After Upgrade to OH3 MQTT / Mosquitto not working

Setup, Configuration and Use Migration
1

Hello there.
After upgrading from V2.5 to 3 my mqtt broker isn’t working anymore.

Error:
io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: localhost/127.0.0.1:1883

My guess is, that there is a problem connecting to mosquitto. But the service is running. (Checked service status)

Probably the credentials are wrong. Unfortunatly i forgot the username/password I set in those days, so I tried so set it new. But how? Internet tells me to use mosquitto_passwd, but this does not exist in mosquitto 3.1 which OH installed during upgrade.

Any suggesstions? Uninstall and reinstall? Whats the best way to do this?

2

Has Mosquitto also updated itself? Maybe check this: Updating Mosquitto MQTT from 1.x to v2.0+

If this isn’t the issue you’re going to have to provide some more info on how you installed/upgraded openHAB, and how you installed Mosquitto originally.

3

mosquitto
mosquitto708×135 28.5 KB

I once installed mosquitto using openhabian-config.
For the upgrage to OH 3 I used the same.

4

Maybe, if no one has an idea, someone can tell me how to uninstall and reinstall mosquito?

5

Are there any log entries for that service in /var/log/mosquitto/mosquitto.log that may give a hint what is wrong ?