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Date: Tue, 5 Mar 2013 18:10:13 +0000 (UTC)
From: "Chris Nauroth (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <JIRA.12613366.1351112138652.385029.1362507013475@arcas>
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Subject: [jira] [Updated] (HADOOP-8973) DiskChecker cannot reliably detect
 an inaccessible disk on Windows with NTFS ACLs
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     [ https://issues.apache.org/jira/browse/HADOOP-8973?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chris Nauroth updated HADOOP-8973:
----------------------------------

    Attachment: HADOOP-8973-branch-trunk-win.2.patch

I'm attaching an updated patch.

{quote}
We should skip this call on Windows if it is known to be broken.
{quote}

Each check in the new patch now has this form: if (Windows) then do special check else do File.canRead/canWrite/canExecute, so we bypass the broken File APIs on Windows but still use them on Linux where they are known to work correctly.

{quote}
Does this change the current directory of the calling process?
{quote}

I added a comment explaining that it launches a separate process and does not change the working directory of the current process.

Thanks!

                
> 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.2.patch, 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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