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| <h2 title="Class JvmPauseMonitor" class="title">Class JvmPauseMonitor</h2> |
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| <li>org.apache.hadoop.hbase.util.JvmPauseMonitor</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/util/JvmPauseMonitor.html#line.53">JvmPauseMonitor</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">Class which sets up a simple thread which runs in a loop sleeping |
| for a short interval of time. If the sleep takes significantly longer |
| than its target time, it implies that the JVM or host machine has |
| paused processing, which may cause other problems. If such a pause is |
| detected, the thread logs a message. |
| The original JvmPauseMonitor is: |
| ${hadoop-common-project}/hadoop-common/src/main/java/org/apache/hadoop/util/ |
| JvmPauseMonitor.java |
| r1503806 | cmccabe | 2013-07-17 01:48:24 +0800 (Wed, 17 Jul 2013) | 1 line |
| HADOOP-9618. thread which detects GC pauses(Todd Lipcon)</div> |
| </li> |
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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>private static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.GcTimes.html" title="class in org.apache.hadoop.hbase.util">JvmPauseMonitor.GcTimes</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private class </code></td> |
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| <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 long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#INFO_THRESHOLD_DEFAULT">INFO_THRESHOLD_DEFAULT</a></span></code> </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/hbase/util/JvmPauseMonitor.html#INFO_THRESHOLD_KEY">INFO_THRESHOLD_KEY</a></span></code> </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#infoThresholdMs">infoThresholdMs</a></span></code> |
| <div class="block">log INFO if we detect a pause longer than this threshold</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/metrics/JvmPauseMonitorSource.html" title="interface in org.apache.hadoop.hbase.metrics">JvmPauseMonitorSource</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#metricsSource">metricsSource</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/Thread.html?is-external=true" title="class or interface in java.lang">Thread</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#monitorThread">monitorThread</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/util/JvmPauseMonitor.html#shouldRun">shouldRun</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#SLEEP_INTERVAL_MS">SLEEP_INTERVAL_MS</a></span></code> |
| <div class="block">The target sleep time</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#WARN_THRESHOLD_DEFAULT">WARN_THRESHOLD_DEFAULT</a></span></code> </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/hbase/util/JvmPauseMonitor.html#WARN_THRESHOLD_KEY">WARN_THRESHOLD_KEY</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#warnThresholdMs">warnThresholdMs</a></span></code> |
| <div class="block">log WARN if we detect a pause longer than this threshold</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#JvmPauseMonitor-org.apache.hadoop.conf.Configuration-">JvmPauseMonitor</a></span>(org.apache.hadoop.conf.Configuration conf)</code> </td> |
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| <a href="../../../../../org/apache/hadoop/hbase/metrics/JvmPauseMonitorSource.html" title="interface in org.apache.hadoop.hbase.metrics">JvmPauseMonitorSource</a> metricsSource)</code> </td> |
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| <tr id="i0" class="altColor"> |
| <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/util/JvmPauseMonitor.html#formatMessage-long-java.util.List-">formatMessage</a></span>(long extraSleepTime, |
| <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/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> gcDiffs)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private <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><<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="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.GcTimes.html" title="class in org.apache.hadoop.hbase.util">JvmPauseMonitor.GcTimes</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#getGcTimes--">getGcTimes</a></span>()</code> </td> |
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| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/metrics/JvmPauseMonitorSource.html" title="interface in org.apache.hadoop.hbase.metrics">JvmPauseMonitorSource</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#getMetricsSource--">getMetricsSource</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#main-java.lang.String:A-">main</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>[] args)</code> |
| <div class="block">Simple 'main' to facilitate manual testing of the pause monitor.</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/util/JvmPauseMonitor.html#setMetricsSource-org.apache.hadoop.hbase.metrics.JvmPauseMonitorSource-">setMetricsSource</a></span>(<a href="../../../../../org/apache/hadoop/hbase/metrics/JvmPauseMonitorSource.html" title="interface in org.apache.hadoop.hbase.metrics">JvmPauseMonitorSource</a> metricsSource)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#start--">start</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#stop--">stop</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/util/JvmPauseMonitor.html#updateMetrics-long-boolean-">updateMetrics</a></span>(long sleepTime, |
| boolean gcDetected)</code> </td> |
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| <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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| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/util/JvmPauseMonitor.html#line.54">LOG</a></pre> |
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| <div class="block">The target sleep time</div> |
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| <div class="block">log WARN if we detect a pause longer than this threshold</div> |
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