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https://issues.apache.org/jira/browse/HADOOP-8043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205092#comment-13205092
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Alejandro Abdelnur commented on HADOOP-8043:
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How is this being done for the UGI keytab used by the DN & TT ?
> KerberosAuthenticationFilter and friends have some problems
> -----------------------------------------------------------
>
> Key: HADOOP-8043
> URL: https://issues.apache.org/jira/browse/HADOOP-8043
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 1.0.0
> Reporter: Allen Wittenauer
> Priority: Critical
> Attachments: HADOOP-8043-branch-1.0.txt
>
>
> KerberosAuthenticationFilter and friends have three killer usability issues
> and bugs:
> 1. Documentation is misleading/wrong.
> 2. Shared secret stored in a world readable file.
> 3. Lacks support for _HOST macro
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