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https://issues.apache.org/jira/browse/MAPREDUCE-6424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15263116#comment-15263116
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Sangjin Lee commented on MAPREDUCE-6424:
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(JobHistoryEventHandler.java)
- l.1053: I believe this causes a checkstyle violation (line too long)
- l.1054: {{timestamp}} here is no longer used, and should be removed

(JobFinishedEvent.java)
- l.161: Sorry I should have been clearer, but since we have a clear timestamp 
associated with this event ({{finishTime}}), I think we ought to use that time 
over the current time millis. Thoughts? Same for {{MapAttemptFinishedEvent}}, 
{{ReduceAttemptFinishedEvent}}, {{TaskAttemptFinishedEvent}}, 
{{TaskAttemptUnsuccessfulCompletionEvent}}, {{TaskFailedEvent}}, and 
{{TaskFinishedEvent}}

(TestMRTimelineEventHandling.java)
- l.337-359: Is it possible to use {{GenericTestUtils.waitFor()}} for this?


> Store MR counters as timeline metrics instead of event
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-6424
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6424
>             Project: Hadoop Map/Reduce
>          Issue Type: Sub-task
>            Reporter: Junping Du
>            Assignee: Naganarasimha G R
>              Labels: yarn-2928-1st-milestone
>         Attachments: MAPREDUCE-6424-YARN-2928.v1.001.patch, 
> MAPREDUCE-6424-YARN-2928.v1.002.patch, MAPREDUCE-6424-YARN-2928.v1.003.patch
>
>
> In MAPREDUCE-6327, we make map/reduce counters get encoded from 
> JobFinishedEvent as timeline events with counters details in JSON format. 
> We need to store framework specific counters as metrics in timeline service 
> to support query, aggregation, etc.



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