Returning 401 Unauthorized in AuthenticatingFilter

[evega]

I am working on a X509AuthenticationFilter which extends
AuthenticatingFilter.  If there is a problem I want to return a  401
Unauthorized. If I try the following I get a HTTP ERROR 500. Is there any
way to get it to return a 401?

 @Override
    protected AuthenticationToken createToken(ServletRequest request,
            ServletResponse response) throws Exception {
        
            
            throw new UnauthenticatedException("DDDDDD");
          

}



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