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https://issues.apache.org/jira/browse/HBASE-11501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14058212#comment-14058212
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Virag Kothari commented on HBASE-11501:
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Without the fix, the JmxCacheBusterRunnable is never called and metrics are not
removed from cache. With the fix, the metrics will be removed as the runnable
will run and will stop the metrics system
(DefaultMetricsSystem.instance().stop()). However when it tries to start the
metrics system ( DefaultMetricsSystem.instance().start()), it cant register the
mbeans with the same name as before due to Hadoop-9559. This will cause the
metrics system to even stop publishing metrics.
So, running on hadoop 2.4 with this fix will do more harm than good. So either
it should go with hadoop 2.5 or if Hadoop-9559 is backported to 2.4 (and other
versions if required), then I believe this patch can go in before.
> Metrics from JMX cache are not cleared
> --------------------------------------
>
> Key: HBASE-11501
> URL: https://issues.apache.org/jira/browse/HBASE-11501
> Project: HBase
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.98.3
> Reporter: Virag Kothari
> Assignee: Virag Kothari
> Attachments: HBASE-11501.patch, HBASE-11501.patch
>
>
> In JmxCacheBuster, clearJmxCache() has incorrect condition for starting
> JmxCacheBusterRunnable
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