[SOLVED] MQTT2 "Eventbus" Rule only throws error

Im running Openhab 2.4 on a RaspberryPi 3B+ with Openhabian. Im using NodeRed as an alternative Rule Engine and wanted to play around with connecting the two with mqtt instead of the Openhab nodes.
installed Mosquitto through Openhabian and its online and connected to NodeRed and Openhab with the MQTT2 Binding installed. I set everything up according to the section relating to connecting two Openhab instances here https://www.openhab.org/addons/bindings/mqtt.generic/ .
The problem is that when I change an Item in the Group it doesnt publish to mqtt but I get this error:

2019-03-17 12:37:19.383 [ome.event.ItemCommandEvent] - Item 'Schreibtischlampe' received command ON

2019-03-17 12:37:19.400 [nt.ItemStatePredictedEvent] - Schreibtischlampe predicted to become ON

2019-03-17 12:37:19.407 [vent.ItemStateChangedEvent] - Schreibtischlampe changed from OFF to ON

==> /var/log/openhab2/openhab.log <==

2019-03-17 12:37:19.447 [ERROR] [ntime.internal.engine.RuleEngineImpl] - Rule 'Publish all': An error occurred during the script execution: Could not invoke method: org.eclipse.smarthome.binding.mqtt.action.MQTTActions.publishMQTT(org.eclipse.smarthome.core.thing.binding.ThingActions,java.lang.String,java.lang.String) on instance: null

My rule is this:

rule "Publish all"
      Member of AllItems changed
   val actions = getActions("mqtt","mqtt:broker:MQTTBroker")

and Thing file is this

Bridge mqtt:broker:MQTTBroker [ host="localhost", secure=false, username="xxxxxxxxx", password="xxxxxxxxx" ]
        Type publishTrigger : myTriggerChannel "Receive everything" [ stateTopic="allItems/#", separator="#" ]

Schreibtischlampe is the only member off the Group AlIItems right now.
What did I do wrong. This is the first Time I ever used MQTT so I dont really know anything. Did I forget to install something?

triggeringItem.state.toString , perhaps?

1 Like

Thank you @rossko57 that did the trick