This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
but why does it need to go to another servlet anyway?
If all your servlet does is handle the inputs and outputs from the form (like it should do), and you have other java classes doing all the actual work (like you should do),
you can just call the java classes that servlet 2 would be calling, and return from servlet 1.