Wow, that's seriously old software. JSWDK must have come out 10 years ago or so, meaning it's obsolete for about 8 years. Any particular reason you're not using a current version of Tomcat (which is well-documented)?
Joined: Nov 29, 2010
Thanks for the reply.
Yes this is already in production, at this moment i cannot change to some other server.
Joined: Oct 14, 2008
It's 11 years old, actually, which means it's probably vulnerable to all kinds of security problems. Which isn't too bad, because the docs clearly mention that it's meant for "developing and testing", not production use. So it's very different from Tomcat in that regard. Seriously - run, don't walk, to replace it. That shouldn't even be hard, due to the standardization of Servlets and JSPs.
As to the question at hand, why don't you configure a welcome file? I think those were supported in Servlet API 2.1.