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From "Jonathan Eagles (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2666) MR-279: Need to retrieve shuffle port number on ApplicationMaster restart
Date Thu, 13 Oct 2011 01:17:11 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126283#comment-13126283

Jonathan Eagles commented on MAPREDUCE-2666:

Thanks to Bobby, Vinod, and Arun for helping to get this in.

bq. I just committed this. Thanks Jonathan!
bq. Thanks to Bobby and Vinod for reviews.
> MR-279: Need to retrieve shuffle port number on ApplicationMaster restart
> -------------------------------------------------------------------------
>                 Key: MAPREDUCE-2666
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2666
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Robert Joseph Evans
>            Assignee: Jonathan Eagles
>            Priority: Blocker
>             Fix For: 0.23.0
>         Attachments: MAPREDUCE-2666.patch, MAPREDUCE-2666.patch
> MAPREDUCE-2652 allows ShuffleHandler to return the port it is operating on.  In the case
of an ApplicationMaster crash where it needs to be restarted that information is lost.  We
either need to re-query it from each of the NodeManagers or to persist it to the JobHistory
logs and retrieve it again.  The job history logs is probably the simpler solution.

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