I try to kill NzbDrone and restart the process, but I end up with a zombie’d mono process and then NzbDrone refuses to restart because the port it wants to use is locked by the zombie process. The ONLY way to get NzbDrone started again is to reboot the system. And that requires a hard restart because Debian won’t restart from command line.
I can close just about every process and service I want, but because of the zombie process, it simply refuses to reboot OR shutdown from the commandline - I have to power cycle the server.