Karthik Kambatla commented on YARN-1959:

Thanks Anubhav. 

Thought about this a little more, and I wonder if we need to have separate 
headroom calculations for policies. Would DRF#getHeadroom not work for other 

> Fix headroom calculation in Fair Scheduler
> ------------------------------------------
>                 Key: YARN-1959
>                 URL: https://issues.apache.org/jira/browse/YARN-1959
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Sandy Ryza
>            Assignee: Anubhav Dhoot
>         Attachments: YARN-1959.001.patch, YARN-1959.prelim.patch
> The Fair Scheduler currently always sets the headroom to 0.

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