Three issues like this
1)2020-02-24 21:33:41.144 [WARN ] [ing.zwave.handler.ZWaveSerialHandler]
2) 2020-02-24 21:34:05.941 [WARN ] [ing.zwave.handler.ZWaveSerialHandler]
3) 2020-02-24 21:35:31.063 [WARN ]
This is one of them with last zwave debug lines before there is an issue with the serial connection.
2020-02-24 21:33:39.781 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 255: Added 48 to queue - size 25
2020-02-24 21:33:39.781 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 1 out at start. Holdoff false.
2020-02-24 21:33:40.939 [DEBUG] [sactionManager$ZWaveTransactionTimer] - NODE 255: TID 22: Timeout at state WAIT_RESPONSE. 3 retries remaining.
2020-02-24 21:33:40.940 [DEBUG] [sactionManager$ZWaveTransactionTimer] - TID 22: Transaction is current transaction, so clearing!!!
2020-02-24 21:33:40.940 [DEBUG] [e.internal.protocol.ZWaveTransaction] - TID 22: Transaction CANCELLED
2020-02-24 21:33:40.940 [DEBUG] [nal.protocol.ZWaveTransactionManager] - NODE 255: notifyTransactionResponse TID:22 CANCELLED
2020-02-24 21:33:40.940 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction SendNextMessage 0 out at start. Holdoff false.
2020-02-24 21:33:40.941 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 04 00 41 0B B1
2020-02-24 21:33:40.941 [DEBUG] [nal.protocol.ZWaveTransactionManager] - TID 22: Transaction event listener: DONE: CANCELLED →
2020-02-24 21:33:40.941 [DEBUG] [ing.zwave.handler.ZWaveSerialHandler] - NODE 255: Sending REQUEST Message = 01 04 00 41 0B B1
2020-02-24 21:33:40.942 [DEBUG] [alization.ZWaveNodeInitStageAdvancer] - NODE 26: Node Init response (0) org.openhab.binding.zwave.internal.protocol.ZWaveTransactionResponse@72ce198
> 2020-02-24 21:33:41.144 [WARN ] [ing.zwave.handler.ZWaveSerialHandler] - Got I/O exception Input/output error in writeArray during sending. exiting thread.
2020-02-24 21:33:41.144 [DEBUG] [zwave.handler.ZWaveControllerHandler] - Stopping ZWave network
2020-02-24 21:33:41.144 [DEBUG] [ve.internal.protocol.ZWaveController] - Shutting down ZWave controller
2020-02-24 21:33:41.145 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Shutting down transaction manager
2020-02-24 21:33:41.146 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Exiting ZWave Receive Thread
2020-02-24 21:33:41.146 [DEBUG] [nal.protocol.ZWaveTransactionManager] - Transaction manager shutdown
Half way down Chris suggests an issue with the serial driver or device.
When you are testing with PC Controller are you on same machine so same driver?
Possibly it will fail in this also if left long enough with enough traffic. Possibly try the test program in PC controller to give it some traffic and see if serial fails also.
Something like Z-Wave - Give it time to work but paced to similar to start of openHAB