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https://issues.apache.org/jira/browse/YARN-9578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16861949#comment-16861949
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Weiwei Yang commented on YARN-9578:
-----------------------------------

Thanks [~Tao Yang]. I see, then it's fine, given subList won't have much 
overhead.

For the REST API, please update to the simpler form we have discussed, I can 
mark this as an incompatible change. That should be OK, we should do it earlier 
than later.

Thanks

> Add limit/actions/summarize options for app activities REST API
> ---------------------------------------------------------------
>
>                 Key: YARN-9578
>                 URL: https://issues.apache.org/jira/browse/YARN-9578
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>            Priority: Major
>         Attachments: YARN-9578.001.patch, YARN-9578.002.patch, 
> YARN-9578.003.patch, YARN-9578.004.patch, YARN-9578.005.patch
>
>
> Currently all completed activities of specified application in cache will be 
> returned forĀ application activities REST API. Most results may be redundant 
> in some scenarios which only need a few latest results, for example, perhaps 
> only one result is needed to be shown on UI for debugging.



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