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From "Robert Joseph Evans (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-4437) Race in MR ApplicationMaster can cause reducers to never be scheduled
Date Mon, 16 Jul 2012 19:16:35 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Joseph Evans updated MAPREDUCE-4437:
-------------------------------------------

       Resolution: Fixed
    Fix Version/s: 3.0.0
                   2.1.0-alpha
                   0.23.3
           Status: Resolved  (was: Patch Available)

Thanks Jason,

I put this patch into trunk, branch-2, and branch-0.23
                
> Race in MR ApplicationMaster can cause reducers to never be scheduled
> ---------------------------------------------------------------------
>
>                 Key: MAPREDUCE-4437
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4437
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: applicationmaster, mrv2
>    Affects Versions: 0.23.3, 2.1.0-alpha
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>             Fix For: 0.23.3, 2.1.0-alpha, 3.0.0
>
>         Attachments: MAPREDUCE-4437.patch
>
>
> If the MR AM is notified of container completion by the RM before the AM receives notification
of the container cleanup from the NM then it can fail to schedule reducers indefinitely. 
Logs showing the issue to follow.

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