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https://issues.apache.org/jira/browse/HADOOP-8973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13597336#comment-13597336
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Chris Nauroth commented on HADOOP-8973:
---------------------------------------
{quote}
If java 7 File.canWrite etc are going to work on Windows (like mentioned in
some comments above) then we could enable the API path when (!Windows or
Java>6).
{quote}
Sorry, let me clarify the Java 7 situation. Java 7 does not fix the bugs in
java.io.File canRead/canWrite/canExecute. Instead, it adds new methods that
are very similar in {{java.nio.file.Files}}, and these new methods are the ones
that correctly handle ACLs:
http://docs.oracle.com/javase/7/docs/api/java/nio/file/Files.html
I'm not sure why they didn't just fix the bugs in {{java.io.File}}, but that's
the way it is. This means that it wouldn't be correct to do if (JDK7) then use
File methods. We have to wait for Hadoop as a whole go to JDK7 (for compile
time, not just runtime) and migrate the {{DiskChecker}} code to use the new
APIs. Unfortunately, we can't do anything right now in this patch to prepare
for that.
The old Sun bug report has some relevant discussion:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6203387
{quote}
Please do open a jira to fix this issue in branch-1-win too.
{quote}
Actually, I was planning on doing this in scope of the current jira. I just
wanted to get buy-in on the trunk patch first. I expect to have the branch-1
patch ready later today.
> 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: 3.0.0
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Attachments: HADOOP-8973.3.patch,
> 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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