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<div class="subTitle">org.apache.hadoop.mapred</div>
<h2 title="Class ShuffleHandler" class="title">Class ShuffleHandler</h2>
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<li>org.apache.hadoop.service.AbstractService</li>
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<li>org.apache.hadoop.yarn.server.api.AuxiliaryService</li>
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<li>org.apache.hadoop.mapred.ShuffleHandler</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">ShuffleHandler</span>
extends org.apache.hadoop.yarn.server.api.AuxiliaryService</pre>
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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>
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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>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#CONCURRENCY_LEVEL">CONCURRENCY_LEVEL</a></span></code>&nbsp;</td>
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<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/mapred/ShuffleHandler.html#CONNECTION_CLOSE">CONNECTION_CLOSE</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>protected static org.apache.hadoop.yarn.server.records.Version</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#CURRENT_VERSION_INFO">CURRENT_VERSION_INFO</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_CONCURRENCY_LEVEL">DEFAULT_CONCURRENCY_LEVEL</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_EXPIRE_AFTER_ACCESS_MINUTES">DEFAULT_EXPIRE_AFTER_ACCESS_MINUTES</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_MAX_SHUFFLE_CONNECTIONS">DEFAULT_MAX_SHUFFLE_CONNECTIONS</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_MAX_SHUFFLE_THREADS">DEFAULT_MAX_SHUFFLE_THREADS</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_MAX_WEIGHT">DEFAULT_MAX_WEIGHT</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_BUFFER_SIZE">DEFAULT_SHUFFLE_BUFFER_SIZE</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED">DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT">DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT</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/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_LISTEN_QUEUE_SIZE">DEFAULT_SHUFFLE_LISTEN_QUEUE_SIZE</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_MANAGE_OS_CACHE">DEFAULT_SHUFFLE_MANAGE_OS_CACHE</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE">DEFAULT_SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_MAX_SESSION_OPEN_FILES">DEFAULT_SHUFFLE_MAX_SESSION_OPEN_FILES</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_PORT">DEFAULT_SHUFFLE_PORT</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_READAHEAD_BYTES">DEFAULT_SHUFFLE_READAHEAD_BYTES</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SHUFFLE_TRANSFERTO_ALLOWED">DEFAULT_SHUFFLE_TRANSFERTO_ALLOWED</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#DEFAULT_SUFFLE_SSL_FILE_BUFFER_SIZE">DEFAULT_SUFFLE_SSL_FILE_BUFFER_SIZE</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/mapred/ShuffleHandler.html#EXPIRE_AFTER_ACCESS_MINUTES">EXPIRE_AFTER_ACCESS_MINUTES</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#FETCH_RETRY_DELAY">FETCH_RETRY_DELAY</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/mapred/ShuffleHandler.html#MAPREDUCE_SHUFFLE_SERVICEID">MAPREDUCE_SHUFFLE_SERVICEID</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<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/mapred/ShuffleHandler.html#MAX_SHUFFLE_CONNECTIONS">MAX_SHUFFLE_CONNECTIONS</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/mapred/ShuffleHandler.html#MAX_SHUFFLE_THREADS">MAX_SHUFFLE_THREADS</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#MAX_WEIGHT">MAX_WEIGHT</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.mapred.ShuffleHandler.HttpPipelineFactory</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#pipelineFact">pipelineFact</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#RETRY_AFTER_HEADER">RETRY_AFTER_HEADER</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/mapred/ShuffleHandler.html#SHUFFLE_BUFFER_SIZE">SHUFFLE_BUFFER_SIZE</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED">SHUFFLE_CONNECTION_KEEP_ALIVE_ENABLED</a></span></code>&nbsp;</td>
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<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/mapred/ShuffleHandler.html#SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT">SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#SHUFFLE_LISTEN_QUEUE_SIZE">SHUFFLE_LISTEN_QUEUE_SIZE</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/mapred/ShuffleHandler.html#SHUFFLE_MANAGE_OS_CACHE">SHUFFLE_MANAGE_OS_CACHE</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE">SHUFFLE_MAPOUTPUT_META_INFO_CACHE_SIZE</a></span></code>&nbsp;</td>
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<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/mapred/ShuffleHandler.html#SHUFFLE_MAX_SESSION_OPEN_FILES">SHUFFLE_MAX_SESSION_OPEN_FILES</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#SHUFFLE_PORT_CONFIG_KEY">SHUFFLE_PORT_CONFIG_KEY</a></span></code>&nbsp;</td>
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<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/mapred/ShuffleHandler.html#SHUFFLE_READAHEAD_BYTES">SHUFFLE_READAHEAD_BYTES</a></span></code>&nbsp;</td>
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<tr class="altColor">
<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/mapred/ShuffleHandler.html#SHUFFLE_TRANSFERTO_ALLOWED">SHUFFLE_TRANSFERTO_ALLOWED</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/mapred/ShuffleHandler.html#SUFFLE_SSL_FILE_BUFFER_SIZE_KEY">SUFFLE_SSL_FILE_BUFFER_SIZE_KEY</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static org.jboss.netty.handler.codec.http.HttpResponseStatus</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#TOO_MANY_REQ_STATUS">TOO_MANY_REQ_STATUS</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#WINDOWS_DEFAULT_SHUFFLE_TRANSFERTO_ALLOWED">WINDOWS_DEFAULT_SHUFFLE_TRANSFERTO_ALLOWED</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/hadoop/mapred/ShuffleHandler.html#ShuffleHandler--">ShuffleHandler</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="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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<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#deserializeMetaData-java.nio.ByteBuffer-">deserializeMetaData</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;meta)</code>
<div class="block">A helper function to deserialize the metadata returned by ShuffleHandler.</div>
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</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.yarn.server.records.Version</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/mapred/ShuffleHandler.html#getCurrentVersion--">getCurrentVersion</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a></code></td>
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<td class="colFirst"><code>protected org.apache.hadoop.mapred.ShuffleHandler.Shuffle</code></td>
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<td class="colFirst"><code>void</code></td>
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<td class="colFirst"><code>void</code></td>
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<pre>public static final&nbsp;int DEFAULT_SHUFFLE_CONNECTION_KEEP_ALIVE_TIME_OUT</pre>
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<pre>public static final&nbsp;int DEFAULT_MAX_SHUFFLE_CONNECTIONS</pre>
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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> MAX_SHUFFLE_THREADS</pre>
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<pre>public static final&nbsp;int DEFAULT_MAX_SHUFFLE_THREADS</pre>
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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> SHUFFLE_BUFFER_SIZE</pre>
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<pre>public static final&nbsp;int DEFAULT_SHUFFLE_BUFFER_SIZE</pre>
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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> SHUFFLE_TRANSFERTO_ALLOWED</pre>
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<pre>public static final&nbsp;boolean DEFAULT_SHUFFLE_TRANSFERTO_ALLOWED</pre>
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<pre>public static final&nbsp;boolean WINDOWS_DEFAULT_SHUFFLE_TRANSFERTO_ALLOWED</pre>
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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> SHUFFLE_MAX_SESSION_OPEN_FILES</pre>
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<pre>public static final&nbsp;int DEFAULT_SHUFFLE_MAX_SESSION_OPEN_FILES</pre>
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<pre>public&nbsp;ShuffleHandler()</pre>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;serializeMetaData(int&nbsp;port)
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<div class="block">Serialize the shuffle port into a ByteBuffer for use later on.</div>
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<dd><code>port</code> - the port to be sent to the ApplciationMaster</dd>
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<div class="block">A helper function to deserialize the metadata returned by ShuffleHandler.</div>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;serializeServiceData(org.apache.hadoop.security.token.Token&lt;org.apache.hadoop.mapreduce.security.token.JobTokenIdentifier&gt;&nbsp;jobToken)
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<div class="block">A helper function to serialize the JobTokenIdentifier to be sent to the
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<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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<pre>public&nbsp;void&nbsp;initializeApplication(org.apache.hadoop.yarn.server.api.ApplicationInitializationContext&nbsp;context)</pre>
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<pre>public&nbsp;void&nbsp;stopApplication(org.apache.hadoop.yarn.server.api.ApplicationTerminationContext&nbsp;context)</pre>
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<pre>protected&nbsp;void&nbsp;serviceStop()
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html?is-external=true" title="class or interface in java.nio">ByteBuffer</a>&nbsp;getMetaData()</pre>
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<pre>protected&nbsp;org.apache.hadoop.mapred.ShuffleHandler.Shuffle&nbsp;getShuffle(org.apache.hadoop.conf.Configuration&nbsp;conf)</pre>
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<pre>protected&nbsp;org.apache.hadoop.yarn.server.records.Version&nbsp;getCurrentVersion()</pre>
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