DefaultHandlerExceptionResolver::doResolveException no longer returns ModelAndView customized via protected method

[ryber]

Impacted Version: spring-webmvc-6.0.4

Previously

DefaultHandlerExceptionResolver::doResolveException(HttpServletRequest request, HttpServletResponse response, @Nullable Object handler, Exception ex)

would return the ModelAndView when it was resolved from one of the specific methods (like handleHttpRequestMethodNotSupported)

Starting with 6, this method now sets a local variable of the ModelAndView and then does NOT return it. It ALWAYS returns null. in these cases.

see https://github.com/spring-projects/spring-framework/blob/main/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/support/DefaultHandlerExceptionResolver.java#L167-L248

[rstoyanchev]

I presume the case is when you override a protected method to handle an exception, and return a ModelAndView rather than calling response#sendError, then the resulting ModelAndView is being ignored?

[ryber]

yes, well, specifically I'm getting a NullPointerException because I am expecting it to be returned

[ryber]

for now I have copied in the method from Spring 5 as a workaround