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https://issues.apache.org/jira/browse/HDFS-3957?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-3957:
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Attachment: hdfs-3957-1.patch
Most of the credit here belongs to Elliot, since I just tweaked his code from
HBASE-6409 a bit.
Tested by running the TestMutableMetrics unit tests, and also starting up a
Namenode and jstack'ing it to check that there's only a single MetricsExecutor
thread.
> Change MutableQuantiles to use a shared thread for rolling over metrics
> -----------------------------------------------------------------------
>
> Key: HDFS-3957
> URL: https://issues.apache.org/jira/browse/HDFS-3957
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.0.3-alpha
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Minor
> Attachments: hdfs-3957-1.patch
>
>
> Each MutableQuantiles currently creates its own thread to rollover the
> histogram every interval. It'd be better to do this with a single, shared
> thread or executor, and do it with a ThreadFactory that names it properly.
> Similar changes were made when porting MutableQuantiles to HBase in
> HBASE-6409, so this would also help keep them in sync.
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