[jira] [Created] (HBASE-7309) Metrics refresh-task is not canceled when regions are closed, leaking HRegion objects

["Adrian Muraru (JIRA)" <ji...@apache.org>]

Adrian Muraru created HBASE-7309:
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             Summary: Metrics refresh-task is not canceled when regions are closed, leaking HRegion objects
                 Key: HBASE-7309
                 URL: https://issues.apache.org/jira/browse/HBASE-7309
             Project: HBase
          Issue Type: Bug
          Components: metrics, regionserver
    Affects Versions: 0.94.3, 0.92.2
            Reporter: Adrian Muraru
            Priority: Critical


While investigating HBASE-7205 by repeatedly enabling and disabling one table having 100 regions I noticed that closed HRegion objects are kept forever in memory. 
The memory analyzer tool indicates a reference to HRegion object in metrics refresh-task ({{MetricsRegionWrapperImpl.HRegionMetricsWrapperRunnable}}) that prevents the HRegion object to be collected.


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