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| <div class="subTitle">org.apache.hadoop.hbase.regionserver.wal</div> |
| <h2 title="Class FSHLog.SyncRunner" class="title">Class FSHLog.SyncRunner</h2> |
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| <li>org.apache.hadoop.hbase.regionserver.wal.FSHLog.SyncRunner</li> |
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| <dd><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.html" title="class in org.apache.hadoop.hbase.regionserver.wal">FSHLog</a></dd> |
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| <pre>private class <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.html#line.518">FSHLog.SyncRunner</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Thread.html?is-external=true" title="class or interface in java.lang">Thread</a></pre> |
| <div class="block">Thread to runs the hdfs sync call. This call takes a while to complete. This is the longest |
| pole adding edits to the WAL and this must complete to be sure all edits persisted. We run |
| multiple threads sync'ng rather than one that just syncs in series so we have better latencies; |
| otherwise, an edit that arrived just after a sync started, might have to wait almost the length |
| of two sync invocations before it is marked done. |
| <p> |
| When the sync completes, it marks all the passed in futures done. On the other end of the sync |
| future is a blocked thread, usually a regionserver Handler. There may be more than one future |
| passed in the case where a few threads arrive at about the same time and all invoke 'sync'. In |
| this case we'll batch up the invocations and run one filesystem sync only for a batch of |
| Handler sync invocations. Do not confuse these Handler SyncFutures with the futures an |
| ExecutorService returns when you call submit. We have no use for these in this model. These |
| SyncFutures are 'artificial', something to hold the Handler until the filesystem sync |
| completes.</div> |
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| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#sequence">sequence</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/BlockingQueue.html?is-external=true" title="class or interface in java.util.concurrent">BlockingQueue</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#syncFutures">syncFutures</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#takeSyncFuture">takeSyncFuture</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/wal/FSHLog.SyncRunner.html#SyncRunner-java.lang.String-int-">SyncRunner</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, |
| int maxHandlersCount)</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <td class="colFirst"><code>(package private) boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#areSyncFuturesReleased--">areSyncFuturesReleased</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" 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/wal/FSHLog.SyncRunner.html#offer-long-org.apache.hadoop.hbase.regionserver.wal.SyncFuture:A-int-">offer</a></span>(long sequence, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>[] syncFutures, |
| int syncFutureCount)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#releaseSyncFuture-org.apache.hadoop.hbase.regionserver.wal.SyncFuture-long-java.lang.Throwable-">releaseSyncFuture</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> syncFuture, |
| long currentSequence, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> t)</code> |
| <div class="block">Release the passed <code>syncFuture</code></div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>private int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#releaseSyncFutures-long-java.lang.Throwable-">releaseSyncFutures</a></span>(long currentSequence, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> t)</code> |
| <div class="block">Release all SyncFutures whose sequence is <= <code>currentSequence</code>.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#run--">run</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#updateHighestSyncedSequence-long-">updateHighestSyncedSequence</a></span>(long sequence)</code> </td> |
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| <code><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#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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| <a name="sequence"> |
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| <h4>sequence</h4> |
| <pre>private volatile long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.519">sequence</a></pre> |
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| <a name="syncFutures"> |
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| <h4>syncFutures</h4> |
| <pre>private final <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/BlockingQueue.html?is-external=true" title="class or interface in java.util.concurrent">BlockingQueue</a><<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.521">syncFutures</a></pre> |
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| <a name="takeSyncFuture"> |
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| <h4>takeSyncFuture</h4> |
| <pre>private volatile <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.522">takeSyncFuture</a></pre> |
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| <h3>Constructor Detail</h3> |
| <a name="SyncRunner-java.lang.String-int-"> |
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| <h4>SyncRunner</h4> |
| <pre><a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.524">SyncRunner</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, |
| int maxHandlersCount)</pre> |
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| <a name="offer-long-org.apache.hadoop.hbase.regionserver.wal.SyncFuture:A-int-"> |
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| <h4>offer</h4> |
| <pre>void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.542">offer</a>(long sequence, |
| <a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a>[] syncFutures, |
| int syncFutureCount)</pre> |
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| <a name="releaseSyncFuture-org.apache.hadoop.hbase.regionserver.wal.SyncFuture-long-java.lang.Throwable-"> |
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| <h4>releaseSyncFuture</h4> |
| <pre>private int <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.554">releaseSyncFuture</a>(<a href="../../../../../../org/apache/hadoop/hbase/regionserver/wal/SyncFuture.html" title="class in org.apache.hadoop.hbase.regionserver.wal">SyncFuture</a> syncFuture, |
| long currentSequence, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> t)</pre> |
| <div class="block">Release the passed <code>syncFuture</code></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Returns 1.</dd> |
| </dl> |
| </li> |
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| <a name="releaseSyncFutures-long-java.lang.Throwable-"> |
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| <h4>releaseSyncFutures</h4> |
| <pre>private int <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.569">releaseSyncFutures</a>(long currentSequence, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Throwable.html?is-external=true" title="class or interface in java.lang">Throwable</a> t)</pre> |
| <div class="block">Release all SyncFutures whose sequence is <= <code>currentSequence</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>t</code> - May be non-null if we are processing SyncFutures because an exception was thrown.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Count of SyncFutures we let go.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>updateHighestSyncedSequence</h4> |
| <pre>private long <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.588">updateHighestSyncedSequence</a>(long sequence)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sequence</code> - The sequence we ran the filesystem sync against.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Current highest synced sequence.</dd> |
| </dl> |
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| <h4>areSyncFuturesReleased</h4> |
| <pre>boolean <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.603">areSyncFuturesReleased</a>()</pre> |
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| <a name="run--"> |
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| <h4>run</h4> |
| <pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/regionserver/wal/FSHLog.SyncRunner.html#line.611">run</a>()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true#run--" title="class or interface in java.lang">run</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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