IllegalArgumentException when using AnnotationUtils.findAnnotation [SPR-13634]

[spring-projects-issues]

Rossen Stoyanchev opened SPR-13634 and commented

java.lang.IllegalArgumentException: interface org.springframework.messaging.simp.annotation.SendToUser is not visible from class loader
	at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:616)
	at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:592)
	at java.lang.reflect.WeakCache$Factory.get(WeakCache.java:244)
	at java.lang.reflect.WeakCache.get(WeakCache.java:141)
	at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:455)
	at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:738)
	at org.springframework.core.annotation.AnnotationUtils.synthesizeAnnotation(AnnotationUtils.java:1280)
	at org.springframework.core.annotation.AnnotationUtils.findAnnotation(AnnotationUtils.java:500)
	at org.springframework.core.annotation.AnnotationUtils.findAnnotation(AnnotationUtils.java:561)
	at org.springframework.messaging.handler.HandlerMethod.getMethodAnnotation(HandlerMethod.java:214)
	at org.springframework.messaging.handler.HandlerMethod$HandlerMethodParameter.getMethodAnnotation(HandlerMethod.java:275)
	at org.springframework.messaging.simp.annotation.support.SendToMethodReturnValueHandler.supportsReturnType(SendToMethodReturnValueHandler.java:136)

---

Affects: 4.2 GA

Issue Links:

• SynthesizedAnnotation is not visible from class loader [SPR-13696] #18271 SynthesizedAnnotation is not visible from class loader

[spring-projects-issues]

Rossen Stoyanchev commented

Link to original report:
rstoyanchev/spring-websocket-portfolio#60

[spring-projects-issues]

Juergen Hoeller commented

AnnotationUtils was using the default ClassLoader for the creation of synthesized annotation proxies, which depends on the thread-context ClassLoader or on all jars sharing the same framework ClassLoader. The more reliable choice is to use the ClassLoader that the original annotation has been declared in, which we're doing as of 4.2.3 now.

Juergen