Vinod Kumar Vavilapalli commented on YARN-3304:

Coming back to this again.

I think the problem of unavailable metrics existing for other APIs too.

Let's make this 0 and consistent, and track the unavailability issues 

[~djp] / [~ka...@cloudera.com] / [~adhoot], can we get going? It's blocking 
2.7, appreciate your response. 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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