[MAPREDUCE-5357] Job staging directory owner checking could fail on Windows

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.0-beta, 3.0.0-alpha1
• Fix Version/s: 2.1.0-beta
• Target Version/s: 2.1.0-beta
• Hadoop Flags: Reviewed
• Assignee: Chuan Liu
• Reporter: Chuan Liu
• Created: 28/Jun/13 01:30
• Updated: 12/May/16 18:22
• Resolved: 03/Jul/13 05:49

Description

In JobSubmissionFiles.getStagingDir(), we have following code that will throw exception if the directory owner is not the current user.

      String owner = fsStatus.getOwner();
      if (!(owner.equals(currentUser) || owner.equals(realUser))) {
         throw new IOException("The ownership on the staging directory " +
                      stagingArea + " is not as expected. " +
                      "It is owned by " + owner + ". The directory must " +
                      "be owned by the submitter " + currentUser + " or " +
                      "by " + realUser);
      }

This check will fail on Windows when the underlying file system is LocalFileSystem. Because on Windows, the default file or directory owner could be "Administrators" group if the user belongs to "Administrators" group.

Quite a few MR unit tests that runs MR mini cluster with localFs as underlying file system fail because of this.

Issue Links

• breaks: MAPREDUCE-5483 revert MAPREDUCE-5357
• is part of: MAPREDUCE-4401 Enhancements to MapReduce for Windows Server and Windows Azure development and runtime environments