Mine

    def _catchFailure(self, failure):
        exception = failure.trap(error.ConnectionRefusedError)
        print "Error: ", failure.getErrorMessage()
        print "Traceback: ", failure.printDetailedTraceback()
        if issubclass(exception, error.ConnectionRefusedError):
            log.msg('[Monitor, _catchFailure] ConnectionRefusedError')
            reactor.stop()
        else:
            log.msg('Monitor, _catchFailure] Unhandled exception')
            reactor.stop()