GWT - occasional com.google.gwt.user.client.rpc.SerializationException

Question

we are haunted by occasional occurences of exceptions such as:

com.google.gwt.user.client.rpc.SerializationException: Type \'xxx\' was not assignable

Answer 1

I had the same problem and I found a solution from another person:

"There is a possibility that you have a class which implements Serializable and you have an attribute field within that class which is not Serializable hence you might be getting this exception."

Many thanks to that person :)

My advice is to make all fields (which are not primitive types) in your class to implement Serializable also! This solved my problem.