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From "genericqa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7681) Scheduler should double-check placement constraint before actual allocation is made
Date Tue, 09 Jan 2018 18:41:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318899#comment-16318899
] 

genericqa commented on YARN-7681:
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| (x) *{color:red}-1 overall{color}* |
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YARN-7681 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute
for help. {color} |
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| JIRA Issue | YARN-7681 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12905298/YARN-7681.001.patch
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| Console output | https://builds.apache.org/job/PreCommit-YARN-Build/19155/console |
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> Scheduler should double-check placement constraint before actual allocation is made
> -----------------------------------------------------------------------------------
>
>                 Key: YARN-7681
>                 URL: https://issues.apache.org/jira/browse/YARN-7681
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: RM, scheduler
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>         Attachments: YARN-7681.001.patch
>
>
> This JIRA is created based on the discussions under YARN-7612, see comments after [this
comment|https://issues.apache.org/jira/browse/YARN-7612?focusedCommentId=16303051&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16303051].
AllocationTagsManager maintains tags info that helps to make placement decisions at placement
phase, however tags are changing along with container's lifecycle, so it is possible that
the placement violates the constraints at the scheduling phase. Propose to add an extra check
in the scheduler to make sure constraints are still satisfied during the actual allocation.



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