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https://issues.apache.org/jira/browse/HDFS-14006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16694316#comment-16694316
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CR Hota commented on HDFS-14006:
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[~elgoiri] Thanks for the review. Took care of your comments in the next patch.
> Refactor name node to allow different token verification implementations
> ------------------------------------------------------------------------
>
> Key: HDFS-14006
> URL: https://issues.apache.org/jira/browse/HDFS-14006
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: CR Hota
> Assignee: CR Hota
> Priority: Major
> Attachments: HDFS-14006.001.patch, HDFS-14006.002.patch
>
>
> Router currently uses Namenode web resources to read and verify delegation
> tokens. This model doesn't work when router will be deployed in secured mode.
> This change will introduce router's own UserProvider resource and
> dependencies.
> In the current deployment one can see this exception.
> {"RemoteException":\{"exception":"ClassCastException","javaClassName":"java.lang.ClassCastException","message":"org.apache.hadoop.hdfs.server.federation.router.Router
> cannot be cast to org.apache.hadoop.hdfs.server.namenode.NameNode"}}
> In the proposed change, router will maintain its own web resource, that will
> be similar to current namenode, but modified to get back a router instance
> instead of namenode.
>
>
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