Jason Lowe commented on YARN-3360:

The checkstyle comments are complaining about existing method argument lengths 
or the visibility of the Metrics fields.  I was replicating the same style used 
by all other metric fields, so this is consistent with the code base.

> Add JMX metrics to TimelineDataManager
> --------------------------------------
>                 Key: YARN-3360
>                 URL: https://issues.apache.org/jira/browse/YARN-3360
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: timelineserver
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>              Labels: BB2015-05-TBR
>         Attachments: YARN-3360.001.patch, YARN-3360.002.patch, 
> YARN-3360.003.patch
> The TimelineDataManager currently has no metrics, outside of the standard JVM 
> metrics.  It would be very useful to at least log basic counts of method 
> calls, time spent in those calls, and number of entities/events involved.

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