[HADOOP-2427] Cleanup of mapred.local.dir after maptask is complete

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.15.1
• Fix Version/s: 0.18.0
• Hadoop Flags: Reviewed
• Release Note: The current working directory of a task, i.e. ${mapred.local.dir}/taskTracker/jobcache/<jobid>/<task_dir>/work is cleanedup, as soon as the task is finished.
• Assignee: Amareshwari Sriramadasu
• Reporter: Lohit Vijaya Renu
• Created: 14/Dec/07 07:32
• Updated: 08/Jul/09 16:52
• Resolved: 05/Jun/08 04:14

Description

I see that after a map task is complete, its working directory (mapred.local.dir)/taskTracker/jobcache/<jobid>/<task_dir> is not deleted untill the job is complete. If map out files are stored in there, could this be created in different directory and the working directory cleaned up after map task is complete. One problem we are seeing is, if a map task creates files temporary files, they get accumulated and we may run out of disk space thus failing the job. Relying on the user to cleanup all temp files created is be error prone.

Issue Links

• is related to: HADOOP-3431 hadoop streaming should kill all children processes on task failure
• relates to: MAPREDUCE-46 mapred/local/jobTracker is not cleanup correctly