mesos/spark — pull request #684 by woggle (2013-07-08 19:29:44+00:00)
Title: Explicitly set class loader for MesosSchedulerDriver callbacks.

I think this fixes the issue where people saw ClassNotFoundExceptions from MesosSchedulerBackend.statusUpdate when running Spark master against Mesos. MesosSchedulerBackend callbacks are called from a thread which uses the default ClassLoader rather than inheriting the ClassLoader from the thread from which the scheduler backend is started.