Spring A NullPointerException for HandlerMapping

if you don't register any viewcontrollers, you might get a null here:

org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport#viewControllerHandlerMapping

    @Bean
    @Nullable
    public HandlerMapping viewControllerHandlerMapping() {
        ViewControllerRegistry registry = new ViewControllerRegistry(this.applicationContext);
        addViewControllers(registry);

        AbstractHandlerMapping handlerMapping = registry.buildHandlerMapping();
        if (handlerMapping == null) {
            return null;
        }
        handlerMapping.setPathMatcher(mvcPathMatcher());
        handlerMapping.setUrlPathHelper(mvcUrlPathHelper());
        handlerMapping.setInterceptors(getInterceptors());
        handlerMapping.setCorsConfigurations(getCorsConfigurations());
        return handlerMapping;
    }

but when we iterate over a handlerMappings , 'mapping ' might be null: org.springframework.web.servlet.DispatcherServlet#getHandler

    @Nullable
    protected HandlerExecutionChain getHandler(HttpServletRequest request) throws Exception {
        if (this.handlerMappings != null) {
            for (HandlerMapping mapping : this.handlerMappings) {
                HandlerExecutionChain handler = mapping.getHandler(request);
                if (handler != null) {
                    return handler;
                }
            }
        }
        return null;
    }

so I'm going to get an exception.

Comment From: rstoyanchev

I can't reproduce it this. It shouldn't be possible and if it was, it would have been reported long ago. If you actually have this issue please provide a sample to demonstrate it.