My research on error page has been done. It was just as simple as by adding following code into web.xml:
< error-code >
< exception-type > java.lang.Throwable < exception-type >
< location > /jsp/MyErrorPage.html < /location >
< /error-code >
The above pieces is to tell the server that whatever shit throwing out, just show MyErrorPage.html, and hiding the meaningless stack trace from users.