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https://issues.apache.org/jira/browse/YARN-2527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14157431#comment-14157431
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Benoy Antony commented on YARN-2527:
------------------------------------

Thanks a lot, [~zjshen].

> NPE in ApplicationACLsManager
> -----------------------------
>
>                 Key: YARN-2527
>                 URL: https://issues.apache.org/jira/browse/YARN-2527
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.5.0
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>             Fix For: 2.6.0
>
>         Attachments: YARN-2527.patch, YARN-2527.patch, YARN-2527.patch
>
>
> NPE in _ApplicationACLsManager_ can result in 500 Internal Server Error.
> The relevant stacktrace snippet from the ResourceManager logs is as below
> {code}
> Caused by: java.lang.NullPointerException
>         at 
> org.apache.hadoop.yarn.server.security.ApplicationACLsManager.checkAccess(ApplicationACLsManager.java:104)
>         at 
> org.apache.hadoop.yarn.server.resourcemanager.webapp.AppBlock.render(AppBlock.java:101)
>         at 
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.render(HtmlBlock.java:66)
>         at 
> org.apache.hadoop.yarn.webapp.view.HtmlBlock.renderPartial(HtmlBlock.java:76)
>         at org.apache.hadoop.yarn.webapp.View.render(View.java:235)
> {code}
> This issue was reported by [~miguenther].



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