ApplicationSessionExpiryFilter never gets called

Question

I have configured a Filter in the web.xml and I have a filter class.  It doesn't seem to be getting called.  I have a page just for the timeout.
public class ApplicationSessionExpiryFilter implements Filter {
    private FilterConfig _filterConfig = null;
    public void init(FilterConfig filterConfig) throws ServletException {
        _filterConfig = filterConfig;
    public void destroy() {
        _filterConfig = null;
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
                                                                                                     ServletException {
        String requestedSession = ((HttpServletRequest)request).getRequestedSessionId();
        String currentWebSession = ((HttpServletRequest)request).getSession().getId();
        boolean sessionOk = currentWebSession.equalsIgnoreCase(requestedSession);
        // if the requested session is null then this is the first application
        // request and "false" is acceptable
        if (!sessionOk && requestedSession != null) {
            // the session has expired or renewed. Redirect request
            ((HttpServletResponse)response).sendRedirect(_filterConfig.getInitParameter("SessionTimeoutRedirect"));
        } else {
            chain.doFilter(request, response);
Please help.  We are already in production

Answer 1

Hi Veena,
Please mention your Jdev version always,
https://www.youtube.com/watch?v=qGDevlbSLcw.
Anyhow, I think this would help you.
Thanks.