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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-6679) RegionServer aborts due to race between compaction and split
Date Wed, 26 Sep 2012 05:10:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-6679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13463523#comment-13463523
] 

stack commented on HBASE-6679:
------------------------------

For sure the regions was not doubly-assigned? Split happened of the region on one server but
on another server, the same region was being compacted?  You'd need the master logs to figure
it a dbl-assign.

Storefiles are an ImmutableList.

Can you figure a place where we'd be running compactions on a region concurrent w/ our splitting
it?  Compacting we take out write lock.  Doesnt look like any locks while SplitTransaction
is running (closing parent, it'll need write lock... thats after daughters open though).
                
> RegionServer aborts due to race between compaction and split
> ------------------------------------------------------------
>
>                 Key: HBASE-6679
>                 URL: https://issues.apache.org/jira/browse/HBASE-6679
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Devaraj Das
>             Fix For: 0.92.3
>
>         Attachments: rs-crash-parallel-compact-split.log
>
>
> In our nightlies, we have seen RS aborts due to compaction and split racing. Original
parent file gets deleted after the compaction, and hence, the daughters don't find the parent
data file. The RS kills itself when this happens. Will attach a snippet of the relevant RS
logs.

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