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Posted to yarn-issues@hadoop.apache.org by "Nathan Roberts (JIRA)" <ji...@apache.org> on 2015/04/01 00:40:55 UTC
[jira] [Commented] (YARN-3388) Allocation in LeafQueue could get
stuck because DRF calculator isn't well supported when computing user-limit
[ https://issues.apache.org/jira/browse/YARN-3388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14389550#comment-14389550 ]
Nathan Roberts commented on YARN-3388:
--------------------------------------
[~leftnoteasy] - Thanks for the comments. I'm tweaking patch to avoid summing so often.
> 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
>
>
> 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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