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https://issues.apache.org/jira/browse/HDFS-13045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16432506#comment-16432506
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Wei Yan commented on HDFS-13045:
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Thanks [~elgoiri] for [^HDFS-13045.003.patch]. Another corner case would be,
the dst appears more than once in the error message, while replaceFirst would
only replace the first one. But here the implementation would be more tricky,
and I don't have a case where the NN would generate such like msg. I'm ok with
current approach, and we can come back if you find other types of unhandled
errors in the future.
> 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, HDFS-13045.003.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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