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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 Thu, 23 Jan 2014 23:24:38 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13880505#comment-13880505
] 

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

Sounds good to me, thanks Jason. I'm honestly okay with reverting symlink
support for local filesystem entirely since they seem to be more trouble
than they're worth, but that's a discussion we can have at a later time.



> 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: Colin Patrick McCabe
>             Fix For: 2.4.0
>
>         Attachments: 0001-temporarily-disable-HADOOP-9652.patch, hadoop-9452-1.patch,
hadoop-9652-2.patch, hadoop-9652-3.patch, hadoop-9652-4.patch, hadoop-9652-5.patch, hadoop-9652-6.patch,
hadoop-9652-workaround.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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