Serveral services are shut down. In the logfiles you find a clean shutdown of these services.
UCS lower 4.4-7 errata869 and 870
Reported only from school environment may also happen in non school environment.
High load on the system.
Only Python 2.7 services are affected.
Update your system up to or higher than 4.4-7 errata 870
There was a killall call for years in the code that was never triggered until servers, mostly in school environments, had a very high load in the last month. We corrected this in that two errata updates.