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https://issues.apache.org/jira/browse/HDFS-9525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15053446#comment-15053446
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Allen Wittenauer commented on HDFS-9525:
----------------------------------------

I've reverted the patch.

bq. except the multiple token file support which is what this jira purported to 
do.

Well, no.  The whole underlying point of this JIRA is to fix WebHDFS which 
despite "[t]remendous effort" doesn't work with multiple Kerberos realms that 
don't have an established trust when using something like distcp.  

> hadoop utilities need to support provided delegation tokens
> -----------------------------------------------------------
>
>                 Key: HDFS-9525
>                 URL: https://issues.apache.org/jira/browse/HDFS-9525
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: security
>    Affects Versions: 3.0.0
>            Reporter: Allen Wittenauer
>            Assignee: HeeSoo Kim
>            Priority: Blocker
>             Fix For: 3.0.0
>
>         Attachments: HDFS-7984.001.patch, HDFS-7984.002.patch, 
> HDFS-7984.003.patch, HDFS-7984.004.patch, HDFS-7984.005.patch, 
> HDFS-7984.006.patch, HDFS-7984.007.patch, HDFS-7984.patch
>
>
> When using the webhdfs:// filesystem (especially from distcp), we need the 
> ability to inject a delegation token rather than webhdfs initialize its own.  
> This would allow for cross-authentication-zone file system accesses.



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