsUser(<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;user,
                                org.apache.hadoop.fs.Path&nbsp;dir)</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#readDirAsUser-java.lang.String-org.apache.hadoop.fs.Path-">ContainerExecutor</a></code></span></div>
 <div class="block">Return the files in the target directory. If retrieving the list of files
  requires specific access rights, that access will happen as the
  specified user. The list will not include entries for "." or "..".</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#readDirAsUser-java.lang.String-org.apache.hadoop.fs.Path-">readDirAsUser</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>user</code> - the user as whom to access the target directory</dd>
 <dd><code>dir</code> - the target directory</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a list of files in the target directory</dd>
 </dl>
 </li>
 </ul>
 <a name="symLink-java.lang.String-java.lang.String-">
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 <h4>symLink</h4>
 <pre>public&nbsp;void&nbsp;symLink(<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;target,
                     <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;symlink)</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#symLink-java.lang.String-java.lang.String-">ContainerExecutor</a></code></span></div>
 <div class="block">Create a symlink file which points to the target.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#symLink-java.lang.String-java.lang.String-">symLink</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>target</code> - The target for symlink</dd>
 <dd><code>symlink</code> - the symlink file</dd>
 </dl>
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 <pre>public&nbsp;boolean&nbsp;isContainerAlive(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/executor/ContainerLivenessContext.html" title="class in org.apache.hadoop.yarn.server.nodemanager.executor">ContainerLivenessContext</a>&nbsp;ctx)
                          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>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#isContainerAlive-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerLivenessContext-">ContainerExecutor</a></code></span></div>
 <div class="block">Check if a container is alive.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#isContainerAlive-org.apache.hadoop.yarn.server.nodemanager.executor.ContainerLivenessContext-">isContainerAlive</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - Encapsulates information necessary for container liveness check.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true if container is still alive</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if there is a failure while checking the container
  status</dd>
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 <pre>public&nbsp;void&nbsp;mountCgroups(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<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>&gt;&nbsp;cgroupKVs,
                          <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;hierarchy)
                   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>
 <div class="block">Mount a CGROUPS controller at the requested mount point and create
  a hierarchy for the NodeManager to manage.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>cgroupKVs</code> - a key-value pair of the form
  <code>controller=mount-path</code></dd>
 <dd><code>hierarchy</code> - the top directory of the hierarchy for the NodeManager</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if there is a problem mounting the CGROUPS</dd>
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 <pre>public&nbsp;void&nbsp;removeDockerContainer(<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;containerId)</pre>
 <div class="block">Remove the docker container referenced in the context.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>containerId</code> - the containerId for the container.</dd>
 </dl>
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                             <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;user,
                             <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;appId,
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                      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>
 <div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#updateYarnSysFS-org.apache.hadoop.yarn.server.nodemanager.Context-java.lang.String-java.lang.String-java.lang.String-">ContainerExecutor</a></code></span></div>
 <div class="block">Update cluster information inside container.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#updateYarnSysFS-org.apache.hadoop.yarn.server.nodemanager.Context-java.lang.String-java.lang.String-java.lang.String-">updateYarnSysFS</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>ctx</code> - ContainerRuntimeContext</dd>
 <dd><code>user</code> - Owner of application</dd>
 <dd><code>appId</code> - YARN application ID</dd>
 <dd><code>spec</code> - Service Specification</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code> - if there is a failure while writing spec to disk</dd>
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 <pre>public&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>&nbsp;getExposedPorts(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/container/Container.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.container">Container</a>&nbsp;container)
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 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#getExposedPorts-org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container-">getExposedPorts</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/runtime/ContainerExecutionException.html" title="class in org.apache.hadoop.yarn.server.nodemanager.containermanager.runtime">ContainerExecutionException</a></code></dd>
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 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&lt;<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>,org.apache.hadoop.yarn.api.records.LocalResource&gt;&nbsp;getLocalResources(<a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/containermanager/container/Container.html" title="interface in org.apache.hadoop.yarn.server.nodemanager.containermanager.container">Container</a>&nbsp;container)
                                                                                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>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html#getLocalResources-org.apache.hadoop.yarn.server.nodemanager.containermanager.container.Container-">getLocalResources</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/yarn/server/nodemanager/ContainerExecutor.html" title="class in org.apache.hadoop.yarn.server.nodemanager">ContainerExecutor</a></code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><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></code></dd>
 </dl>
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