[jira] [Commented] (MAPREDUCE-2652) MR-279: Cannot run multiple NMs on a single node

["Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13078760#comment-13078760 ] 

Vinod Kumar Vavilapalli commented on MAPREDUCE-2652:
----------------------------------------------------

I'll start reviewing this patch in a day or worse in two.

Thanks for being on top of this!

> MR-279: Cannot run multiple NMs on a single node 
> -------------------------------------------------
>
>                 Key: MAPREDUCE-2652
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2652
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Robert Joseph Evans
>            Assignee: Robert Joseph Evans
>             Fix For: 0.23.0
>
>         Attachments: MR-2652-v1.txt, MR-2652-v2.txt
>
>
> Currently in MR-279 the Auxiliary services, like ShuffleHandler, have no way to communicate information back to the applications.  Because of this the Map Reduce Application Master has hardcoded in a port of 8080 for shuffle.  This prevents the configuration "mapreduce.shuffle.port" form ever being set to anything but 8080.  The code should be updated to allow this information to be returned to the application master.  Also the data needs to be persisted to the task log so that on restart the data is not lost.

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