[jira] [Resolved] (HBASE-7092) RegionServer OOM related to onlineregions

["Jimmy Xiang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-7092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jimmy Xiang resolved HBASE-7092.
--------------------------------

    Resolution: Invalid

Found out the root cause: I have too many regions in each region server.  Each region allocates too much block cache.

So it is a configuration issue.  Closed as Invalid.
                
> RegionServer OOM related to onlineregions
> -----------------------------------------
>
>                 Key: HBASE-7092
>                 URL: https://issues.apache.org/jira/browse/HBASE-7092
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Blocker
>             Fix For: 0.96.0
>
>         Attachments: heap-dump.png
>
>
> One instance of "java.util.concurrent.ConcurrentHashMap" loaded by "<system class loader>" occupies 3,972,154,848 (92.88%) bytes. The instance is referenced by org.apache.hadoop.hbase.regionserver.HRegionServer @ 0x7038d3798 , loaded by "sun.misc.Launcher$AppClassLoader @ 0x703994668". The memory is accumulated in one instance of "java.util.concurrent.ConcurrentHashMap$Segment[]" loaded by "<system class loader>".
> Keywords
> sun.misc.Launcher$AppClassLoader @ 0x703994668
> java.util.concurrent.ConcurrentHashMap
> java.util.concurrent.ConcurrentHashMap$Segment[]

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