mesos/spark — pull request #405 by JoshRosen (2013-01-23 07:11:44+00:00)
Title: Add test for driver hanging on exit (SPARK-530)

This adds a test case to detect if a driver cannot exit due to non-daemon threads. I wrote this as a test case for [SPARK-530](https://spark-project.atlassian.net/browse/SPARK-530); I wasn't able to reproduce that issue, but this should prevent us from introducing bugs in the future.