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Posted to mapreduce-issues@hadoop.apache.org by "stefanlee (JIRA)" <ji...@apache.org> on 2018/08/14 14:46:00 UTC

[jira] [Commented] (MAPREDUCE-7129) Cannot assign container Container: maps.isEmpty=true

    [ https://issues.apache.org/jira/browse/MAPREDUCE-7129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16579897#comment-16579897 ] 

stefanlee commented on MAPREDUCE-7129:
--------------------------------------

[~varun_saxena] [~rohithsharma] [~leftnoteasy] please have a look

> 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
>         Attachments: AppMaster.log
>
>
> 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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