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<div class="subTitle">org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement</div>
<h2 title="Class SingleConstraintAppPlacementAllocator" class="title">Class SingleConstraintAppPlacementAllocator&lt;N extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</h2>
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<li><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.AppPlacementAllocator</a>&lt;N&gt;</li>
<li>
<ul class="inheritance">
<li>org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.SingleConstraintAppPlacementAllocator&lt;N&gt;</li>
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<pre>public class <span class="typeNameLabel">SingleConstraintAppPlacementAllocator&lt;N extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</span>
extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;N&gt;</pre>
<div class="block">This is a simple implementation to do affinity or anti-affinity for
inter/intra apps.</div>
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<h3>Field Summary</h3>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a></h3>
<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#appSchedulingInfo">appSchedulingInfo</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#rmContext">rmContext</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#schedulerRequestKey">schedulerRequestKey</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/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#SingleConstraintAppPlacementAllocator--">SingleConstraintAppPlacementAllocator</a></span>()</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>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/common/ContainerRequest.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.common">ContainerRequest</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#allocate-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">allocate</a></span>(org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey&nbsp;schedulerKey,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/NodeType.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler">NodeType</a>&nbsp;type,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;node)</code>
<div class="block">Notify container allocated.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#canAllocate-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">canAllocate</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/NodeType.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler">NodeType</a>&nbsp;type,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;node)</code>
<div class="block">We can still have pending requirement for a given NodeType and node</div>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#canDelayTo-java.lang.String-">canDelayTo</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;resourceName)</code>
<div class="block">Can delay to give locality?
TODO: This should be moved out of AppPlacementAllocator
and should belong to specific delay scheduling policy impl.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getOutstandingAsksCount-java.lang.String-">getOutstandingAsksCount</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;resourceName)</code>
<div class="block">Get #pending-allocations for given resourceName.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/common/PendingAsk.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.common">PendingAsk</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getPendingAsk-java.lang.String-">getPendingAsk</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;resourceName)</code>
<div class="block">Get pending ask for given resourceName.</div>
</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getPreferredNodeIterator-org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.CandidateNodeSet-">getPreferredNodeIterator</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/CandidateNodeSet.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">CandidateNodeSet</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a>&gt;&nbsp;candidateNodeSet)</code>
<div class="block">Get iterator of preferred node depends on requirement and/or availability.</div>
</td>
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<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/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getPrimaryRequestedNodePartition--">getPrimaryRequestedNodePartition</a></span>()</code>
<div class="block">It is possible that one request can accept multiple node partition,
So this method returns primary node partition for pending resource /
headroom calculation.</div>
</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.ResourceRequest&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getResourceRequests--">getResourceRequests</a></span>()</code>
<div class="block">Get pending ResourceRequests by given schedulerRequestKey</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>org.apache.hadoop.yarn.api.records.SchedulingRequest</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getSchedulingRequest--">getSchedulingRequest</a></span>()</code>
<div class="block">Get pending SchedulingRequest.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#getUniqueLocationAsks--">getUniqueLocationAsks</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/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#initialize-org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.RMContext-">initialize</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/AppSchedulingInfo.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">AppSchedulingInfo</a>&nbsp;appSchedulingInfo,
org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey&nbsp;schedulerRequestKey,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/RMContext.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">RMContext</a>&nbsp;rmContext)</code>
<div class="block">Initialize this allocator, this will be called by Factory automatically.</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/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#precheckNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.SchedulingMode-">precheckNode</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;schedulerNode,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/SchedulingMode.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity">SchedulingMode</a>&nbsp;schedulingMode)</code>&nbsp;</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#precheckNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.SchedulingMode-java.util.Optional-">precheckNode</a></span>(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;schedulerNode,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/SchedulingMode.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity">SchedulingMode</a>&nbsp;schedulingMode,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/activities/DiagnosticsCollector.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.scheduler.activities">DiagnosticsCollector</a>&gt;&nbsp;dcOpt)</code>
<div class="block">Does this <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement"><code>AppPlacementAllocator</code></a> accept resources on given 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/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#showRequests--">showRequests</a></span>()</code>
<div class="block">Print human-readable requests to LOG debug.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/PendingAskUpdateResult.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">PendingAskUpdateResult</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#updatePendingAsk-java.util.Collection-boolean-">updatePendingAsk</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;org.apache.hadoop.yarn.api.records.ResourceRequest&gt;&nbsp;requests,
boolean&nbsp;recoverPreemptedRequestForAContainer)</code>
<div class="block">Replace existing pending asks by the new requests</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/PendingAskUpdateResult.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">PendingAskUpdateResult</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html#updatePendingAsk-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.api.records.SchedulingRequest-boolean-">updatePendingAsk</a></span>(org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey&nbsp;schedulerRequestKey,
org.apache.hadoop.yarn.api.records.SchedulingRequest&nbsp;newSchedulingRequest,
boolean&nbsp;recoverPreemptedRequestForAContainer)</code>
<div class="block">Replace existing pending asks by the new SchedulingRequest</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a></h3>
<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPlacementAttempt--">getPlacementAttempt</a>, <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#incrementPlacementAttempt--">incrementPlacementAttempt</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<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></h3>
<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>SingleConstraintAppPlacementAllocator</h4>
<pre>public&nbsp;SingleConstraintAppPlacementAllocator()</pre>
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<h3>Method Detail</h3>
<a name="getPreferredNodeIterator-org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.CandidateNodeSet-">
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<h4>getPreferredNodeIterator</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a>&gt;&nbsp;getPreferredNodeIterator(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/CandidateNodeSet.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">CandidateNodeSet</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a>&gt;&nbsp;candidateNodeSet)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPreferredNodeIterator-org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.CandidateNodeSet-">AppPlacementAllocator</a></code></span></div>
<div class="block">Get iterator of preferred node depends on requirement and/or availability.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPreferredNodeIterator-org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.CandidateNodeSet-">getPreferredNodeIterator</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>candidateNodeSet</code> - input CandidateNodeSet</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>iterator of preferred node</dd>
</dl>
</li>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/PendingAskUpdateResult.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">PendingAskUpdateResult</a>&nbsp;updatePendingAsk(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;org.apache.hadoop.yarn.api.records.ResourceRequest&gt;&nbsp;requests,
boolean&nbsp;recoverPreemptedRequestForAContainer)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#updatePendingAsk-java.util.Collection-boolean-">AppPlacementAllocator</a></code></span></div>
<div class="block">Replace existing pending asks by the new requests</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#updatePendingAsk-java.util.Collection-boolean-">updatePendingAsk</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>requests</code> - new asks</dd>
<dd><code>recoverPreemptedRequestForAContainer</code> - if we're recovering resource
requests for preempted container</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if total pending resource changed</dd>
</dl>
</li>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/PendingAskUpdateResult.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">PendingAskUpdateResult</a>&nbsp;updatePendingAsk(org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey&nbsp;schedulerRequestKey,
org.apache.hadoop.yarn.api.records.SchedulingRequest&nbsp;newSchedulingRequest,
boolean&nbsp;recoverPreemptedRequestForAContainer)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#updatePendingAsk-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.api.records.SchedulingRequest-boolean-">AppPlacementAllocator</a></code></span></div>
<div class="block">Replace existing pending asks by the new SchedulingRequest</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#updatePendingAsk-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.api.records.SchedulingRequest-boolean-">updatePendingAsk</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>schedulerRequestKey</code> - scheduler request key</dd>
<dd><code>newSchedulingRequest</code> - new asks</dd>
<dd><code>recoverPreemptedRequestForAContainer</code> - if we're recovering resource
requests for preempted container</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if total pending resource changed</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.ResourceRequest&gt;&nbsp;getResourceRequests()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getResourceRequests--">AppPlacementAllocator</a></code></span></div>
<div class="block">Get pending ResourceRequests by given schedulerRequestKey</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getResourceRequests--">getResourceRequests</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Map of resourceName to ResourceRequest</dd>
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<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/common/PendingAsk.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.common">PendingAsk</a>&nbsp;getPendingAsk(<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;resourceName)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPendingAsk-java.lang.String-">AppPlacementAllocator</a></code></span></div>
<div class="block">Get pending ask for given resourceName. If there's no such pendingAsk,
returns <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/common/PendingAsk.html#ZERO"><code>PendingAsk.ZERO</code></a></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPendingAsk-java.lang.String-">getPendingAsk</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>resourceName</code> - resourceName</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>PendingAsk</dd>
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<pre>public&nbsp;int&nbsp;getOutstandingAsksCount(<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;resourceName)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getOutstandingAsksCount-java.lang.String-">AppPlacementAllocator</a></code></span></div>
<div class="block">Get #pending-allocations for given resourceName. If there's no such
pendingAsk, returns 0</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getOutstandingAsksCount-java.lang.String-">getOutstandingAsksCount</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>resourceName</code> - resourceName</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>#pending-allocations</dd>
</dl>
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</ul>
<a name="allocate-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">
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<h4>allocate</h4>
<pre>public&nbsp;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/common/ContainerRequest.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.common">ContainerRequest</a>&nbsp;allocate(org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey&nbsp;schedulerKey,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/NodeType.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler">NodeType</a>&nbsp;type,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;node)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#allocate-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">AppPlacementAllocator</a></code></span></div>
<div class="block">Notify container allocated.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#allocate-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">allocate</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>schedulerKey</code> - SchedulerRequestKey for this ResourceRequest</dd>
<dd><code>type</code> - Type of the allocation</dd>
<dd><code>node</code> - Which node this container allocated on</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>ContainerRequest which include resource requests associated with
the container. This will be used by scheduler to recover requests.
Please refer to <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/common/ContainerRequest.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.common"><code>ContainerRequest</code></a> for more details.</dd>
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<h4>canAllocate</h4>
<pre>public&nbsp;boolean&nbsp;canAllocate(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/NodeType.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler">NodeType</a>&nbsp;type,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;node)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#canAllocate-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">AppPlacementAllocator</a></code></span></div>
<div class="block">We can still have pending requirement for a given NodeType and node</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#canAllocate-org.apache.hadoop.yarn.server.resourcemanager.scheduler.NodeType-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-">canAllocate</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>type</code> - Locality Type</dd>
<dd><code>node</code> - which node we will allocate on</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if we has pending requirement</dd>
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<pre>public&nbsp;boolean&nbsp;canDelayTo(<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;resourceName)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#canDelayTo-java.lang.String-">AppPlacementAllocator</a></code></span></div>
<div class="block">Can delay to give locality?
TODO: This should be moved out of AppPlacementAllocator
and should belong to specific delay scheduling policy impl.
See YARN-7457 for more details.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#canDelayTo-java.lang.String-">canDelayTo</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>resourceName</code> - resourceName</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>can/cannot</dd>
</dl>
</li>
</ul>
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<h4>precheckNode</h4>
<pre>public&nbsp;boolean&nbsp;precheckNode(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;schedulerNode,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/SchedulingMode.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity">SchedulingMode</a>&nbsp;schedulingMode)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#precheckNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.SchedulingMode-">precheckNode</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
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</ul>
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<h4>precheckNode</h4>
<pre>public&nbsp;boolean&nbsp;precheckNode(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&nbsp;schedulerNode,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/SchedulingMode.html" title="enum in org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity">SchedulingMode</a>&nbsp;schedulingMode,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/activities/DiagnosticsCollector.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager.scheduler.activities">DiagnosticsCollector</a>&gt;&nbsp;dcOpt)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#precheckNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.SchedulingMode-java.util.Optional-">AppPlacementAllocator</a></code></span></div>
<div class="block">Does this <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement"><code>AppPlacementAllocator</code></a> accept resources on given node?</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#precheckNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode-org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.SchedulingMode-java.util.Optional-">precheckNode</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>schedulerNode</code> - schedulerNode</dd>
<dd><code>schedulingMode</code> - schedulingMode</dd>
<dd><code>dcOpt</code> - optional diagnostics collector</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>accepted/not</dd>
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<a name="getPrimaryRequestedNodePartition--">
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<h4>getPrimaryRequestedNodePartition</h4>
<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;getPrimaryRequestedNodePartition()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPrimaryRequestedNodePartition--">AppPlacementAllocator</a></code></span></div>
<div class="block">It is possible that one request can accept multiple node partition,
So this method returns primary node partition for pending resource /
headroom calculation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getPrimaryRequestedNodePartition--">getPrimaryRequestedNodePartition</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>primary requested node partition</dd>
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<a name="getUniqueLocationAsks--">
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<h4>getUniqueLocationAsks</h4>
<pre>public&nbsp;int&nbsp;getUniqueLocationAsks()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getUniqueLocationAsks--">getUniqueLocationAsks</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of unique location asks with #pending greater than 0,
(like /rack1, host1, etc.).
TODO: This should be moved out of AppPlacementAllocator
and should belong to specific delay scheduling policy impl.
See YARN-7457 for more details.</dd>
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<h4>showRequests</h4>
<pre>public&nbsp;void&nbsp;showRequests()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#showRequests--">AppPlacementAllocator</a></code></span></div>
<div class="block">Print human-readable requests to LOG debug.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#showRequests--">showRequests</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
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<h4>getSchedulingRequest</h4>
<pre>public&nbsp;org.apache.hadoop.yarn.api.records.SchedulingRequest&nbsp;getSchedulingRequest()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getSchedulingRequest--">AppPlacementAllocator</a></code></span></div>
<div class="block">Get pending SchedulingRequest.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#getSchedulingRequest--">getSchedulingRequest</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>SchedulingRequest</dd>
</dl>
</li>
</ul>
<a name="initialize-org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.RMContext-">
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<h4>initialize</h4>
<pre>public&nbsp;void&nbsp;initialize(<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/AppSchedulingInfo.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">AppSchedulingInfo</a>&nbsp;appSchedulingInfo,
org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey&nbsp;schedulerRequestKey,
<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/RMContext.html" title="interface in org.apache.hadoop.yarn.server.resourcemanager">RMContext</a>&nbsp;rmContext)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#initialize-org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.RMContext-">AppPlacementAllocator</a></code></span></div>
<div class="block">Initialize this allocator, this will be called by Factory automatically.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html#initialize-org.apache.hadoop.yarn.server.resourcemanager.scheduler.AppSchedulingInfo-org.apache.hadoop.yarn.server.scheduler.SchedulerRequestKey-org.apache.hadoop.yarn.server.resourcemanager.RMContext-">initialize</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/AppPlacementAllocator.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement">AppPlacementAllocator</a>&lt;<a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/placement/SingleConstraintAppPlacementAllocator.html" title="type parameter in SingleConstraintAppPlacementAllocator">N</a> extends <a href="../../../../../../../../org/apache/hadoop/yarn/server/resourcemanager/scheduler/SchedulerNode.html" title="class in org.apache.hadoop.yarn.server.resourcemanager.scheduler">SchedulerNode</a>&gt;</code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>appSchedulingInfo</code> - appSchedulingInfo</dd>
<dd><code>schedulerRequestKey</code> - schedulerRequestKey</dd>
<dd><code>rmContext</code> - rmContext</dd>
</dl>
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