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https://issues.apache.org/jira/browse/HADOOP-9413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615506#comment-13615506
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Bikas Saha commented on HADOOP-9413:
------------------------------------

Chris already has code that does the expected thing for the scenario in which 
the running process is checking whether it has read/write/execute permissions 
on a directory. We could move them into helper functions and use them. This is 
important because after this check is successful the process goes ahead and 
performs the action that depends on the check. So my preference would be to use 
the code that provides the expected functionality. We can improve that code 
later on.
                
> Introduce common utils for File#setReadable/Writable/Executable and 
> File#canRead/Write/Execute that work cross-platform
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9413
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9413
>             Project: Hadoop Common
>          Issue Type: Bug
>            Reporter: Ivan Mitic
>            Assignee: Ivan Mitic
>             Fix For: 3.0.0
>
>         Attachments: HADOOP-9413.commonfileutils.patch
>
>
> So far, we've seen many unittest and product bugs in Hadoop on Windows 
> because Java's APIs that manipulate with permissions do not work as expected. 
> We've addressed many of these problems on one-by-one basis (by either 
> changing code a bit or disabling the test). While debugging the remaining 
> unittest failures we continue to run into the same patterns of problems, and 
> instead of addressing them one-by-one, I propose that we expose a set of 
> equivalent wrapper APIs that will work well for all platforms.
> Scanning thru the codebase, this will actually be a simple change as there 
> are very few places that use File#setReadable/Writable/Executable and 
> File#canRead/Write/Execute (5 files in Common, 9 files in HDFS).
> HADOOP-8973 contains additional context on the problem.

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