About 2 weeks after deploying the DRaaS Connectors to our Protected Site, they suddenly went offline and complained that “controller_init.py failed, dropping in to debug shell“, we tried a normal reboot but unfortunately it came back up with the same error…

It appears that simply rebooting the VM was insufficient to restore the OVF properties. To bring the Connector back up we had to complete a full Power Off followed by a Power On

So yes, embarrassingly we needed to….