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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (MAPREDUCE-4437) Race in MR ApplicationMaster can cause reducers to never be scheduled
Date Thu, 11 Oct 2012 17:50:50 GMT

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

Arun C Murthy closed MAPREDUCE-4437.
------------------------------------

    
> 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, 2.0.0-alpha
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Critical
>             Fix For: 0.23.3, 2.0.2-alpha
>
>         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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