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apache / hadoop-site / 952d547359cafef280f0a0324055741b2ed55be1 / . / content / docs / r3.3.1 / hadoop-mapreduce-client / hadoop-mapreduce-client-app / apidocs / org / apache / hadoop / mapreduce / v2 / app / MRAppMaster.html
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<div class="subTitle">org.apache.hadoop.mapreduce.v2.app</div>
<h2 title="Class MRAppMaster" class="title">Class MRAppMaster</h2>
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<ul class="inheritance">
<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>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.service.AbstractService</li>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.service.CompositeService</li>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.mapreduce.v2.app.MRAppMaster</li>
</ul>
</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, org.apache.hadoop.service.Service</dd>
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<pre>public class <span class="typeNameLabel">MRAppMaster</span>
extends org.apache.hadoop.service.CompositeService</pre>
<div class="block">The Map-Reduce Application Master.
The state machine is encapsulated in the implementation of Job interface.
All state changes happens via Job interface. Each event
results in a Finite State Transition in Job.
MR AppMaster is the composition of loosely coupled services. The services
interact with each other via events. The components resembles the
Actors model. The component acts on received event and send out the
events to other components.
This keeps it highly concurrent with no or minimal synchronization needs.
The events are dispatched by a central Dispatch mechanism. All components
register to the Dispatcher.
The information is shared across different components using AppContext.</div>
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<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<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>class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.RunningAppContext.html" title="class in org.apache.hadoop.mapreduce.v2.app">MRAppMaster.RunningAppContext</a></span></code>&nbsp;</td>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.service.CompositeService</h3>
<code>org.apache.hadoop.service.CompositeService.CompositeServiceShutdownHook</code></li>
</ul>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.hadoop.service.Service</h3>
<code>org.apache.hadoop.service.Service.STATE</code></li>
</ul>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected org.apache.hadoop.security.UserGroupInformation</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#currentUser">currentUser</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <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/mapreduce/v2/app/MRAppMaster.html#INTERMEDIATE_DATA_ENCRYPTION_ALGO">INTERMEDIATE_DATA_ENCRYPTION_ALGO</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#isLastAMRetry">isLastAMRetry</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#jobTokenSecretManager">jobTokenSecretManager</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/metrics/MRAppMetrics.html" title="class in org.apache.hadoop.mapreduce.v2.app.metrics">MRAppMetrics</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#metrics">metrics</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#SHUTDOWN_HOOK_PRIORITY">SHUTDOWN_HOOK_PRIORITY</a></span></code>
<div class="block">Priority of the MRAppMaster shutdown hook.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#successfullyUnregistered">successfullyUnregistered</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptListener.html" title="interface in org.apache.hadoop.mapreduce.v2.app">TaskAttemptListener</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#taskAttemptListener">taskAttemptListener</a></span></code>&nbsp;</td>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.service.CompositeService</h3>
<code>STOP_ONLY_STARTED_SERVICES</code></li>
</ul>
</li>
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<h3>Constructor Summary</h3>
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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/mapreduce/v2/app/MRAppMaster.html#MRAppMaster-org.apache.hadoop.yarn.api.records.ApplicationAttemptId-org.apache.hadoop.yarn.api.records.ContainerId-java.lang.String-int-int-org.apache.hadoop.yarn.util.Clock-long-">MRAppMaster</a></span>(org.apache.hadoop.yarn.api.records.ApplicationAttemptId&nbsp;applicationAttemptId,
org.apache.hadoop.yarn.api.records.ContainerId&nbsp;containerId,
<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;nmHost,
int&nbsp;nmPort,
int&nbsp;nmHttpPort,
org.apache.hadoop.yarn.util.Clock&nbsp;clock,
long&nbsp;appSubmitTime)</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#MRAppMaster-org.apache.hadoop.yarn.api.records.ApplicationAttemptId-org.apache.hadoop.yarn.api.records.ContainerId-java.lang.String-int-int-long-">MRAppMaster</a></span>(org.apache.hadoop.yarn.api.records.ApplicationAttemptId&nbsp;applicationAttemptId,
org.apache.hadoop.yarn.api.records.ContainerId&nbsp;containerId,
<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;nmHost,
int&nbsp;nmPort,
int&nbsp;nmHttpPort,
long&nbsp;appSubmitTime)</code>&nbsp;</td>
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<h3>Method Summary</h3>
<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="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#cleanupStagingDir--">cleanupStagingDir</a></span>()</code>
<div class="block">clean up staging directories for the job.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/client/ClientService.html" title="interface in org.apache.hadoop.mapreduce.v2.app.client">ClientService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createClientService-org.apache.hadoop.mapreduce.v2.app.AppContext-">createClientService</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>protected org.apache.hadoop.yarn.event.EventHandler&lt;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/commit/CommitterEvent.html" title="class in org.apache.hadoop.mapreduce.v2.app.commit">CommitterEvent</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createCommitterEventHandler-org.apache.hadoop.mapreduce.v2.app.AppContext-org.apache.hadoop.mapreduce.OutputCommitter-">createCommitterEventHandler</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context,
org.apache.hadoop.mapreduce.OutputCommitter&nbsp;committer)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/ContainerAllocator.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm">ContainerAllocator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createContainerAllocator-org.apache.hadoop.mapreduce.v2.app.client.ClientService-org.apache.hadoop.mapreduce.v2.app.AppContext-">createContainerAllocator</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/client/ClientService.html" title="interface in org.apache.hadoop.mapreduce.v2.app.client">ClientService</a>&nbsp;clientService,
<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/launcher/ContainerLauncher.html" title="interface in org.apache.hadoop.mapreduce.v2.app.launcher">ContainerLauncher</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createContainerLauncher-org.apache.hadoop.mapreduce.v2.app.AppContext-">createContainerLauncher</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.yarn.event.Dispatcher</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createDispatcher--">createDispatcher</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/job/Job.html" title="interface in org.apache.hadoop.mapreduce.v2.app.job">Job</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createJob-org.apache.hadoop.conf.Configuration-org.apache.hadoop.mapreduce.v2.app.job.JobStateInternal-java.lang.String-">createJob</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/job/JobStateInternal.html" title="enum in org.apache.hadoop.mapreduce.v2.app.job">JobStateInternal</a>&nbsp;forcedState,
<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;diagnostic)</code>
<div class="block">Create and initialize (but don't start) a single job.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.yarn.event.EventHandler&lt;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/job/event/JobFinishEvent.html" title="class in org.apache.hadoop.mapreduce.v2.app.job.event">JobFinishEvent</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createJobFinishEventHandler--">createJobFinishEventHandler</a></span>()</code>
<div class="block">create an event handler that handles the job finish event.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>protected org.apache.hadoop.yarn.event.EventHandler&lt;<a href="../../../../../../org/apache/hadoop/mapreduce/jobhistory/JobHistoryEvent.html" title="class in org.apache.hadoop.mapreduce.jobhistory">JobHistoryEvent</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createJobHistoryHandler-org.apache.hadoop.mapreduce.v2.app.AppContext-">createJobHistoryHandler</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/preemption/AMPreemptionPolicy.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm.preemption">AMPreemptionPolicy</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createPreemptionPolicy-org.apache.hadoop.conf.Configuration-">createPreemptionPolicy</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/speculate/Speculator.html" title="interface in org.apache.hadoop.mapreduce.v2.app.speculate">Speculator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createSpeculator-org.apache.hadoop.conf.Configuration-org.apache.hadoop.mapreduce.v2.app.AppContext-">createSpeculator</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.service.AbstractService</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createStagingDirCleaningService--">createStagingDirCleaningService</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptFinishingMonitor.html" title="class in org.apache.hadoop.mapreduce.v2.app">TaskAttemptFinishingMonitor</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createTaskAttemptFinishingMonitor-org.apache.hadoop.yarn.event.EventHandler-">createTaskAttemptFinishingMonitor</a></span>(org.apache.hadoop.yarn.event.EventHandler&nbsp;eventHandler)</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptListener.html" title="interface in org.apache.hadoop.mapreduce.v2.app">TaskAttemptListener</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#createTaskAttemptListener-org.apache.hadoop.mapreduce.v2.app.AppContext-org.apache.hadoop.mapreduce.v2.app.rm.preemption.AMPreemptionPolicy-">createTaskAttemptListener</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context,
<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/preemption/AMPreemptionPolicy.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm.preemption">AMPreemptionPolicy</a>&nbsp;preemptionPolicy)</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><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;org.apache.hadoop.mapreduce.v2.api.records.AMInfo&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getAllAMInfos--">getAllAMInfos</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>org.apache.hadoop.yarn.api.records.ApplicationId</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getAppID--">getAppID</a></span>()</code>&nbsp;</td>
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<tr id="i16" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.yarn.api.records.ApplicationAttemptId</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getAttemptID--">getAttemptID</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/client/ClientService.html" title="interface in org.apache.hadoop.mapreduce.v2.app.client">ClientService</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getClientService--">getClientService</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.mapreduce.OutputCommitter</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getCommitter--">getCommitter</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i19" 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;org.apache.hadoop.mapreduce.v2.api.records.TaskId,org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.TaskInfo&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getCompletedTaskFromPreviousRun--">getCompletedTaskFromPreviousRun</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/ContainerAllocator.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm">ContainerAllocator</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getContainerAllocator--">getContainerAllocator</a></span>()</code>&nbsp;</td>
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<tr id="i21" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/launcher/ContainerLauncher.html" title="interface in org.apache.hadoop.mapreduce.v2.app.launcher">ContainerLauncher</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getContainerLauncher--">getContainerLauncher</a></span>()</code>&nbsp;</td>
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<tr id="i22" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getContext--">getContext</a></span>()</code>&nbsp;</td>
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<tr id="i23" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.security.Credentials</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getCredentials--">getCredentials</a></span>()</code>&nbsp;</td>
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<tr id="i24" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.yarn.event.Dispatcher</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getDispatcher--">getDispatcher</a></span>()</code>&nbsp;</td>
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<tr id="i25" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.fs.FileSystem</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getFileSystem-org.apache.hadoop.conf.Configuration-">getFileSystem</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">Create the default file System for this job.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.mapreduce.v2.api.records.JobId</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getJobId--">getJobId</a></span>()</code>&nbsp;</td>
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<tr id="i27" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/RMHeartbeatHandler.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm">RMHeartbeatHandler</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getRMHeartbeatHandler--">getRMHeartbeatHandler</a></span>()</code>&nbsp;</td>
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<tr id="i28" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getStartCount--">getStartCount</a></span>()</code>&nbsp;</td>
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<tr id="i29" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptListener.html" title="interface in org.apache.hadoop.mapreduce.v2.app">TaskAttemptListener</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#getTaskAttemptListener--">getTaskAttemptListener</a></span>()</code>&nbsp;</td>
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<tr id="i30" class="altColor">
<td class="colFirst"><code>protected static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#initAndStartAppMaster-org.apache.hadoop.mapreduce.v2.app.MRAppMaster-org.apache.hadoop.mapred.JobConf-java.lang.String-">initAndStartAppMaster</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html" title="class in org.apache.hadoop.mapreduce.v2.app">MRAppMaster</a>&nbsp;appMaster,
org.apache.hadoop.mapred.JobConf&nbsp;conf,
<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;jobUserName)</code>&nbsp;</td>
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<tr id="i31" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#initJobCredentialsAndUGI-org.apache.hadoop.conf.Configuration-">initJobCredentialsAndUGI</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>
<div class="block">Obtain the tokens needed by the job and put them in the UGI</div>
</td>
</tr>
<tr id="i32" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#isLastAMRetry--">isLastAMRetry</a></span>()</code>&nbsp;</td>
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<tr id="i33" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#isNewApiCommitter--">isNewApiCommitter</a></span>()</code>&nbsp;</td>
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<tr id="i34" class="altColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#keepJobFiles-org.apache.hadoop.mapred.JobConf-java.lang.String-">keepJobFiles</a></span>(org.apache.hadoop.mapred.JobConf&nbsp;conf,
<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;jobTempDir)</code>&nbsp;</td>
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<tr id="i35" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.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;args)</code>&nbsp;</td>
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<tr id="i36" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#notifyIsLastAMRetry-boolean-">notifyIsLastAMRetry</a></span>(boolean&nbsp;isLastAMRetry)</code>&nbsp;</td>
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<tr id="i37" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#recovered--">recovered</a></span>()</code>&nbsp;</td>
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<tr id="i38" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#serviceInit-org.apache.hadoop.conf.Configuration-">serviceInit</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf)</code>&nbsp;</td>
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<tr id="i39" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#serviceStart--">serviceStart</a></span>()</code>&nbsp;</td>
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<tr id="i40" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#serviceStop--">serviceStop</a></span>()</code>&nbsp;</td>
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<tr id="i41" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#shutDownJob--">shutDownJob</a></span>()</code>&nbsp;</td>
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<tr id="i42" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#startJobs--">startJobs</a></span>()</code>
<div class="block">This can be overridden to instantiate multiple jobs and create a
workflow.</div>
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<tr id="i43" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#stop--">stop</a></span>()</code>&nbsp;</td>
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<tr id="i44" class="altColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/MRAppMaster.html#sysexit--">sysexit</a></span>()</code>
<div class="block">Exit call.</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.service.CompositeService</h3>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.service.AbstractService</h3>
<code>close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop</code></li>
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<pre>public static final&nbsp;int SHUTDOWN_HOOK_PRIORITY</pre>
<div class="block">Priority of the MRAppMaster shutdown hook.</div>
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<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.mapreduce.v2.app.MRAppMaster.SHUTDOWN_HOOK_PRIORITY">Constant Field Values</a></dd>
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<pre>public static final&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> INTERMEDIATE_DATA_ENCRYPTION_ALGO</pre>
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<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.mapreduce.v2.app.MRAppMaster.INTERMEDIATE_DATA_ENCRYPTION_ALGO">Constant Field Values</a></dd>
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<pre>protected final&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/metrics/MRAppMetrics.html" title="class in org.apache.hadoop.mapreduce.v2.app.metrics">MRAppMetrics</a> metrics</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptListener.html" title="interface in org.apache.hadoop.mapreduce.v2.app">TaskAttemptListener</a> taskAttemptListener</pre>
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<pre>protected&nbsp;org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager jobTokenSecretManager</pre>
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<pre>protected&nbsp;org.apache.hadoop.security.UserGroupInformation currentUser</pre>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a> successfullyUnregistered</pre>
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<pre>public&nbsp;MRAppMaster(org.apache.hadoop.yarn.api.records.ApplicationAttemptId&nbsp;applicationAttemptId,
org.apache.hadoop.yarn.api.records.ContainerId&nbsp;containerId,
<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;nmHost,
int&nbsp;nmPort,
int&nbsp;nmHttpPort,
long&nbsp;appSubmitTime)</pre>
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<pre>public&nbsp;MRAppMaster(org.apache.hadoop.yarn.api.records.ApplicationAttemptId&nbsp;applicationAttemptId,
org.apache.hadoop.yarn.api.records.ContainerId&nbsp;containerId,
<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;nmHost,
int&nbsp;nmPort,
int&nbsp;nmHttpPort,
org.apache.hadoop.yarn.util.Clock&nbsp;clock,
long&nbsp;appSubmitTime)</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptFinishingMonitor.html" title="class in org.apache.hadoop.mapreduce.v2.app">TaskAttemptFinishingMonitor</a>&nbsp;createTaskAttemptFinishingMonitor(org.apache.hadoop.yarn.event.EventHandler&nbsp;eventHandler)</pre>
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<pre>protected&nbsp;void&nbsp;serviceInit(org.apache.hadoop.conf.Configuration&nbsp;conf)
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>serviceInit</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.service.CompositeService</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<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>createDispatcher</h4>
<pre>protected&nbsp;org.apache.hadoop.yarn.event.Dispatcher&nbsp;createDispatcher()</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/preemption/AMPreemptionPolicy.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm.preemption">AMPreemptionPolicy</a>&nbsp;createPreemptionPolicy(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
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<pre>protected&nbsp;boolean&nbsp;keepJobFiles(org.apache.hadoop.mapred.JobConf&nbsp;conf,
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<pre>protected&nbsp;org.apache.hadoop.fs.FileSystem&nbsp;getFileSystem(org.apache.hadoop.conf.Configuration&nbsp;conf)
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<div class="block">Create the default file System for this job.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - the conf object</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the default filesystem for this job</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>
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<div class="block">clean up staging directories for the job.</div>
<dl>
<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>
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<div class="block">create an event handler that handles the job finish event.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the job finish event handler.</dd>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/job/Job.html" title="interface in org.apache.hadoop.mapreduce.v2.app.job">Job</a>&nbsp;createJob(org.apache.hadoop.conf.Configuration&nbsp;conf,
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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;diagnostic)</pre>
<div class="block">Create and initialize (but don't start) a single job.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>forcedState</code> - a state to force the job into or null for normal operation.</dd>
<dd><code>diagnostic</code> - a diagnostic message to include with the job.</dd>
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<pre>protected&nbsp;void&nbsp;initJobCredentialsAndUGI(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
<div class="block">Obtain the tokens needed by the job and put them in the UGI</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - </dd>
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<pre>protected&nbsp;org.apache.hadoop.service.AbstractService&nbsp;createStagingDirCleaningService()</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/speculate/Speculator.html" title="interface in org.apache.hadoop.mapreduce.v2.app.speculate">Speculator</a>&nbsp;createSpeculator(org.apache.hadoop.conf.Configuration&nbsp;conf,
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/TaskAttemptListener.html" title="interface in org.apache.hadoop.mapreduce.v2.app">TaskAttemptListener</a>&nbsp;createTaskAttemptListener(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context,
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/rm/ContainerAllocator.html" title="interface in org.apache.hadoop.mapreduce.v2.app.rm">ContainerAllocator</a>&nbsp;createContainerAllocator(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/client/ClientService.html" title="interface in org.apache.hadoop.mapreduce.v2.app.client">ClientService</a>&nbsp;clientService,
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/launcher/ContainerLauncher.html" title="interface in org.apache.hadoop.mapreduce.v2.app.launcher">ContainerLauncher</a>&nbsp;createContainerLauncher(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</pre>
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<pre>protected&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/client/ClientService.html" title="interface in org.apache.hadoop.mapreduce.v2.app.client">ClientService</a>&nbsp;createClientService(<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/AppContext.html" title="interface in org.apache.hadoop.mapreduce.v2.app">AppContext</a>&nbsp;context)</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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<dt><span class="throwsLabel">Throws:</span></dt>
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<pre>public&nbsp;void&nbsp;stop()</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>stop</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.service.AbstractService</code></dd>
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<pre>protected&nbsp;void&nbsp;startJobs()</pre>
<div class="block">This can be overridden to instantiate multiple jobs and create a
workflow.
TODO: Rework the design to actually support this. Currently much of the
job stuff has been moved to init() above to support uberization (MR-1220).
In a typical workflow, one presumably would want to uberize only a subset
of the jobs (the "small" ones), which is awkward with the current design.</div>
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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;jobUserName)
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<pre>protected&nbsp;void&nbsp;serviceStop()
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>serviceStop</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.service.CompositeService</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
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<pre>public&nbsp;<a href="../../../../../../org/apache/hadoop/mapreduce/v2/app/client/ClientService.html" title="interface in org.apache.hadoop.mapreduce.v2.app.client">ClientService</a>&nbsp;getClientService()</pre>
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