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https://issues.apache.org/jira/browse/YARN-7682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16304028#comment-16304028
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Konstantinos Karanasos commented on YARN-7682:
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bq. If we want to make the canAssign be part of the PCM, I think we should make
the tags manager be a field of the PCM rather than passing it as a parameter
(i.e., pass the tag manager during PCM's initialization
bq. Make sense to me
Thinking more about it: another way would be to get the tags manager from the
RMContext. Either way works, but in any case let's not pass it as a parameter.
> Expose canAssign method in the PlacementConstraintManager
> ---------------------------------------------------------
>
> Key: YARN-7682
> URL: https://issues.apache.org/jira/browse/YARN-7682
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Arun Suresh
> Assignee: Panagiotis Garefalakis
> Attachments: YARN-7682.wip.patch
>
>
> As per discussion in YARN-7613. Lets expose {{canAssign}} method in the
> PlacementConstraintManager that takes a sourceTags, applicationId,
> SchedulerNode and AllocationTagsManager and returns true if constraints are
> not violated by placing the container on the node.
> I prefer not passing in the SchedulingRequest, since it can have > 1
> numAllocations. We want this api to be called for single allocations.
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