PayloadApplicationEvent can't hit cache [SPR-13543]

[spring-projects-issues]

bohr.qiu opened SPR-13543 and commented

PayloadApplicationEvent dont implement hashcode and equals，when publish event，org.springframework.context.event.AbstractApplicationEventMulticaster#getApplicationListeners(org.springframework.context.ApplicationEvent, org.springframework.core.ResolvableType) method can’t hit the cache。

cache key is ListenerCacheKey，

---

Affects: 4.2.1

Issue Links:

• OutOfMemory Exception when publishing User Events [SPR-13540] #18116 OutOfMemory Exception when publishing User Events

[spring-projects-issues]

bohr.qiu commented

test code listener :

@EventListener
public void handle(PoEvent poEvent) {
logger.info("{}", poEvent);
}

public static class PoEvent {
    private String msg;

    public PoEvent(String msg) {
        this.msg = msg;
    }
}

publish:

@Test
public void testPublish() throws Exception {
publisher.publishEvent(new EventListeners.PoEvent("xxxx"));
publisher.publishEvent(new EventListeners.PoEvent("xxxx"));
}

[spring-projects-issues]

Juergen Hoeller commented

This seems to be a variant of #18116, which has been addressed already. Please give the latest 4.2.2.BUILD-SNAPSHOT a try...

Juergen