apache/spark — pull request #800 by aarondav (2014-05-16 00:40:16+00:00)
Title: SPARK-1860: Do not cleanup application work/ directories by default

This causes an unrecoverable error for applications that are running for longer
than 7 days that have jars added to the SparkContext, as the jars are cleaned up
even though the application is still running.