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https://issues.apache.org/jira/browse/HDFS-14545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856256#comment-16856256
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Ayush Saxena commented on HDFS-14545:
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Mine is just a draft, Well I felt we should get from namenode just because
Router is supposed to just take request from client and forward to namenode and
return the response that namenode return, if client directly talked to it. Well
if router can answer too, that is also fine. If there is no scenario where
Router response shall differ from the namenodes. We may just keep the one you
proposed too. It shall save the cost of communicating. You can go ahead with
the work here [~elgoiri]. :)
> RBF: Router should support GetUserMappingsProtocol
> --------------------------------------------------
>
> Key: HDFS-14545
> URL: https://issues.apache.org/jira/browse/HDFS-14545
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Íñigo Goiri
> Priority: Major
> Attachments: HDFS-14545-HDFS-13891-01.patch,
> HDFS-14545-HDFS-13891.000.patch
>
>
> We should be able to check the groups for a user from a Router.
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