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https://issues.apache.org/jira/browse/YARN-3855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602308#comment-14602308
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Allen Wittenauer commented on YARN-3855:
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bq. we do see some use cases that people want their cluster secure but not the 
web UI.

Just because people want it, doesn't mean it's a valid configuration.   By 
enabling insecure browsing on the YARN UI on a secure cluster with ACL 
management setup, you've essentially opened up a security hole.

bq. which is what ATS is currently doing.

Then ATS also has a security hole.

> If acl is enabled and http.authentication.type is simple, user cannot view 
> the app page in default setup
> --------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3855
>                 URL: https://issues.apache.org/jira/browse/YARN-3855
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-3855.1.patch
>
>
> If all ACLs (admin acl, queue-admin-acls etc.) are setup properly and 
> "http.authentication.type" is 'simple' in secure mode , user cannot view the 
> application web page in default setup because the incoming user is always 
> considered as "dr.who" . User also cannot pass "user.name" to indicate the 
> incoming user name, because AuthenticationFilterInitializer is not enabled by 
> default. This is inconvenient from user's perspective. 



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