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.
Thanks I found the DefaultServlet as the root app.
But is there a reason why you have different behavior between deployed applications and root by default? I mean should they just show the same error page if no customization is done?