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From "Bikas Saha (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4252) MR2 job never completes with 1 pending task
Date Tue, 15 May 2012 17:16:02 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13275995#comment-13275995

Bikas Saha commented on MAPREDUCE-4252:

@Sid ,thanks for clarifying.

@Tom, Let me clarify a bit. When the speculative attempt succeeded, then AttemptSucceededTransition
would have KILLED the other running attempts. In this case, the other attempt was not KILLED
but it FAILED on its own.
> MR2 job never completes with 1 pending task
> -------------------------------------------
>                 Key: MAPREDUCE-4252
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4252
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.1
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-4252.patch, MAPREDUCE-4252.patch, MapReduce.png
> This was found by ATM:
> bq. I ran a teragen with 1000 map tasks. Many task attempts failed, but after 999 of
the tasks had completed, the job is now sitting forever with 1 task "pending".

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