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https://issues.apache.org/jira/browse/HADOOP-10776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15693902#comment-15693902
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Steve Loughran commented on HADOOP-10776:
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+1 to Vinod's patch with my minor changes; committing to branch-2.8+
> 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,
> HADOOP-10776-branch-2-002.patch, HADOOP-10776-branch-2-003.patch
>
>
> 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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