Hello! I just started a custom modpack server, just for a few friends, separate from my main modded server. The specs aren't low-end or high-end, but the CPU usage is around 100% or more even when no one is online.
My other server doesn't have this problem, and the modpack contains mostly the same mods, and no really intensive ones.
The total tick time is under 2 ms, so there is almost no load.
I use Java 8 (not by choice, the mods required it), Linux (obviously), and Cauldron, but it also happens with vanilla Forge.
I have run JMX CPU profiling and samples with no clues. I also tested a pure vanilla 1.8 server and the load does not occur, CPU usage is 1.2% when idle.
Any suggestions, or am I missing something obvious?
And here is the server modlist: