getRequestDispatcher « Request « JSP-Servlet Q&A

1. getRequestDispatcher and FQDN

is there a way to use request.getRequestDispatcher with a FQDN? Something like

If I try it, I get the error
JSPG0036E: Failed to find resource /http:/
I need to forward it outside ...

2. is request.getRequestDispatcher.forward() asynchronous?

When I called one servlet from another inside single if statement I was shocked, that even if my forwarding method was called the flow didnt stopped and next methods were invoked ...