In Netty 4 there is no Nio/Epoll/DatagramServerChannel implementation, so there is no way to create a ServerBootstrap which listens to UDP connections.
So, basically my question is the following: Why is there no implementation of such a DatagramServerChannel class?
You're looking for io.netty.channel.socket.nio.NioDatagramChannel
. See QuoteOfTheMomentServer
as example.