web.xml:
<error-page>
<error-code>404</error-code>
<location>/error/error_404.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/error/error_500.jsp</location>
</error-page>
<error-page>
<error-code>404</error-code>
<location>/error/error_404.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/error/error_500.jsp</location>
</error-page>