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https://issues.apache.org/jira/browse/HDFS-13045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16426243#comment-16426243
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Íñigo Goiri commented on HDFS-13045:
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As the unit test is kind of hard to do, we could add unit tests for the
{{processMessage()}} function individually.
> RBF: Improve error message returned from subcluster
> ---------------------------------------------------
>
> Key: HDFS-13045
> URL: https://issues.apache.org/jira/browse/HDFS-13045
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Wei Yan
> Assignee: Wei Yan
> Priority: Minor
> Attachments: HDFS-13045.000.patch, HDFS-13045.001.patch,
> HDFS-13045.002.patch
>
>
> Currently, Router directly returns exception response from subcluster to
> client, which may not have the correct error message, especially when the
> error message containing a path.
> One example, we have a mount path "/a/b" mapped to subclusterA's "/c/d". If
> user1 does a chown operation on "/a/b", and he doesn't have corresponding
> privilege, currently the error msg looks like "Permission denied. user=user1
> is not the owner of inode=/c/d", which may confuse user. Would be better to
> reverse the path back to original mount path.
>
>
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