File system issues cause logging library exception and scheduler crash.

[warownia1]

File system failure causes the RotatingFileHandler from the logging library to fail with OSError [Errno 9] when attempting to seek or write to a file. The exception happens internally inside the library but it might be possible to add external safeguards which will protect the scheduler process from crashing.

[warownia1]

ZMQQueueListener, which passes log records to the RotatingFileHandler, runs on a separate thread and should not cause main thread crashes. However, we can't let it fail in the background and cause the input queues to block.