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https://issues.apache.org/jira/browse/MAPREDUCE-7129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stefanlee updated MAPREDUCE-7129:
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Attachment: (was: AppMaster.zip)
> Cannot assign container Container: maps.isEmpty=true
> ----------------------------------------------------
>
> Key: MAPREDUCE-7129
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7129
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mr-am
> Affects Versions: 2.4.0
> Reporter: stefanlee
> Priority: Major
>
> we have many mapreduce applications without reduce task, and we found a lot
> of *Cannot assign container Container: maps.isEmpty=true* information in
> MRAppMaster log, they are unused containers in *scheduledRequests.assign*
> and released by RM, and MRAppMaster will hang 2 mimute at *getResource* ,i
> doubt if it's inconsistent between *ask* and *maps*?
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