spring 4.2 application event is firing twice with Spring MVC , why?

I am working with Spring 4.2.0.BUILD-SNAPSHOT events , to some reason that I haven't figured out yet,the listener is firing twice after publishing any events whether extending from ApplicationEvent or any arbitrary event, however everything works as expected while running test-cases, now wondering what is going on with annotation-driven events in Spring MVC context

Event publishing Interface

public interface ListingRegistrationService {
    public void registerListing(ListingResource listing);

}

@Component
class ListingRegistrationServiceImpl implements ListingRegistrationService{

    private final ApplicationEventPublisher publisher;

    @Autowired
    public ListingRegistrationServiceImpl(ApplicationEventPublisher publisher) {
        this.publisher = publisher;
    }

    @Override
    public void registerListing(ListingResource listing) {
       //process
        publisher.publishEvent(new ListingCreatedEvent(listing));
        System.out.println("Event above...");
    }

}

Event Listener

@EventListener
    @Async
    public void sendMailForSuggestedListing(Supplier<ListingResource> listingCreatedEvent)  {
        System.out.println("Event fired...");
    }

end-point/entry point

public ResponseEntity<ResponseStatus> registerListing(@RequestBody @Valid ListingResource listing,BindingResult result) throws URISyntaxException {
       ResponseEntity<ResponseStatus> response = null;
       listingService.registerListing(listing); //  publish the event
       response = ResponseEntity.created(new URI(""));
         return response;
            }

Result : Event fired... Event fired... Event above..

I suspect indeed that the EventListener bean is registered twice or something. You can enable org.springframework.context.event.EventListenerMethodProcessor to trace level to check what happens to this particular class.

– Stéphane Nicoll

TRACE org.springframework.context.event.EventListenerMethodProcessorIt is happening twice for everything

12:02:32,878 DEBUG ntext.event.EventListenerMethodProcessor: 138 - 1 @EventListener methods processed on bean 'mailServiceImpl': [public void com.service.MailServiceImpl.sendMailForSuggestedListing(com.service.events.CreationEvent)]
12:02:32,878 DEBUG ntext.event.EventListenerMethodProcessor: 138 - 1 @EventListener methods processed on bean 'mailServiceImpl': [public void com.idrene.emefana.service.MailServiceImpl.sendMailForSuggestedListing(com.service.events.CreationEvent)]
12:02:32,878 TRACE ntext.event.EventListenerMethodProcessor: 132 - No @EventListener annotations found on bean class: class com.service.MetaServiceImpl
12:02:32,878 TRACE ntext.event.EventListenerMethodProcessor: 132 - No @EventListener annotations found on bean class: class com.service.MetaServiceImpl