Shelly bindig throwing exception IP_MULTICAST_IF: address not bound to any interface

Add-ons Bindings
1

Hi,

shelly binding is keep throwing the following exception:
2020-12-04 08:22:23.264 [ERROR] [.eclipse.californium.core.CoapClient] - could not set and start client endpoint
java.net.SocketException: bad argument for IP_MULTICAST_IF: address not bound to any interface
at java.net.PlainDatagramSocketImpl.socketSetOption0(Native Method) ~[?:?]
at java.net.PlainDatagramSocketImpl.socketSetOption(PlainDatagramSocketImpl.java:91) ~[?:?]
at java.net.AbstractPlainDatagramSocketImpl.setOption(AbstractPlainDatagramSocketImpl.java:352) ~[?:?]
at java.net.MulticastSocket.setInterface(MulticastSocket.java:477) ~[?:?]
at org.eclipse.californium.elements.UdpMulticastConnector.start(UdpMulticastConnector.java:83) ~[bundleFile:?]
at org.eclipse.californium.core.network.CoapEndpoint.start(CoapEndpoint.java:506) ~[bundleFile:?]
at org.eclipse.californium.core.CoapClient.setEndpoint(CoapClient.java:356) [bundleFile:?]
at org.openhab.binding.shelly.internal.coap.ShellyCoapHandler.start(ShellyCoapHandler.java:118) [bundleFile:?]
at org.openhab.binding.shelly.internal.handler.ShellyBaseHandler.initializeThing(ShellyBaseHandler.java:276) [bundleFile:?]
at org.openhab.binding.shelly.internal.handler.ShellyBaseHandler.lambda$0(ShellyBaseHandler.java:158) [bundleFile:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) [?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at java.lang.Thread.run(Thread.java:834) [?:?]

Because of that, in the rules the event detection is no working.

Any idea how to fix it?

Thanks

2

in linux one enables an interface, named, say, eth0, for multicast with

ip route add 224.0.0.0/4 dev eth0

not sure if this helps

3

good idea, now I managed to get rid of that error by rebooting openhab, but if I will see it again (and that happened before already) I will try this!