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| <div class="subTitle">org.apache.hadoop.hbase.regionserver.snapshot</div> |
| <h2 title="Class RegionServerSnapshotManager.SnapshotSubprocedurePool" class="title">Class RegionServerSnapshotManager.SnapshotSubprocedurePool</h2> |
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| <li>org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager.SnapshotSubprocedurePool</li> |
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| <dd><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.html" title="class in org.apache.hadoop.hbase.regionserver.snapshot">RegionServerSnapshotManager</a></dd> |
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| <br> |
| <pre>static class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.html#line.270">RegionServerSnapshotManager.SnapshotSubprocedurePool</a> |
| 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">We use the SnapshotSubprocedurePool, a class specific thread pool instead of |
| <a href="../../../../../../org/apache/hadoop/hbase/executor/ExecutorService.html" title="class in org.apache.hadoop.hbase.executor"><code>ExecutorService</code></a>. |
| |
| It uses a <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorCompletionService.html?is-external=true" title="class or interface in java.util.concurrent"><code>ExecutorCompletionService</code></a> which provides queuing of |
| completed tasks which lets us efficiently cancel pending tasks upon the earliest operation |
| failures. |
| |
| HBase's ExecutorService (different from <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><code>ExecutorService</code></a>) isn't |
| really built for coordinated tasks where multiple threads as part of one larger task. In |
| RS's the HBase Executor services are only used for open and close and not other threadpooled |
| operations such as compactions and replication sinks.</div> |
| </li> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#abortable">abortable</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#executor">executor</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#futures">futures</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <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/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#name">name</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#stopped">stopped</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorCompletionService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorCompletionService</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#taskPool">taskPool</a></span></code> </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/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#SnapshotSubprocedurePool-java.lang.String-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.Abortable-">SnapshotSubprocedurePool</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> name, |
| org.apache.hadoop.conf.Configuration conf, |
| <a href="../../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> abortable)</code> </td> |
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| <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>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#cancelTasks--">cancelTasks</a></span>()</code> |
| <div class="block">This attempts to cancel out all pending and in progress tasks (interruptions issues)</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>(package private) boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#hasTasks--">hasTasks</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#stop--">stop</a></span>()</code> |
| <div class="block">Abruptly shutdown the thread pool.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>(package private) void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#submitTask-java.util.concurrent.Callable-">submitTask</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent">Callable</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>> task)</code> |
| <div class="block">Submit a task to the pool.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>(package private) boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#waitForOutstandingTasks--">waitForOutstandingTasks</a></span>()</code> |
| <div class="block">Wait for all of the currently outstanding tasks submitted via <a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#submitTask-java.util.concurrent.Callable-"><code>submitTask(Callable)</code></a>.</div> |
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| </ul> |
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| <a name="abortable"> |
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| <h4>abortable</h4> |
| <pre>private final <a href="../../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.271">abortable</a></pre> |
| </li> |
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| <a name="taskPool"> |
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| <h4>taskPool</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorCompletionService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorCompletionService</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.272">taskPool</a></pre> |
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| <h4>executor</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.273">executor</a></pre> |
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| <h4>stopped</h4> |
| <pre>private volatile boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.274">stopped</a></pre> |
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| <h4>futures</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.275">futures</a></pre> |
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| <h4>name</h4> |
| <pre>private final <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> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.276">name</a></pre> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="SnapshotSubprocedurePool-java.lang.String-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.Abortable-"> |
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| <h4>SnapshotSubprocedurePool</h4> |
| <pre><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.278">SnapshotSubprocedurePool</a>(<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> name, |
| org.apache.hadoop.conf.Configuration conf, |
| <a href="../../../../../../org/apache/hadoop/hbase/Abortable.html" title="interface in org.apache.hadoop.hbase">Abortable</a> abortable)</pre> |
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| <h4>hasTasks</h4> |
| <pre>boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.292">hasTasks</a>()</pre> |
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| <h4>submitTask</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.302">submitTask</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Callable.html?is-external=true" title="class or interface in java.util.concurrent">Callable</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html?is-external=true" title="class or interface in java.lang">Void</a>> task)</pre> |
| <div class="block">Submit a task to the pool. |
| |
| NOTE: all must be submitted before you can safely <a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#waitForOutstandingTasks--"><code>waitForOutstandingTasks()</code></a>. This |
| version does not support issuing tasks from multiple concurrent table snapshots requests.</div> |
| </li> |
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| <a name="waitForOutstandingTasks--"> |
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| </a> |
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| <h4>waitForOutstandingTasks</h4> |
| <pre>boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.315">waitForOutstandingTasks</a>() |
| throws <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a>, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre> |
| <div class="block">Wait for all of the currently outstanding tasks submitted via <a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#submitTask-java.util.concurrent.Callable-"><code>submitTask(Callable)</code></a>. |
| This *must* be called after all tasks are submitted via submitTask.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><tt>true</tt> on success, <tt>false</tt> otherwise</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/snapshot/SnapshotCreationException.html" title="class in org.apache.hadoop.hbase.snapshot">SnapshotCreationException</a></code> - if the snapshot failed while we were waiting</dd> |
| <dd><code><a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></code></dd> |
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| <a name="cancelTasks--"> |
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| <h4>cancelTasks</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.359">cancelTasks</a>() |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></pre> |
| <div class="block">This attempts to cancel out all pending and in progress tasks (interruptions issues)</div> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</a></code></dd> |
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| <h4>stop</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html#line.379">stop</a>()</pre> |
| <div class="block">Abruptly shutdown the thread pool. Call when exiting a region server.</div> |
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