Snapshot Server 14w32d Crashes after players join

Execute server bat file which loads server, no issues found during the spawning of the map.

On client side load server and get to the Downloading Terrain screen and then it will error out with the following error:

internal exception io.netty.handler.timeout.readtimeoutexception

The client will then quit and the log from the server console will crash with the following crash log attached.

I have tried this using 3 different servers and 3 different clients and the problem is always the same.