Minor Description
I noticed that when using a multi-threaded netty-based avro client, the server was only processing one request at a time. This is a problem if processing the request takes time (io wait).
The solution Netty provides is the ExecutionHandler:
http://docs.jboss.org/netty/3.2/api/org/jboss/netty/handler/execution/ExecutionHandler.html
I will attach a patch which allows the user to provide, optionally, such an ExecutionHandler, which is then inserted into the Netty pipeline.
