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https://issues.apache.org/jira/browse/YARN-3388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14553165#comment-14553165
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Nathan Roberts commented on YARN-3388:
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Thanks [~leftnoteasy] for the comments. I agree 2b is the way to go. I will
upload a new patch soon.
> Allocation in LeafQueue could get stuck because DRF calculator isn't well
> supported when computing user-limit
> -------------------------------------------------------------------------------------------------------------
>
> Key: YARN-3388
> URL: https://issues.apache.org/jira/browse/YARN-3388
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Affects Versions: 2.6.0
> Reporter: Nathan Roberts
> Assignee: Nathan Roberts
> Attachments: YARN-3388-v0.patch, YARN-3388-v1.patch,
> YARN-3388-v2.patch
>
>
> When there are multiple active users in a queue, it should be possible for
> those users to make use of capacity up-to max_capacity (or close). The
> resources should be fairly distributed among the active users in the queue.
> This works pretty well when there is a single resource being scheduled.
> However, when there are multiple resources the situation gets more complex
> and the current algorithm tends to get stuck at Capacity.
> Example illustrated in subsequent comment.
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