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https://issues.apache.org/jira/browse/YARN-6375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15986299#comment-15986299
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Varun Saxena commented on YARN-6375:
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Ping [~vrushalic].
Is the current approach fine?

> App level aggregation should not consider metric values reported in the 
> previous aggregation cycle
> --------------------------------------------------------------------------------------------------
>
>                 Key: YARN-6375
>                 URL: https://issues.apache.org/jira/browse/YARN-6375
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Varun Saxena
>            Assignee: Varun Saxena
>         Attachments: YARN-6375-YARN-5355.01.patch
>
>
> Currently app level aggregation is done every 15 seconds.
> And we consider last reported metric value for each entity belonging to an 
> app for aggregation.
> We however merely update the corresponding metric values for the entity on 
> put. We never remove the entries.
> But it is possible that multiple entities finish during lifetime of an 
> application. We however continue to consider them till the end.
> We should however not consider metric values of entities unless reported 
> within the 15 second period.
> Consider containers. For a long running app, several containers would start 
> and end at various times during the lifetime of an app.
> To consider metrics for all the containers throughout the lifetime of app, 
> hence wont be correct.



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