The Service Manager and the Linux agent are started via systemd. Once the service is stopped via systemctl it also ends the agent all the running child processes.
Release : 12.3.3
Component : AUTOMATION ENGINE
Configuration.
Systemd needs the option KillMode=process which is set to control-group by default.
See also:
https://manpages.debian.org/testing/systemd/systemd.kill.5.en.html