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https://issues.apache.org/jira/browse/MAPREDUCE-6925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17802814#comment-17802814
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Shilun Fan commented on MAPREDUCE-6925:
---------------------------------------

Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a 
blocker. Retarget 3.5.0.

> CLONE - Make Counter limits consistent across JobClient, MRAppMaster, and 
> YarnChild
> -----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6925
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6925
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: applicationmaster, client, task
>    Affects Versions: 2.4.0
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>            Priority: Major
>
> Currently, counter limits "mapreduce.job.counters.*" handled by 
> {{org.apache.hadoop.mapreduce.counters.Limits}} are initialized 
> asymmetrically: on the client side, and on the AM, job.xml is ignored whereas 
> it's taken into account in YarnChild.
> It would be good to make the Limits job-configurable, such that max 
> counters/groups is only increased when needed. With the current Limits 
> implementation relying on static constants, it's going to be challenging for 
> tools that submit jobs concurrently  without resorting to class loading 
> isolation.
> The patch that I am uploading is not perfect but demonstrates the issue. 



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