Errors are recorded and jobs appear to be hanging in the Active jobs tab.
After changing an appliance's hostname, RabbitMQ errors are recorded and jobs appear to be hanging in the Active jobs tab.
Resetting the appliance's hostname back to it's original name uvb then rebooting the appliance will resolve any issues encountered.
Note: An enhancement is open that will allow for changing appliance hostnames. This will be included in a future release.