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https://issues.apache.org/jira/browse/HDFS-4818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681610#comment-13681610
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Chuan Liu commented on HDFS-4818:
---------------------------------

+1

There are quite a few places Chis's change not only fixed the failures but also 
make the tests more robust as well!
                
> several HDFS tests that attempt to make directories unusable do not work 
> correctly on Windows
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-4818
>                 URL: https://issues.apache.org/jira/browse/HDFS-4818
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode, test
>    Affects Versions: 3.0.0
>            Reporter: Chris Nauroth
>            Assignee: Chris Nauroth
>         Attachments: HDFS-4818.1.patch
>
>
> Several tests set restrictive permissions on the name directories to simulate 
> disk failure and verify that the namenode can still function with one of 
> multiple name directories out of service.  These permissions do not restrict 
> access as expected on Windows.

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