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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-900) Regionserver memory leak causing OOME during relatively modest bulk importing
Date Tue, 16 Dec 2008 06:38:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-900?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-900:
------------------------

    Attachment: hbase-900-part3.patch

part 3 takes size of region memcaches at start of flush and then subtracts the size on flush
completion rather than set things to zero as soon as the cache starts up.   Its still not
enough for case where cells are 10bytes in size but it goes half-as far again before OOME'ing.
 Might be enough for 0.19.0.

> Regionserver memory leak causing OOME during relatively modest bulk importing
> -----------------------------------------------------------------------------
>
>                 Key: HBASE-900
>                 URL: https://issues.apache.org/jira/browse/HBASE-900
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.18.1, 0.19.0
>            Reporter: Jonathan Gray
>            Assignee: stack
>            Priority: Blocker
>         Attachments: 900-part2-v4.patch, 900-part2-v5.patch, 900-part2-v7.patch, 900-part2.patch,
900.patch, hbase-900-part3.patch, memoryOn13.png
>
>
> I have recreated this issue several times and it appears to have been introduced in 0.2.
> During an import to a single table, memory usage of individual region servers grows w/o
bounds and when set to the default 1GB it will eventually die with OOME.  This has happened
to me as well as Daniel Ploeg on the mailing list.  In my case, I have 10 RS nodes and OOME
happens w/ 1GB heap at only about 30-35 regions per RS.  In previous versions, I have imported
to several hundred regions per RS with default heap size.
> I am able to get past this by increasing the max heap to 2GB.  However, the appearance
of this in newer versions leads me to believe there is now some kind of memory leak happening
in the region servers during import.

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