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From "Adrian Muraru (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-7309) Metrics refresh-task is not canceled when regions are closed, leaking HRegion objects
Date Sun, 09 Dec 2012 04:17:22 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adrian Muraru updated HBASE-7309:
---------------------------------

    Attachment: HBASE-7309_v2.patch

TestHeapSize was failing due to the new regionwrapper ref added in v1 patch.
Incremented HRegion.FIXED_OVERHEAD
                
> 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: 0.92.2, 0.94.3
>            Reporter: Adrian Muraru
>            Priority: Critical
>         Attachments: HBASE-7309_v1.patch, HBASE-7309_v2.patch
>
>
> 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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