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Posted to yarn-issues@hadoop.apache.org by "Arun Suresh (JIRA)" <ji...@apache.org> on 2018/01/03 16:06:01 UTC
[jira] [Commented] (YARN-7681) Scheduler should double-check
placement constraint before actual allocation is made
[ https://issues.apache.org/jira/browse/YARN-7681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16309837#comment-16309837 ]
Arun Suresh commented on YARN-7681:
-----------------------------------
[~cheersyang], now that YARN-7682 is done, maybe you want to give this a shot ?
I think something along the lines of [this|https://issues.apache.org/jira/browse/YARN-7613?focusedCommentId=16303343&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16303343] should be fine.
> 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
>
> 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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