[Ardour-Users] What are the jackd errors, related to 'graph' ?

[jonetsu]

Hello, 

What is the nature of the jackd errors such as this one.  The above
lines are normal execution, then these three lines appear after a
failure in the DAW/plugin:

JackPosixSemaphore::TimedWait err = Connection timed out

JackFreewheelDriver::ProcessSync: SuspendRefNum error

JackAudioDriver::ProcessGraphSync: ProcessWriteSlaves error, engine
may now behave abnormally!!

Thanks.