How to reduce the load on the processor if the Netty network engine?

Question

Java

Hi all!
There is a game project with ~1500 people online, everything is managed by a heavily modified version of BungeeCord .
I recently started having issues with cpu load. Added profiler.

Google showed only an ancient bug from 2007 (Old version of netty)
Maybe you met? Is there a way to reduce the load?

Answer 1

Recently it was
https://habrahabr.ru/post/277695/