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https://issues.apache.org/jira/browse/YARN-6024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15782109#comment-15782109
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Wangda Tan commented on YARN-6024:
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[~Ying Zhang],
Gotcha, thanks for elaborate. Yeah it was a historical issue, I remember
there're some changes after branch-2.8 to get rid of newRequired, but there're
also some changes in application / leaf queue to handle resource-limit and
headroom properly (Like respect parent queue's max capacity, etc.). I cannot
remember all details, but to avoid regression, let's just focus changes in the
patch.
> Capacity Scheduler continuous reservation looking doesn't work when queue's
> used+reserved = max
> -----------------------------------------------------------------------------------------------
>
> Key: YARN-6024
> URL: https://issues.apache.org/jira/browse/YARN-6024
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Attachments: YARN-6024-branch-2.7.001.patch,
> YARN-6024-branch-2.7.001.patch, YARN-6024.001.patch
>
>
> Found one corner case when continuous reservation looking doesn't work:
> When queue's used=max, the queue's capacity check fails.
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