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https://issues.apache.org/jira/browse/HADOOP-8973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592877#comment-13592877
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Bikas Saha commented on HADOOP-8973:
------------------------------------

Well. In that case, it would be a standard pattern everywhere because 
everywhere code simply checks the value of the permissions and not whether the 
process checking that value actually has the right membership wrt that value. 
Isnt it so? Irrespective of OS.

Also, one can make a case that checkDir(File dir) should end up calling 
checkDir(FileSystem, FilePath, "rwx") instead of duplicating the logic.

                
> DiskChecker cannot reliably detect an inaccessible disk on Windows with NTFS 
> ACLs
> ---------------------------------------------------------------------------------
>
>                 Key: HADOOP-8973
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8973
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: util
>    Affects Versions: trunk-win
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: HADOOP-8973-branch-trunk-win.patch
>
>
> DiskChecker.checkDir uses File.canRead, File.canWrite, and File.canExecute to 
> check if a directory is inaccessible.  These APIs are not reliable on Windows 
> with NTFS ACLs due to a known JVM bug.

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