Right, the DEBUG log is from a different situation.
I am having the warnings all the time, i.e.:
13:28:38.470 [INFO ] [smarthome.event.ThingUpdatedEvent ] - Thing ‘zwave:device:159b6a25ebb:node2’ has been updated.
13:48:40.981 [ERROR] [ocol.ZWaveController$ZWaveSendThread] - NODE 2: Timeout while sending message. Requeueing - 2 attempts left!
13:48:40.987 [ERROR] [l.serialmessage.SendDataMessageClass] - NODE 2: Got an error while sending data. Resending message.
13:48:45.998 [ERROR] [ocol.ZWaveController$ZWaveSendThread] - NODE 2: Timeout while sending message. Requeueing - 1 attempts left!
13:48:46.013 [ERROR] [l.serialmessage.SendDataMessageClass] - NODE 2: Got an error while sending data. Resending message.
13:48:51.016 [ERROR] [ocol.ZWaveController$ZWaveSendThread] - NODE 2: Timeout while sending message. Requeueing - 0 attempts left!
13:48:51.022 [ERROR] [l.serialmessage.SendDataMessageClass] - NODE 2: Got an error while sending data. Resending message.
13:48:56.028 [WARN ] [ocol.ZWaveController$ZWaveSendThread] - NODE 2: Too many retries. Discarding message: Message: class=SendData[0x13], type=Request[0x00], priority=Get, dest=2, callback=32, payload=02 03 71 04 00
Edit: @chris, I got an exception while exluding and including a device - I will send you the log.