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Posted to mapreduce-dev@hadoop.apache.org by "Ahmed Radwan (JIRA)" <ji...@apache.org> on 2012/06/20 21:40:42 UTC
[jira] [Created] (MAPREDUCE-4358) Reducers are assigned containers
before all maps are assigned containers
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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[jira] [Resolved] (MAPREDUCE-4358) Reducers are assigned containers
before all maps are assigned containers
Posted by "Ahmed Radwan (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAPREDUCE-4358?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
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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