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MapReduce >> mail # user >> Auto clean DistCache?

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Auto clean DistCache?

Each time my MR job is run, a directory is created on the TaskTracker
under mapred/local/taskTracker/hadoop/distcache (based on my

I looked at the directory today, and it's hosting thousands of
directories and more than 8GB of data there.

Is there a way to automatically delete this directory when the job is done?