Folks - We have some automated tests that run the latest Mesos against the latest Spark, and we've run across a series of issues in both fine, and course grained mode that I believe stem from a series of changes in the 0.21 cycle.
I'm not certain if anyone "owns" this integration, but we should probably ensure it's fixed before we push out 0.21. -- Cheers, Timothy St. Clair Red Hat Inc.
