apache/spark — pull request #3851 by brennonyork (2014-12-31 00:03:33+00:00)
Title: [SPARK-794][Core] Remove sleep() in ClusterScheduler.stop

Removed `sleep()` from the `stop()` method of the `TaskSchedulerImpl` class which, from the JIRA ticket, is believed to be a legacy artifact slowing down testing originally introduced in the `ClusterScheduler` class.