SerializationException: type not included in serializable type set

Question

In my Google Web Toolkit project, I got the following error:

com.google.gwt.user.client.rpc.SerializationException: Type ‘your.class.Type’ was not included in the se

Answer 1

I had the same issue in a RemoteService like this

public List getX(...);

where X is an interface. The only implementation did conform to the rules, i.e. implements Serializable or IsSerializable, has a default constructor, and all its (non-transient and non-final) fields follow those rules as well.

But I kept getting that SerializationException until I changed the result type from List to X[], so

public X[] getX(...);

worked. Interestingly, the only argument being a List, Y being an interface, was no problem at all...