#supervising process

Supervising process XXX which is not our child Systemd Error

I could see one of process error in systemd “Supervising Process XXX which is not out child”. Did not understand what it mean by supervising process.?

systemctl status shiny-server.service ● shiny-server.service - ShinyServer Loaded: loaded (/etc/systemd/system/shiny-server.service; enabled; vendor preset: disabled) Active: active (running) since Thu 2018-07-05 16:01:23 AEST; 5s ago Process:…