Junping Du commented on YARN-3046:

bq. If that turns out to be the case, we could conceivably create subclasses in 
a standard place for MR, and have all use cases use those concrete subclasses. 
But I'm fine deferring that aspect a little bit. It's not a critical point.
Another option is to make HierarchicalTimelineEntity non abstract? I also agree 
we should open a new JIRA to discuss this later.

> [Event producers] Implement MapReduce AM writing MR events to v2 ATS
> --------------------------------------------------------------------
>                 Key: YARN-3046
>                 URL: https://issues.apache.org/jira/browse/YARN-3046
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Junping Du
>         Attachments: YARN-3046-no-test-v2.patch, YARN-3046-no-test.patch, 
> YARN-3046-v1-rebase.patch, YARN-3046-v1.patch, YARN-3046-v2.patch, 
> YARN-3046-v3.patch, YARN-3046-v4.patch, YARN-3046-v5.patch, YARN-3046-v6.patch
> Per design in YARN-2928, select a handful of MR metrics (e.g. HDFS bytes 
> written) and have the MR AM write the framework-specific metrics to ATS.

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