what i want is when response.redirect() is failed due to error then the exceptionHandler.jsp should be called
When the above case occurs it causes http 404 error. By default when the 404 error occurs, server shows the default 404 error page.
We can use the custom page for displaying http 404 by defining it in web xml.
In your case you can call the "exceptionHandler.jsp" page when 404 error occurs.