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https://issues.apache.org/jira/browse/YARN-1867?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13946096#comment-13946096
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Vinod Kumar Vavilapalli commented on YARN-1867:
-----------------------------------------------
Okay, I think I know the issue. Working on a patch..
> NPE while fetching apps via the REST API
> ----------------------------------------
>
> Key: YARN-1867
> URL: https://issues.apache.org/jira/browse/YARN-1867
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.4.0
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Priority: Blocker
> Labels: rest_api
>
> We ran into the following NPE when fetching applications using the REST API:
> {noformat}
> INTERNAL_SERVER_ERROR
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.security.ApplicationACLsManager.checkAccess(ApplicationACLsManager.java:104)
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices.hasAccess(RMWebServices.java:123)
> at
> org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices.getApps(RMWebServices.java:418)
> {noformat}
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