mosquitto running as service does not work but manually does

Question

if I run mosquitto manually mosquitto

i can connect to it and everything works perfectly

but if I run mosquitto as a service sudo service mosquitto start

then it doesen't respond and nothing works even though sudo service mosquitto status says its active

am I doing something wrong?

Answer 1

cd /var/lib/mosquitto
sudo rm mosquitto.db
sudo reboot

--> and everything was fine again...