[MAPREDUCE-5210] Job submission has strict permission validation

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: samar
• Reporter: Amareshwari Sriramadasu
• Created: 06/May/13 08:24
• Updated: 09/May/13 20:23

Description

The following code in JobSubmissionFiles.java mandates strict permission on job submission :

    if (fs.exists(stagingArea)) {
      FileStatus fsStatus = fs.getFileStatus(stagingArea);
      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);
      }

For file systems such as S3, which do not have permission concept, user can never submit a job with staging area in S3.

Issue Links

• blocks: HADOOP-9554 Introduce a api to check if authorization is supported by the FS