java.io.StreamCorruptedException: invalid type code: AC error?

Question

We are using TCP object streams and this error popped up, what's causing it?

Answer 1

This error occurs if you are creating an input stream or output stream on either the client or server communication classes more than once. You should only create each once once.

Comments

More specifically, the issue occurs if you are using TCP and creating a new ObjectInputStream or ObjectOutputStream for the same socket's input stream or outputstream more than once.

Each socket should have just ONE ObjectInputStream and ObjectOutputStream associated with it!