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Posted to yarn-issues@hadoop.apache.org by "Wangda Tan (JIRA)" <ji...@apache.org> on 2015/05/08 20:34:01 UTC
[jira] [Commented] (YARN-3434) Interaction between reservations and
userlimit can result in significant ULF violation
[ https://issues.apache.org/jira/browse/YARN-3434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14535188#comment-14535188 ]
Wangda Tan commented on YARN-3434:
----------------------------------
[~tgraves],
Patch looks good, will commit after Jenkins get back.
> Interaction between reservations and userlimit can result in significant ULF violation
> --------------------------------------------------------------------------------------
>
> Key: YARN-3434
> URL: https://issues.apache.org/jira/browse/YARN-3434
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Affects Versions: 2.6.0
> Reporter: Thomas Graves
> Assignee: Thomas Graves
> Fix For: 2.8.0
>
> Attachments: YARN-3434-branch2.7.patch, YARN-3434.patch, YARN-3434.patch, YARN-3434.patch, YARN-3434.patch, YARN-3434.patch, YARN-3434.patch, YARN-3434.patch
>
>
> ULF was set to 1.0
> User was able to consume 1.4X queue capacity.
> It looks like when this application launched, it reserved about 1000 containers, each 8G each, within about 5 seconds. I think this allowed the logic in assignToUser() to allow the userlimit to be surpassed.
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