I'm running a server (VPS) with Debian 8.3 (jessie) and systemd manages different processes. The load of the system is below 1, but it uses nearly all memory and some share of swap space. When I try to stop a service and entersystemctl stop process@1the logfile saysMar  1 08:03:50 abcde systemd[1]: Looping too fast. Throttling execution a little.This message appears every second and nothing more happens. When I send ^C to the terminal, the process is finally stopped. The same happens when I try to restart a daemon. Systemd has version: 215-17+deb8u3Why does this message appear and what can I do to shutdown a daemon without this message?
Why does systemd prints Looping too fast and what to do?
systemd;daemon