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From "Colin Patrick McCabe (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3206) oev: miscellaneous xml cleanups
Date Thu, 05 Apr 2012 22:02:22 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13247748#comment-13247748
] 

Colin Patrick McCabe commented on HDFS-3206:
--------------------------------------------

Hi Bikras,

The edit log reflects changes to the image, not the contents of the image themselves.  It's
a series of deltas.  So it is quite possible to have an OP_SET_OWNER that contains no user
name, despite the fact that all files have an owning user associated with them.  It just means
that at some point, someone changed the group in which the file resides, without changing
the owner at the same time.
                
> oev: miscellaneous xml cleanups
> -------------------------------
>
>                 Key: HDFS-3206
>                 URL: https://issues.apache.org/jira/browse/HDFS-3206
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Colin Patrick McCabe
>            Assignee: Colin Patrick McCabe
>            Priority: Minor
>         Attachments: HDFS-3206.001.patch
>
>
> * SetOwner operations can change both the user and group which a file or directory belongs
to, or just one of those.  Currently, in the XML serialization/deserialization code, we don't
handle the case where just the group is set, not the user.  We should handle this case.
> * consistently serialize generation stamp as GENSTAMP.

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