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