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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4576) Large dist cache can block tasktracker heartbeat
Date Tue, 28 Aug 2012 15:53:07 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4576?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13443231#comment-13443231
] 

Robert Joseph Evans commented on MAPREDUCE-4576:
------------------------------------------------

I have "verified" with some code changes that this fixes the issue.  It is very difficult
to reproduce the error.  I had to modify the code to cause the issue to show up more often.
 I had to make it so the dist cache always was trying to delete things, and it never actually
deleted them, I also had to modify it so that all dist cache entries take a long time to download,
and on top of that I had to hit it just right so that a job was finishing at the same time
a dist cache entry was being deleted.  ugg.
                
> Large dist cache can block tasktracker heartbeat
> ------------------------------------------------
>
>                 Key: MAPREDUCE-4576
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4576
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.205.0, 1.0.0
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>         Attachments: MR-4576.txt
>
>


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