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Posted to mapreduce-dev@hadoop.apache.org by "Ahmed Radwan (JIRA)" <ji...@apache.org> on 2012/07/18 00:50:34 UTC

[jira] [Resolved] (MAPREDUCE-4358) Reducers are assigned containers before all maps are assigned containers

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4358?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ahmed Radwan resolved MAPREDUCE-4358.
-------------------------------------

    Resolution: Duplicate

Seems to be the same issue resolved in MAPREDUCE-4299.
                
> 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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