java.io.StreamCorruptedException: invalid type code: 00

Question

So basically im writing a client-server multiplayer game. I have a SeverCommunicationThread that creates a gameThread if he receives a RequestForGame creates a gameThread.

Answer 1

This can also happen if the JVM reading the serialized object does not have the correct class/jar files for the object. This usually results in a ClassNotFoundException, but if you have different jar/class versions and the serialVersionUID was not changed between versions, a StreamCorruptedException is produced. (This exception may also be possible if there is a class name conflict. e.g.: a jar containing a different class with the same full class name, though they probably also need the same serilVersionUID).

Check that the client side has the correct versions of jars and class files.