gwt-dispatch and com.google.gwt.user.client.rpc.SerializationException
Posted by David Chandler on October 2, 2009
I’d written a new gwt-dispatch ActionHandler with corresponding Action and Result classes and was getting the above exception. The cause turned out be very simple: Action and Result classes implement java.io.Serializable and GWT-RPC therefore requires that they have an empty constructor. So when you get the yellow squiggly in Eclipse that prompts you to generate a serial ID, add an empty constructor, too, and save yourself some grief.