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https://issues.apache.org/jira/browse/YARN-879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13704143#comment-13704143
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Devaraj K commented on YARN-879:
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I am not sure Junping, why was this done. We can get some info from revision
history.
> Fix NPE in Application.getResources()
> -------------------------------------
>
> Key: YARN-879
> URL: https://issues.apache.org/jira/browse/YARN-879
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 3.0.0, 2.1.0-beta
> Reporter: Junping Du
> Assignee: Junping Du
> Attachments: YARN-879.patch
>
>
> getResources() will return a list of containers that allocated by RM.
> However, it is now return null directly. The worse thing is: if LOG.debug is
> enabled, then it will definitely cause NPE exception.
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