Why my exception class needs to be serialized?

Question

When you extend a class with class Exception ( for creating new exception) you get a warning to have a serialVersionUID. I know that serialVersionUID

Answer 1

If your custom exception is ever used in a distributed application (using RMI, Spring http-invoker, whatever) and can be thrown from a server method that is invoked from a remote client, then the exception will have to be serialized to cross the wire and go to the client.