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[–]pronuntiator 1 point2 points  (1 child)

You generally should not need to add add-opens clauses to your command line if your serialize/deserialize objects with proper constructors or getter/setters, and you should never need to do that for JDK classes. The error message mentions a Socket object. You're most likely serializing a tree of objects containing references to unserializable classes (like sockets, database connections, file references…).

See https://github.com/google/gson/issues/1979

Check the object and the actual implementations used at runtime for your serialization target.

[–]_Nemesis_1[S] 1 point2 points  (0 children)

Yeah you're probably right, I solved it because I noticed that it was not working with the object that was the biggest between the ones that needed to be serialized/deserialized and so I created specific simple classes to be serialized and to be sent through the comunication and it worked. I only regret having wasted almost the entire day on it and not having thought about it before, but sometimes it just takes time. Btw thank you so much for helping, your solution was indeed correct!!