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<div class="subTitle">org.apache.drill.yarn.appMaster</div>
<h2 title="Class TaskState" class="title">Class TaskState</h2>
</div>
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<li>org.apache.drill.yarn.appMaster.TaskState</li>
</ul>
</li>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.EndingState.html" title="class in org.apache.drill.yarn.appMaster">TaskState.EndingState</a>, <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.KillingState.html" title="class in org.apache.drill.yarn.appMaster">TaskState.KillingState</a></dd>
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<pre>public abstract class <span class="typeNameLabel">TaskState</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">Represents the behaviors associated with each state in the lifecycle
of a task.
<p>
Startup process:
<dl>
<dt>START --> REQUESTING<dt>
<dd>New task sends a container request to YARN.</dd>
<dt>REQUESTING --> LAUNCHING<dt>
<dd>Container received from YARN, launching the tasks's process.</dd>
<dt>LAUNCHING --> RUNNING<dt>
<dd>Task launched and needs no start Ack.</dd>
<dt>LAUNCHING --> WAIT_START_ACK<dt>
<dd>Task launched and needs a start Ack.</dd>
<dt>WAIT_START_ACK --> RUNNING<dt>
<dd>Start Ack received.</dd>
</dl>
<p>
Shutdown process:
<dt>RUNNING --> WAIT_END_ACK | END<dt>
<dd>The resource manager reported task completion.</dd>
<dt>RUNNING --> ENDING<dt>
<dd>Request sent to the task for a graceful shutdown.</dd>
<dt>RUNNING --> KILLING<dt>
<dd>Request sent to the node manager to forcibly kill the task.</dd>
<dt>ENDING --> WAIT_END_ACK | END<dt>
<dd>The task gracefully exited as reported by the resource manager.</dd>
<dt>ENDING --> KILLING<dt>
<dd>The wait for graceful exit timed out, a forced kill message
sent to the node manager.</dd>
<dt>KILLING --> WAIT_END_ACK | END<dt>
<dd>The task exited as reported by the resource manager.</dd>
<dt>END_ACK --> END<dt>
<dd>The end-ack is received or the wait timed out.</dd>
<dl>
<p>
This is a do-it-yourself enum. Java enums values are instances of a single
class. In this version, each enum value is the sole instance of a separate
class, allowing each state to have its own behavior.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.EndingState.html" title="class in org.apache.drill.yarn.appMaster">TaskState.EndingState</a></span></code>
<div class="block">Task for which a termination request has been sent to the Drill-bit, but
confirmation has not yet been received from the Node Manager.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.KillingState.html" title="class in org.apache.drill.yarn.appMaster">TaskState.KillingState</a></span></code>
<div class="block">Task for which a forced termination request has been sent to the Node
Manager, but a stop message has not yet been received.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#cancellable">cancellable</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#END">END</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#ENDING">ENDING</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#hasContainer">hasContainer</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#KILLING">KILLING</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<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/drill/yarn/appMaster/TaskState.html#label">label</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#LAUNCHING">LAUNCHING</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../org/apache/drill/yarn/appMaster/TaskLifecycleListener.Event.html" title="enum in org.apache.drill.yarn.appMaster">TaskLifecycleListener.Event</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#lifeCycleEvent">lifeCycleEvent</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#REQUESTING">REQUESTING</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#RUNNING">RUNNING</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#START">START</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#WAIT_END_ACK">WAIT_END_ACK</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html" title="class in org.apache.drill.yarn.appMaster">TaskState</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#WAIT_START_ACK">WAIT_START_ACK</a></span></code>&nbsp;</td>
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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/drill/yarn/appMaster/TaskState.html#TaskState-boolean-org.apache.drill.yarn.appMaster.TaskLifecycleListener.Event-boolean-">TaskState</a></span>(boolean&nbsp;hasContainer,
<a href="../../../../../org/apache/drill/yarn/appMaster/TaskLifecycleListener.Event.html" title="enum in org.apache.drill.yarn.appMaster">TaskLifecycleListener.Event</a>&nbsp;lcEvent,
boolean&nbsp;cancellable)</code>&nbsp;</td>
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<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>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#cancel-org.apache.drill.yarn.appMaster.EventContext-">cancel</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>
<div class="block">Cluster manager wishes to cancel this task.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#completed-org.apache.drill.yarn.appMaster.EventContext-org.apache.hadoop.yarn.api.records.ContainerStatus-">completed</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
org.apache.hadoop.yarn.api.records.ContainerStatus&nbsp;status)</code>&nbsp;</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/drill/yarn/appMaster/TaskState.html#completionAck-org.apache.drill.yarn.appMaster.EventContext-">completionAck</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>
<div class="block">The monitoring plugin has detected that the task has confirmed that it has
started shutdown.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#containerAllocated-org.apache.drill.yarn.appMaster.EventContext-org.apache.hadoop.yarn.api.records.Container-">containerAllocated</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
org.apache.hadoop.yarn.api.records.Container&nbsp;container)</code>
<div class="block">Resource Manager reports that the task has been allocated a container.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#containerCompleted-org.apache.drill.yarn.appMaster.EventContext-org.apache.hadoop.yarn.api.records.ContainerStatus-">containerCompleted</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
org.apache.hadoop.yarn.api.records.ContainerStatus&nbsp;status)</code>
<div class="block">Resource Manager reports that the task has completed execution and provided
the completion status.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#containerStarted-org.apache.drill.yarn.appMaster.EventContext-">containerStarted</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>
<div class="block">Node Manager reports that the task has started execution.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#containerStopped-org.apache.drill.yarn.appMaster.EventContext-">containerStopped</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>
<div class="block">Node Manager reports that the task has stopped execution.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#endOrAck-org.apache.drill.yarn.appMaster.EventContext-">endOrAck</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>&nbsp;</td>
</tr>
<tr id="i8" 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/drill/yarn/appMaster/TaskState.html#getLabel--">getLabel</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#hasContainer--">hasContainer</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#isCancellable--">isCancellable</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#launchFailed-org.apache.drill.yarn.appMaster.EventContext-java.lang.Throwable-">launchFailed</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a>&nbsp;t)</code>
<div class="block">The launch of the container failed.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#requestContainer-org.apache.drill.yarn.appMaster.EventContext-">requestContainer</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>&nbsp;</td>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#startAck-org.apache.drill.yarn.appMaster.EventContext-">startAck</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context)</code>
<div class="block">The monitoring plugin has detected that the task has confirmed that it is
fully started.</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/drill/yarn/appMaster/TaskState.html#stopTaskFailed-org.apache.drill.yarn.appMaster.EventContext-java.lang.Throwable-">stopTaskFailed</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a>&nbsp;t)</code>
<div class="block">The node manager request to stop a task failed.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#taskStartFailed-org.apache.drill.yarn.appMaster.EventContext-org.apache.drill.yarn.appMaster.Task.Disposition-">taskStartFailed</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
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<td class="colFirst"><code>protected void</code></td>
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<td class="colFirst"><code>void</code></td>
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<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/drill/yarn/appMaster/TaskState.html#toString--">toString</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/yarn/appMaster/TaskState.html#transition-org.apache.drill.yarn.appMaster.EventContext-org.apache.drill.yarn.appMaster.TaskState-">transition</a></span>(<a href="../../../../../org/apache/drill/yarn/appMaster/EventContext.html" title="class in org.apache.drill.yarn.appMaster">EventContext</a>&nbsp;context,
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<div class="block">Resource Manager reports that the task has been allocated a container.</div>
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<div class="block">The launch of the container failed.</div>
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<dd><code>context</code> - </dd>
<dd><code>t</code> - </dd>
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<div class="block">Node Manager reports that the task has started execution.</div>
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<div class="block">The monitoring plugin has detected that the task has confirmed that it is
fully started.</div>
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<div class="block">The node manager request to stop a task failed.</div>
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<dd><code>t</code> - </dd>
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<div class="block">The monitoring plugin has detected that the task has confirmed that it has
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<div class="block">Node Manager reports that the task has stopped execution. We don't yet know
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>context</code> - </dd>
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<dd><code>status</code> - </dd>
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<div class="block">Implement a state transition, alerting any life cycle listeners and
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If the run failed, and the task can be retried, it may
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<dd><code>disposition</code> - </dd>
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