[jira] Assigned: (HADOOP-4368) Superuser privileges required to do "df"

["Doug Cutting (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-4368?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Doug Cutting reassigned HADOOP-4368:
------------------------------------

    Assignee: Craig Macdonald

This is looking good.  A few nits:
 - FsStatus should not be nested, but rather a standalone class.
 - FsStatus needs Javadoc.
 - We should add a unit test for this new public API (you're welcome, Nigel).  This should be as new test methods in existing unit test classes.


> Superuser privileges required to do "df"
> ----------------------------------------
>
>                 Key: HADOOP-4368
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4368
>             Project: Hadoop Core
>          Issue Type: Wish
>          Components: contrib/fuse-dfs, dfs
>    Affects Versions: 0.18.1
>            Reporter: Brian Bockelman
>            Assignee: Craig Macdonald
>            Priority: Minor
>         Attachments: fuse_statfs.patch, fuse_statfs_trunk.patch, hadoop4368.fsstatus.patch
>
>   Original Estimate: 0.17h
>  Remaining Estimate: 0.17h
>
> super user privileges are required in DFS in order to get the file system statistics (FSNamesystem.java, getStats method).  This means that when HDFS is mounted via fuse-dfs as a non-root user, "df" is going to return 16exabytes total and 0 free instead of the correct amount.
> As far as I can tell, there's no need to require super user privileges to see the file system size (and historically in Unix, this is not required).
> To fix this, simply comment out the privilege check in the getStats method.

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