[jira] Created: (MAPREDUCE-896) Users can set non-writable permissions on temporary files for TT and can abuse disk usage.

["Vinod K V (JIRA)" <ji...@apache.org>]

Users can set non-writable permissions on temporary files for TT and can abuse disk usage.
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                 Key: MAPREDUCE-896
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-896
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: tasktracker
            Reporter: Vinod K V


As of now, irrespective of the TaskController in use, TT itself does a full delete on local files created by itself or job tasks. This step, depending upon TT's umask and the permissions set by files by the user, for e.g in job-work/task-work or child.tmp directories, may or may not go through successful completion fully. Thus is left an opportunity for abusing disk space usage either accidentally or intentionally by TT/users.

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