I have reverted to kernel 13.13.0-49-generic as suggested here Native mono crashes [kernel fix released] and it is still the same issue. I’ve had start nzbdrone twice in the last 20 minutes
Intel Core i7-3930k Hexa Core
Ubuntu 14.04.2 Trusty
Kernel: 3.13.0-49-generic
Sonarr: 2.0.0.3113 develop
Mono: 3.10.0
Error
EPIC FAIL: Object reference not set to an instance of an object: Object reference not set to an instance of an object
System.NullReferenceException: Object reference not set to an instance of an object
at System.Threading.EventWaitHandle.Reset () [0x00000] in <filename unknown>:0
at (wrapper remoting-invoke-with-check) System.Threading.EventWaitHandle:Reset ()
at System.Threading.Timer+Scheduler.SchedulerThread () [0x00000] in <filename unknown>:0
at System.Threading.Thread.StartInternal () [0x00000] in <filename unknown>:0