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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4384) Race conditions in IndexCache
Date Thu, 28 Jun 2012 23:14:44 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403567#comment-13403567
] 

Kihwal Lee commented on MAPREDUCE-4384:
---------------------------------------

branch-1 has similar problem, but its usage is different. While {{ShuffleHandler}} does not
call {{IndexCache#removeMap()}} in 2.0, {{TaskTracker}} does call it. The race seems very
rare, if ever actually happens. I will work on a branch-1 version, once the trunk version
is done.
                
> Race conditions in IndexCache
> -----------------------------
>
>                 Key: MAPREDUCE-4384
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4384
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.0.0-alpha
>            Reporter: Kihwal Lee
>             Fix For: 0.23.3, 2.0.1-alpha, 3.0.0
>
>
> TestIndexCache is intermittently failing due to a race condition. Up on inspection of
IndexCache implementation, more potential issues have been discovered.

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