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<div class="subTitle">org.apache.hadoop.hbase.regionserver.snapshot</div>
<h2 title="Class FlushSnapshotSubprocedure" class="title">Class FlushSnapshotSubprocedure</h2>
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<li><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">org.apache.hadoop.hbase.procedure.Subprocedure</a></li>
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<ul class="inheritance">
<li>org.apache.hadoop.hbase.regionserver.snapshot.FlushSnapshotSubprocedure</li>
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<dt>All Implemented Interfaces:</dt>
<dd><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>&lt;<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>&gt;</dd>
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<pre>@InterfaceAudience.Private
@InterfaceStability.Unstable
public class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.49">FlushSnapshotSubprocedure</a>
extends <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></pre>
<div class="block">This online snapshot implementation uses the distributed procedure framework to force a
store flush and then records the hfiles. Its enter stage does nothing. Its leave stage then
flushes the memstore, builds the region server's snapshot manifest from its hfiles list, and
copies .regioninfos into the snapshot working directory. At the master side, there is an atomic
rename of the working dir into the proper snapshot directory.</div>
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<caption><span>Nested Classes</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">Class and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.RegionSnapshotTask.html" title="class in org.apache.hadoop.hbase.regionserver.snapshot">FlushSnapshotSubprocedure.RegionSnapshotTask</a></span></code>
<div class="block">Callable for adding files to snapshot manifest working dir.</div>
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<h3>Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.hbase.procedure.<a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.SubprocedureImpl.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure.SubprocedureImpl</a></code></li>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<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 static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#LOG">LOG</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#MAX_RETRIES">MAX_RETRIES</a></span></code>&nbsp;</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>&lt;<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#regions">regions</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#snapshot">snapshot</a></span></code>&nbsp;</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/FlushSnapshotSubprocedure.html#snapshotSkipFlush">snapshotSkipFlush</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html" title="class in org.apache.hadoop.hbase.regionserver.snapshot">RegionServerSnapshotManager.SnapshotSubprocedurePool</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#taskManager">taskManager</a></span></code>&nbsp;</td>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.hbase.procedure.<a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#executionTimeoutTimer">executionTimeoutTimer</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#monitor">monitor</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#rpcs">rpcs</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#wakeFrequency">wakeFrequency</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/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#FlushSnapshotSubprocedure-org.apache.hadoop.hbase.procedure.ProcedureMember-org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher-long-long-java.util.List-org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription-org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager.SnapshotSubprocedurePool-">FlushSnapshotSubprocedure</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure/ProcedureMember.html" title="class in org.apache.hadoop.hbase.procedure">ProcedureMember</a>&nbsp;member,
<a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignExceptionDispatcher</a>&nbsp;errorListener,
long&nbsp;wakeFrequency,
long&nbsp;timeout,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;&nbsp;regions,
org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription&nbsp;snapshot,
<a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html" title="class in org.apache.hadoop.hbase.regionserver.snapshot">RegionServerSnapshotManager.SnapshotSubprocedurePool</a>&nbsp;taskManager)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#acquireBarrier--">acquireBarrier</a></span>()</code>
<div class="block">do nothing, core of snapshot is executed in <a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#insideBarrier--"><code>insideBarrier()</code></a> step.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#cleanup-java.lang.Exception-">cleanup</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a>&nbsp;e)</code>
<div class="block">Cancel threads if they haven't finished.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#flushSnapshot--">flushSnapshot</a></span>()</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>byte[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#insideBarrier--">insideBarrier</a></span>()</code>
<div class="block">do a flush snapshot of every region on this rs from the target table.</div>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#releaseBarrier--">releaseBarrier</a></span>()</code>
<div class="block">Hooray!</div>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.hbase.procedure.<a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></h3>
<code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#call--">call</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#cancel-java.lang.String-java.lang.Throwable-">cancel</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#getMemberName--">getMemberName</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#getName--">getName</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#receiveReachedGlobalBarrier--">receiveReachedGlobalBarrier</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#waitForLocallyCompleted--">waitForLocallyCompleted</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>LOG</h4>
<pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.50">LOG</a></pre>
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<h4>regions</h4>
<pre>private final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt; <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.52">regions</a></pre>
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<a name="snapshot">
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<h4>snapshot</h4>
<pre>private final&nbsp;org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.53">snapshot</a></pre>
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<pre>private final&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html" title="class in org.apache.hadoop.hbase.regionserver.snapshot">RegionServerSnapshotManager.SnapshotSubprocedurePool</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.54">taskManager</a></pre>
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<h4>snapshotSkipFlush</h4>
<pre>private&nbsp;boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.55">snapshotSkipFlush</a></pre>
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<a name="MAX_RETRIES">
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<h4>MAX_RETRIES</h4>
<pre>static final&nbsp;int <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.58">MAX_RETRIES</a></pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../constant-values.html#org.apache.hadoop.hbase.regionserver.snapshot.FlushSnapshotSubprocedure.MAX_RETRIES">Constant Field Values</a></dd>
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<h3>Constructor Detail</h3>
<a name="FlushSnapshotSubprocedure-org.apache.hadoop.hbase.procedure.ProcedureMember-org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher-long-long-java.util.List-org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription-org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager.SnapshotSubprocedurePool-">
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<h4>FlushSnapshotSubprocedure</h4>
<pre>public&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.60">FlushSnapshotSubprocedure</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure/ProcedureMember.html" title="class in org.apache.hadoop.hbase.procedure">ProcedureMember</a>&nbsp;member,
<a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignExceptionDispatcher</a>&nbsp;errorListener,
long&nbsp;wakeFrequency,
long&nbsp;timeout,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/regionserver/HRegion.html" title="class in org.apache.hadoop.hbase.regionserver">HRegion</a>&gt;&nbsp;regions,
org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription&nbsp;snapshot,
<a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.SnapshotSubprocedurePool.html" title="class in org.apache.hadoop.hbase.regionserver.snapshot">RegionServerSnapshotManager.SnapshotSubprocedurePool</a>&nbsp;taskManager)</pre>
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<h4>flushSnapshot</h4>
<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.148">flushSnapshot</a>()
throws <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></pre>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<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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<h4>acquireBarrier</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.184">acquireBarrier</a>()
throws <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></pre>
<div class="block">do nothing, core of snapshot is executed in <a href="../../../../../../org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#insideBarrier--"><code>insideBarrier()</code></a> step.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#acquireBarrier--">acquireBarrier</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<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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<h4>insideBarrier</h4>
<pre>public&nbsp;byte[]&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.192">insideBarrier</a>()
throws <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></pre>
<div class="block">do a flush snapshot of every region on this rs from the target table.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#insideBarrier--">insideBarrier</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the data the subprocedure wants to return to coordinator side.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<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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<h4>cleanup</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.201">cleanup</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a>&nbsp;e)</pre>
<div class="block">Cancel threads if they haven't finished.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html#cleanup-java.lang.Exception-">cleanup</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/hadoop/hbase/procedure/Subprocedure.html" title="class in org.apache.hadoop.hbase.procedure">Subprocedure</a></code></dd>
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<h4>releaseBarrier</h4>
<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/snapshot/FlushSnapshotSubprocedure.html#line.214">releaseBarrier</a>()</pre>
<div class="block">Hooray!</div>
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