I have a Game Server made using Undertow WebSockets, which worked fine with Java 9, and is giving me problem with Java 11 (openjdk), on Centos 8.

I profiled the server using JProfiler and the problematic method is different in 2.0.20.Final and in 2.0.29.Final, I'll attach screenshots of both.

In 2.0.20 it's SSLEngineImpl.wrap()
In 2.0.29 it's WebSocketChannel.lastDataRead()

EDIT: See first comment.