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https://issues.apache.org/jira/browse/HDFS-6312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14038084#comment-14038084
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Yongjun Zhang commented on HDFS-6312:
-------------------------------------

Many thanks Alejandro and Daryn!


> WebHdfs HA failover is broken on secure clusters
> ------------------------------------------------
>
>                 Key: HDFS-6312
>                 URL: https://issues.apache.org/jira/browse/HDFS-6312
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 3.0.0, 2.4.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Blocker
>             Fix For: 2.5.0
>
>         Attachments: HDFS-6312.attempted.patch
>
>
> When webhdfs does a failover, it blanks out the delegation token.  This will 
> cause subsequent operations against the other NN to acquire a new token.  
> Tasks cannot acquire a token (no kerberos credentials) so jobs will fail.



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