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From "Ahmed Radwan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4358) Reducers are assigned containers before all maps are assigned containers
Date Wed, 20 Jun 2012 19:40:42 GMT
Ahmed Radwan created MAPREDUCE-4358:
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             Summary: Reducers are assigned containers before all maps are assigned containers
                 Key: MAPREDUCE-4358
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4358
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv2
    Affects Versions: 2.0.0-alpha
            Reporter: Ahmed Radwan


Reducers start to get containers before all maps are. We have seen this issue and it is problematic
since if there is no avaialable resources for the remaining maps, the job will just stall
where reducers are waiting for mappers which are unable to start because there is no containers
available.

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