Java EE (Java Enterprise Edition) General Discussion

Hi,

I have been looking for on Google and other forums information about this error, but nothing solution works with my application.

In my JSF Tool, I effort an java.lang.NumberFormatException. When this error is catched, the flow goes to my SecurityFilter class and in the doFilter method I declare a sendRedirect method. But when this is executed I'm only obtain *"java.lang.IllegalStateException: Cannot forward after response has been committed"*

The error is launched when the application is trying lo load a table into a form.

The code is the next:

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
HttpServletResponse resp = (HttpServletResponse) response;

try{
chain.doFilter( request, response );
}
catch(ServletException e){
resp.sendRedirect("/app/error/errorPage.jsf") ; // This line is the executed
return ;
}
catch(Exception e){
resp.sendRedirect("/app/error/errorPage.jsf") ;
}
}

If I write

FacesContext.getCurrentInstance().getExternalContext().redirect("/app/error/errorPage.jsf");

An NullPointerException is catched.

Some clue to solve? Thanks