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Posted to common-issues@hadoop.apache.org by "Andrew Wang (JIRA)" <ji...@apache.org> on 2013/02/28 01:13:13 UTC

[jira] [Commented] (HADOOP-9337) org.apache.hadoop.fs.DF.getMount() does not work on Mac OS

    [ https://issues.apache.org/jira/browse/HADOOP-9337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13588949#comment-13588949 ] 

Andrew Wang commented on HADOOP-9337:
-------------------------------------

Hi Ivan,

I think we should stick with the (b) option, since that's what we already use for handling other Unixes (e.g. AIX).

Also, could you add a unit test for MacOS to {{TestDFVariations}}?
                
> org.apache.hadoop.fs.DF.getMount() does not work on Mac OS
> ----------------------------------------------------------
>
>                 Key: HADOOP-9337
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9337
>             Project: Hadoop Common
>          Issue Type: Bug
>         Environment: Mac OS 10.8
>            Reporter: Ivan A. Veselovsky
>            Assignee: Ivan A. Veselovsky
>         Attachments: HADOOP-9337--a.patch, HADOOP-9337--b.patch
>
>
> test org.apache.hadoop.fs.TestLocalFileSystem.testReportChecksumFailure() (added in HADOOP-9067) appears to fail on MacOS because 
> method org.apache.hadoop.fs.DF.getMount() does not work correctly.
> The problem is that "df -k <path>" command returns on MacOS output like the following:
> -------
> Filesystem   1024-blocks      Used Available Capacity  iused    ifree %iused  Mounted on
> /dev/disk0s4   194879828 100327120  94552708    52% 25081778 23638177   51%   /Volumes/Data
> -------
> while the following is expected:
> -------
> Filesystem         1024-blocks      Used Available Capacity Mounted on
> /dev/mapper/vg_iveselovskyws-lv_home 420545160  15978372 383204308       5% /home
> -------
> So, we see that Mac's output has 3 additional tokens.
> I can suggest 2 ways to fix the problem.
> (a) use "-P" (POSIX) option when invoking df command. This will probably ensure unifirm output on all Unix systems;
> (b) move Mac branch to specific "case" branch and treat it specifically (like we currently have for AIX, DF.java, line 214)

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