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From "Chuan Liu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5357) Job staging directory owner checking could fail on Windows
Date Fri, 28 Jun 2013 01:30:20 GMT
Chuan Liu created MAPREDUCE-5357:

             Summary: Job staging directory owner checking could fail on Windows
                 Key: MAPREDUCE-5357
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5357
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 3.0.0, 2.1.0-beta
            Reporter: Chuan Liu
            Assignee: Chuan Liu
            Priority: Minor

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.

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