Issue shutdown sigterm after Plesk Updates every Morning

[mdde]

Hi,

I'm facing an Issue which come along every few Weeks and than this happens 3-4 Days every morning.

After Plesk Update (here at about 6 o Clock in the morning) i only can find "shutdown sigterm Apache" .... Errors and then apache is down and wont restart.

System:

Plesk Onyx 17.5
Debian 8.x

What else can help to find the Problem?

 

[Bitpalast]

Are there no additional error messages in /var/log/messages that precede the error? What is the RAM situation before the shutdown? What is the overall resources situation of the computer?