Sorry, I'm being stupid.
I only checked the server logs, not the fml logs.
Anyway, here's the latest fml log (had to cut it to the last couple of hours because it contains way to much data)
I'm using AT Launcher btw, and Forge version "forge-1.7.10-10.13.4.1492-1.7.10-universal.jar"
Sorry if I'm missing any more info.
It's not really a problem with this, I'm just curious what it is.