Jason Lowe commented on YARN-182:

I don't believe this is related to YARN-903, rather it seems more likely to be 
related to MAPREDUCE-5465.  The MapReduce ApplicationMaster kills tasks as soon 
as they report success via the umbilical connection, and sometimes that kill 
arrives before the task exits on its own.  In those cases the containers will 
be marked as killed by the ApplicationMaster.

> Unnecessary "Container killed by the ApplicationMaster" message for 
> successful containers
> -----------------------------------------------------------------------------------------
>                 Key: YARN-182
>                 URL: https://issues.apache.org/jira/browse/YARN-182
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.0.1-alpha
>            Reporter: zhengqiu cai
>            Assignee: Omkar Vinit Joshi
>              Labels: hadoop, usability
>         Attachments: Log.txt
> I was running "wordcount" and the resourcemanager web UI shown the status as 
> FINISHED SUCCEEDED, but the log shown "Container killed by the 
> ApplicationMaster"

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