[
https://issues.apache.org/jira/browse/HADOOP-8973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592830#comment-13592830
]
Chris Nauroth commented on HADOOP-8973:
---------------------------------------
That's interesting. Yes, I believe this is a bug in the existing code for the
other overload of {{DiskChecker#checkDir}}.
For example, suppose a dfs.datanode.data.dir on the local file system with
owner "foo" and perms set to 700. Now suppose we launch datanode as user
"bar". {{DiskChecker#checkDir}} will just look for 700 and not consider the
running user, so it will think that the directory is usable. Then, it would
experience an I/O error later whenever the process first tries to use that
directory.
I'll file a separate jira for this.
> 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.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.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
