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https://issues.apache.org/jira/browse/HDFS-13972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16816524#comment-16816524
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CR Hota commented on HDFS-13972:
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[~elgoiri] Thanks for the feedback.
Initially I was inclined with the approach you mentioned , but upon looking
more threadlocal model seems to me be a better way to handle it than
refactoring functions to allow ugi as an input param. It's more error prone to
pass ugi through whole function stack. With threadlocal and getRemoteUser
method, this change is restricted to a specific place and not allowing
developers to think about what ugi to pass around. This is an edge case where
ugi needs to be flipped, for remaining all cases until now, ugi remains that of
end user.
Yes, DN reports surely needs caching, specially also because its a fan out call
to all namenodes and needs multiple optimizations. Will create a Jira for that.
> RBF: Support for Delegation Token (WebHDFS)
> -------------------------------------------
>
> Key: HDFS-13972
> URL: https://issues.apache.org/jira/browse/HDFS-13972
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Assignee: CR Hota
> Priority: Major
> Attachments: HDFS-13972-HDFS-13891.001.patch,
> HDFS-13972-HDFS-13891.002.patch, HDFS-13972-HDFS-13891.003.patch,
> HDFS-13972-HDFS-13891.004.patch, HDFS-13972-HDFS-13891.005.patch,
> HDFS-13972-HDFS-13891.006.patch, HDFS-13972-HDFS-13891.007.patch,
> HDFS-13972-HDFS-13891.008.patch, HDFS-13972-HDFS-13891.009.patch,
> HDFS-13972-HDFS-13891.010.patch, HDFS-13972-HDFS-13891.011.patch,
> HDFS-13972-HDFS-13891.012.patch, TestRouterWebHDFSContractTokens.java
>
>
> HDFS Router should support issuing HDFS delegation tokens through WebHDFS.
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