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https://issues.apache.org/jira/browse/HBASE-15319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15166674#comment-15166674
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Hudson commented on HBASE-15319:
--------------------------------
SUCCESS: Integrated in HBase-1.3-IT #515 (See
[https://builds.apache.org/job/HBase-1.3-IT/515/])
HBASE-15319 clearJmxCache does not take effect actually (eclark: rev
13773254c87994c6cffdb3fbc48521d51c86d8c5)
*
hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/impl/JmxCacheBuster.java
> clearJmxCache does not take effect actually
> -------------------------------------------
>
> Key: HBASE-15319
> URL: https://issues.apache.org/jira/browse/HBASE-15319
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 2.0.0, 1.2.0, 1.1.0.1, 1.3.0
> Reporter: Hao Lin
> Assignee: Elliott Clark
> Labels: easyfix
> Fix For: 2.0.0, 1.3.0, 1.2.1
>
> Attachments: HBASE-15319.patch
>
>
> When trying to backport HBASE-14166 to 0.98.6, I find
> JmxCacheBuster::clearJmxCache() does no take effect actually. The related
> code are listed below:
> {code:title=org.apache.hadoop.metrics2.impl.JmxCacheBuster.java|borderStyle=solid}
> // fut is initialized to null
> private static AtomicReference<ScheduledFuture> fut = new
> AtomicReference<>(null);
> public static void clearJmxCache() {
> // clearJmxCache return directly when fut is null, which is always true.
> // the actual intent is 'if (future != null && !future.isDone ...)' ?
> ScheduledFuture future = fut.get();
> if ((future == null || (!future.isDone() &&
> future.getDelay(TimeUnit.MILLISECONDS) > 100))) {
> return;
> }
> ......
> }
> {code}
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