1 Reply Latest reply on Jan 8, 2019 9:13 AM by anistor

    How to use UnknownFieldSet with ProtoStream




      I'd like to use ProtoStream for serialization between Client and Server Infinispan. So I annotated the classes with @ProtoMessage and @ProtoField to generate the proto file and the marshallers.

      I also tried to use @UnknownFieldSet to handle data model changes. But I've got the following error when the client with version 1 read the data written by the client version 2 (one field is added in version 2)

      java.lang.IllegalAccessError: tried to access class org.infinispan.protostream.impl.UnknownFieldSetImpl from class test.Book$___ProtostreamGeneratedMarshaller2

      Do you have any idea if this is a bug or if I didn't understand how to use @UnknownFieldSet.

      FYI, I used Infinispan 9.4.4 and ProtoStream 4.2.2.





      I activated level Trace to have the code of the generated marshaller and I found:



                     org.infinispan.protostream.UnknownFieldSet u = o.getUnknown();

                     if (u == null) u = new org.infinispan.protostream.impl.UnknownFieldSetImpl();

                     if (!u.readSingleField(tag, $2)) done = true;

                     if (!u.isEmpty()) o.setUnknown(u);


      The error is clear, the class UnknownFieldSetImpl is not public.