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https://issues.apache.org/jira/browse/YARN-3304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14357536#comment-14357536
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Vinod Kumar Vavilapalli commented on YARN-3304:
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How about we simplify this and throw an explicit exception when we think it is 
unavailable and let higher layers handle it appropriately when that happens?

IAC, I'd like us to make some progress to unblock 2.7. Tx.

> ResourceCalculatorProcessTree#getCpuUsagePercent default return value is 
> inconsistent with other getters
> --------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3304
>                 URL: https://issues.apache.org/jira/browse/YARN-3304
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>            Reporter: Junping Du
>            Assignee: Karthik Kambatla
>            Priority: Blocker
>
> Per discussions in YARN-3296, getCpuUsagePercent() will return -1 for 
> unavailable case while other resource metrics are return 0 in the same case 
> which sounds inconsistent.



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