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https://issues.apache.org/jira/browse/HDFS-15979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17407375#comment-17407375
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Ahmed Hussein commented on HDFS-15979:
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Hi [~weichiu], Are you okay with the changes in this Jira? or do you still have
any concerns?
> Move within EZ fails and cannot remove nested EZs
> -------------------------------------------------
>
> Key: HDFS-15979
> URL: https://issues.apache.org/jira/browse/HDFS-15979
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: encryption, hdfs
> Reporter: Ahmed Hussein
> Assignee: Ahmed Hussein
> Priority: Major
> Labels: pull-request-available
> Attachments: HDFS-15979.001.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Moving between EZ directories should work fine if the EZ key for the
> directories is identical. If the key is name identical then no
> decrypt/re-encrypt is necessary.
> However, the rename operation checks more than the key name. It compares the
> inode number (unique identifier) of the source and dest dirs which will never
> be the same for 2 dirs resulting in the cited failure. Note it also
> incorrectly compares the key version.
> A related issue is if an ancestor of a EZ share the same key (ie.
> /projects/foo and /projects/foo/bar/blah both use same key), files also
> cannot be moved from the child to a parent dir, plus the child EZ cannot be
> removed even though it's now covered by the ancestor.
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