Hi I have a problem with our library and RabbitMQ. Koha version: 21.05.00.000 on Debian 9.13 During the latest update just tonight .... Setting up koha-common (21.05.00-1) ... Upgrading database schema for library <== this instance is disabled Upgrading database schema for libtest2 <== this instance is running OK Plugin configuration unchanged. .... Applying plugin configuration to rabbit@asf3... failed. * Could not contact node rabbit@asf3. Changes will take effect at broker restart. * Options: --online - fail if broker cannot be contacted. --offline - do not try to contact broker. Job for rabbitmq-server.service failed because the control process exited with error code. See "systemctl status rabbitmq-server.service" and "journalctl -xe" for details. systemctl shows rabbitmq service is not running and it cannot start because: # cat /var/log/rabbitmq/startup_log ERROR: node with name "rabbit" already running on "asf3" and in the intranet About Koha / System Information for instance libtest2 says: Impossible to connect to the message broker There is an error when trying to connect to the message broker (RabbitMQ), check the Koha log files. Maybe it is not installed and configured correctly? Contact your system administrator. In /etc/rabbitmq/rabbitmq-env.conf all options are commented out. When this instance was installed last year there was nothing that suggested that this needed to be configured. I also see in worker-output.log I'm getting: Error connecting to localhost:61613: Connection refused at /usr/share/perl5/Net/Stomp.pm line 26. I'm not sure if this is a firewall issue or not. I am running the stock Debian fail2ban. Thanks -- Mike