Junping Du commented on YARN-3044:

bq. l.179: curious, we could add them to the entity as metrics, right?
[~sjlee0], I think you are talking about SystemMetricsEvent here. Isn't it? It 
could be confusing to use event or metrics for SystemMetricsEvent. But if we 
think the semantic of "metrics" is some data (numeric) we can aggregation 
across a time range, this sounds more fall into a category of event. Thoughts?

> [Event producers] Implement RM writing app lifecycle events to ATS
> ------------------------------------------------------------------
>                 Key: YARN-3044
>                 URL: https://issues.apache.org/jira/browse/YARN-3044
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Naganarasimha G R
>         Attachments: YARN-3044-YARN-2928.004.patch, 
> YARN-3044.20150325-1.patch, YARN-3044.20150406-1.patch, 
> YARN-3044.20150416-1.patch
> Per design in YARN-2928, implement RM writing app lifecycle events to ATS.

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