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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5875) Make Counter limits consistent across JobClient, MRAppMaster, and YarnChild
Date Mon, 31 Jul 2017 22:16:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16108068#comment-16108068
] 

Allen Wittenauer commented on MAPREDUCE-5875:
---------------------------------------------

bq. To be clear, this fix never land in any non-alpha release, so we shouldn't claim the fix
is released or any regression due to revert of this fix.

Doesn't matter. The release notes for alpha1 said that this patch is there. At a minimum,
-beta1 will need to include a note that says it was removed or, preferably, removed but replaced
with something better.

> Make Counter limits consistent across JobClient, MRAppMaster, and YarnChild
> ---------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5875
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5875
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: applicationmaster, client, task
>    Affects Versions: 2.4.0
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>             Fix For: 3.0.0-alpha1
>
>         Attachments: MAPREDUCE-5875.v01.patch, MAPREDUCE-5875.v02.patch, MAPREDUCE-5875.v03.patch,
MAPREDUCE-5875.v04.patch, MAPREDUCE-5875.v05.patch, MAPREDUCE-5875.v06.patch, MAPREDUCE-5875.v07.patch,
MAPREDUCE-5875.v08.patch, MAPREDUCE-5875.v09.patch
>
>
> 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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