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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9949) Fix the race condition between Compaction and StoreScanner.init
Date Thu, 14 Nov 2013 21:57:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13822975#comment-13822975
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Sergey Shelukhin commented on HBASE-9949:
-----------------------------------------

minor nit on rb, can be fixed on commit; I'm +0.9, noticed that [~jmhsieh] was also leery
of the approach on RB. 
I think it may warrant more discussion - how we do this kind of stuff (since presumably this
injection will start being used all over the place if committed), but if there's general agreement
then I'm +1

> Fix the race condition between Compaction and StoreScanner.init
> ---------------------------------------------------------------
>
>                 Key: HBASE-9949
>                 URL: https://issues.apache.org/jira/browse/HBASE-9949
>             Project: HBase
>          Issue Type: Bug
>          Components: Scanners
>    Affects Versions: 0.89-fb
>            Reporter: Manukranth Kolloju
>            Assignee: Manukranth Kolloju
>            Priority: Minor
>             Fix For: 0.89-fb
>
>         Attachments: 9949-trunk-v1.txt, 9949-trunk-v2.txt
>
>   Original Estimate: 48h
>  Remaining Estimate: 48h
>
> The StoreScanner constructor has multiple stages and there can be a race betwwen an ongoing
compaction and the StoreScanner constructor where we might get the list of scanners before
a compaction and seek on those scanners after the compaction.



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