4.0.x

Method processDispatchResult(HttpServletRequest request, HttpServletResponse response,
			HandlerExecutionChain mappedHandler, ModelAndView mv, Exception exception) throws Exception of DispatchServlet maybe has a bug. 

code block :
```java
if (mappedHandler != null) {
			mappedHandler.triggerAfterCompletion(request, response, null);
		}
```
The exception parameter is null? then interceptor is can not get the exception of handler.