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https://issues.apache.org/jira/browse/YARN-1959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144111#comment-14144111
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Karthik Kambatla commented on YARN-1959:
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Thanks for the clarification here and offline. I understand why the headroom
needs to policy specific. Couple of nits:
# In FifoPolicy and FairSharePolicy, we can avoid one instance of Resource -
{{queueAvailable}}, and use an int for memory instead. May be, we should just
use two ints in DRFPolicy as well.
# TestFSAppAttempt#VerifyHeadroom should be verifyHeadroom.
> 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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