This prints on start-up. The server runs fine as far as I can tell, but its a bit curious. Found this: https://github.com/netty/netty/blob/master/common/src/main/java/io/netty/util/internal/PlatformDependent.java

I know nothing about Netty, so I didn't know what to do with that.

io.netty.util.internal.PlatformDependent <clinit>
INFO: Your platform does not provide complete low-level API for accessing direct buffers reliably. Unless explicitly requested, heap buffer will always be preferred to avoid potential system unstability.