How to force JSF to resend a request?

I have a random bug in my JSF app that strips all my HTTP parameters. It happens randomly and I can't get any error messages (even when following BalusC's advice here and here).

I can't pinpoint the cause and fix it so I'm wondering if another solution is possile: forcing the request to be resent if all my parameters are empty. Is there a way to make the browser resend its request? For example, through a JSF or HTTP error code.

EDIT: Cleaned up unnecessary code.

In the end, I followed @Xtreme Biker's advice and instead built a filter. It checks if parameters are present, otherwise it sends a redirect response (HTTP error code 307). Then the browser send back the same request which proceeds through.

Something like:

String formWebContainerWidth = httpRequest.getParameter("myParam");
if(formWebContainerWidth == null){

    // SC_TEMPORARY_REDIRECT = 307
    httpResponse.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
    httpResponse.setHeader("Location", httpRequest.getRequestURI()); 
} else {
   chain.doFilter(request, response);
}

EDIT: Added the location, otherwise the browser sometimes displays a "page cannot be reached" error message.