(I hemmed and hawed about whether this goes on the dev or user list; I will start with dev.) I have a StatefulKnowledgeSession that I am trying to serialize using a custom ObjectMarshallingStrategy. However, it appears that the default full serialization strategy is being used instead. Here is the code that I am using: final Marshaller marshaller = MarshallerFactory.newMarshaller(knowledgeBase, new ObjectMarshallingStrategy[] { myStrategy }); assert marshaller != null; final ByteArrayOutputStream baos = new ByteArrayOutputStream(); final ObjectOutputStream oos = new ObjectOutputStream(baos); final DroolsObjectOutputStream doos = new DroolsObjectOutputStream(oos); marshaller.marshall(doos, this.droolsSession); this.data = baos.toByteArray(); My strategy contains System.out.printlns at the moment in the write() and read() methods. They are never invoked. What am I missing, or is this a bug? Best, Laird