Andrew Wang commented on HADOOP-10776:

Hi Vinod, this one looks pretty close based on Chris' last review. Think we can 
get it in soon?

> Open up already widely-used APIs for delegation-token fetching & renewal to 
> ecosystem projects
> ----------------------------------------------------------------------------------------------
>                 Key: HADOOP-10776
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10776
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Robert Joseph Evans
>            Assignee: Vinod Kumar Vavilapalli
>            Priority: Blocker
>         Attachments: HADOOP-10776-20160822.txt
> Storm would like to be able to fetch delegation tokens and forward them on to 
> running topologies so that they can access HDFS (STORM-346).  But to do so we 
> need to open up access to some of APIs. 
> Most notably FileSystem.addDelegationTokens(), Token.renew, 
> Credentials.getAllTokens, and UserGroupInformation but there may be others.
> At a minimum adding in storm to the list of allowed API users. But ideally 
> making them public. Restricting access to such important functionality to 
> just MR really makes secure HDFS inaccessible to anything except MR, or tools 
> that reuse MR input formats.

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