Varun Vasudev commented on YARN-3517:

It can be null if no authentication filter is setup. Also, the aclsManager 
doesn't handle a null callerUGI and ends up throwing a null pointer exception.

> RM web ui for dumping scheduler logs should be for admins only
> --------------------------------------------------------------
>                 Key: YARN-3517
>                 URL: https://issues.apache.org/jira/browse/YARN-3517
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager, security
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>            Priority: Blocker
>              Labels: security
>         Attachments: YARN-3517.001.patch, YARN-3517.002.patch, 
> YARN-3517.003.patch, YARN-3517.004.patch, YARN-3517.005.patch
> YARN-3294 allows users to dump scheduler logs from the web UI. This should be 
> for admins only.

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