Update:
This all happened because of the netflow module which i had activated. Does anyone actually know how the netflow module should be started and configured. (It would be nice stept by step on CentOS 7)?
@theuntergeek and @guyboertje
I'm sorry for adding you in this but guyboertje this is a information problem look at:
When I deactivate the netflow module i recieve the filebeat notfications. So the question is, how to start and configure the netflow module.