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Posted to mapreduce-issues@hadoop.apache.org by "Arun C Murthy (Updated) (JIRA)" <ji...@apache.org> on 2011/10/11 11:51:12 UTC

[jira] [Updated] (MAPREDUCE-3126) mr job stuck because reducers using all slots and mapper isn't scheduled

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy updated MAPREDUCE-3126:
-------------------------------------

    Status: Patch Available  (was: Open)
    
> mr job stuck because reducers using all slots and mapper isn't scheduled
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3126
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3126
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 0.23.0
>            Reporter: Thomas Graves
>            Assignee: Arun C Murthy
>            Priority: Blocker
>             Fix For: 0.23.0
>
>         Attachments: MAPREDUCE-3126.patch
>
>
> The command in MAPREDUCE-3124 run and this job got hung with 1 Map task waiting for resources and 7 Reducers running (2 waiting).  The mapper got scheduler, then AM scheduled the reducers, the map task failed and tried to start a new attempt but reducers were using all the slots.   
> I will try to add some more info from the logs.

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