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https://issues.apache.org/jira/browse/YARN-5185?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15310278#comment-15310278
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Arun Suresh commented on YARN-5185:
-----------------------------------

[~curino], The patch looks pretty straightforward.
Is it possible to add an explicit testcase for this ? or are you saying that 
the tests in YARN-5165/YARN-5164 will fail without this ? (in which case don't 
you think you should probably merge this with the YARN-5165 patch ?)

> StageAllocaterGreedyRLE: NPE in corner case 
> --------------------------------------------
>
>                 Key: YARN-5185
>                 URL: https://issues.apache.org/jira/browse/YARN-5185
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: capacityscheduler, fairscheduler, resourcemanager
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>         Attachments: YARN-5185.1.patch
>
>
> If the plan has only one interval, and the reservation exactly overlap we 
> will have a null from partialMap.higherKey() that we should guard against.



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