Peter Bacsko commented on YARN-9903:

[~Jim_Brennan] thanks for the patch. From your comment, I assume that you've 
been using this change for a while and it's safe. Is that correct?

> Support reservations continue looking for Node Labels
> -----------------------------------------------------
>                 Key: YARN-9903
>                 URL: https://issues.apache.org/jira/browse/YARN-9903
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Tarun Parimi
>            Assignee: Jim Brennan
>            Priority: Major
>         Attachments: YARN-9903.001.patch, YARN-9903.002.patch
> YARN-1769 brought in reservations continue looking feature which improves the 
> several resource reservation scenarios. However, it is not handled currently 
> when nodes have a label assigned to them. This is useful and in many cases 
> necessary even for Node Labels. So we should look to support this for node 
> labels also.
> For example, in AbstractCSQueue.java, we have the below TODO.
> {code:java}
> // TODO, now only consider reservation cases when the node has no label 
> if (this.reservationsContinueLooking && nodePartition.equals( 
> RMNodeLabelsManager.NO_LABEL) && Resources.greaterThan( resourceCalculator, 
> clusterResource, resourceCouldBeUnreserved, Resources.none())) {
> {code}
> cc [~sunilg]

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