Eric Payne commented on YARN-4354:


Thanks Jason for catching and fixing this.

I also verified that the new test 
({{TestLocalResourcesTrackerImpl#testReleaseWhileDownloading}}) passes with the 
fix and NPEs without it.

And, I ran {{TestResourceLocalizationService}} (the above test that is failing) 
in my local build environment and it passes for me.

> Public resource localization fails with NPE
> -------------------------------------------
>                 Key: YARN-4354
>                 URL: https://issues.apache.org/jira/browse/YARN-4354
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.7.2
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Blocker
>         Attachments: YARN-4354-unittest.patch, YARN-4354.001.patch, 
> YARN-4354.002.patch
> I saw public localization on nodemanagers get stuck because it was constantly 
> rejecting requests to the thread pool executor.

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