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https://issues.apache.org/jira/browse/MAPREDUCE-3878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210837#comment-13210837
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Jonathan Eagles commented on MAPREDUCE-3878:
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Implementation from AMWebServices.
> Null user on filtered jobhistory job page
> -----------------------------------------
>
> Key: MAPREDUCE-3878
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3878
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.1
> Reporter: Jonathan Eagles
> Assignee: Jonathan Eagles
> Priority: Critical
> Attachments: MAPREDUCE-3878.patch
>
>
> If jobhistory/job.* is filtered to bypass acl, resulting page will always
> show Null user. This differs from 0.20 where filtering on this page, bypasses
> security to allow all access to the page. essentially passes a null user to
> AppController where an exception is thrown. If a null user is detected, we
> should acl checking is disabled on this page.
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