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https://issues.apache.org/jira/browse/HADOOP-8973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13598016#comment-13598016
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Chris Nauroth commented on HADOOP-8973:
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Ivan, thanks for the help tracking this down. Very interesting find. I have
confirmed that the existing tests fail when running as root on Linux, just like
what you're experiencing when running as admin on Windows. It's unrelated to
this patch. This might explain a few complaints I've seen on the mailing lists
from new engineers trying to contribute to Hadoop, but finding some unit tests
failing immediately. I'll try to track down those threads and help them out.
I agree with sticking to the File APIs, because they give us the "absolute
truth" as you said. If the user is root/admin, then the disk is usable.
We're just left with a test issue. We could change the tests to detect
root/admin at runtime and then either skip the invalid tests with
{{assumeTrue}} or run different assertions. On Linux, we could check the
username against "root". On Windows, would it be sufficient to check that user
is "Administrator", or is it more complex than that?
> 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, 1-win
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Attachments: DiskChecker.proto.patch, HADOOP-8973.3.patch,
> HADOOP-8973-branch-1-win.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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