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From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9652) RawLocalFs#getFileLinkStatus does not fill in the link owner and mode
Date Mon, 29 Jul 2013 22:55:49 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13723094#comment-13723094
] 

Andrew Wang commented on HADOOP-9652:
-------------------------------------

Let's just revert, this has caused way more fallout than I thought. I've tracked down most
of the issues so far, but it seems cleaner to just do a single fixed patch than all these
little JIRAs.

I'll also kick off full-project test builds on my own for future patches to this JIRA, because
apparently the common tests are lacking here.
                
> RawLocalFs#getFileLinkStatus does not fill in the link owner and mode
> ---------------------------------------------------------------------
>
>                 Key: HADOOP-9652
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9652
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Colin Patrick McCabe
>            Assignee: Andrew Wang
>             Fix For: 2.3.0
>
>         Attachments: hadoop-9452-1.patch, hadoop-9652-2.patch, hadoop-9652-3.patch
>
>
> {{RawLocalFs#getFileLinkStatus}} does not actually get the owner and mode of the symlink,
but instead uses the owner and mode of the symlink target.  If the target can't be found,
it fills in bogus values (the empty string and FsPermission.getDefault) for these.
> Symlinks have an owner distinct from the owner of the target they point to, and getFileLinkStatus
ought to expose this.
> In some operating systems, symlinks can have a permission other than 0777.  We ought
to expose this in RawLocalFilesystem and other places, although we don't necessarily have
to support this behavior in HDFS.

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