If the following looks familiar then show me your code I might be able to
help more... but... I had a similar error to this a while ago that was based
on this code in my .jsp file.
jsp:useBean id=formHandler class=myPackage.RegisteredUser
scope=request
jsp:setProperty name=formHandler
Notice it appears that getRootCause() is missing from
javax.servlet.ServletException. How can I prove this is not true?
Also notice that the message in the log file is totally different
One technique is to use a classviewer/decompiler. I can't think of a
linux one off the top of my head