EventListenerMethodProcessor defensively handles unresolvable method signatures

Issue: SPR-14330
(cherry picked from commit f657952)

Author: jhoeller

spring-context/src/main/java/org/springframework/context/event/EventListenerMethodProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2016 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,6 +41,7 @@
 import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 import org.springframework.core.annotation.AnnotationUtils;
 import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
 
 /**
  * Register {@link EventListener} annotated method as individual {@link ApplicationListener}
@@ -124,14 +125,23 @@ protected List<EventListenerFactory> getEventListenerFactories() {
 
 	protected void processBean(final List<EventListenerFactory> factories, final String beanName, final Class<?> targetType) {
 		if (!this.nonAnnotatedClasses.contains(targetType)) {
-			Map<Method, EventListener> annotatedMethods = MethodIntrospector.selectMethods(targetType,
-					new MethodIntrospector.MetadataLookup<EventListener>() {
-						@Override
-						public EventListener inspect(Method method) {
-							return AnnotationUtils.findAnnotation(method, EventListener.class);
-						}
-					});
-			if (annotatedMethods.isEmpty()) {
+			Map<Method, EventListener> annotatedMethods = null;
+			try {
+				annotatedMethods = MethodIntrospector.selectMethods(targetType,
+						new MethodIntrospector.MetadataLookup<EventListener>() {
+							@Override
+							public EventListener inspect(Method method) {
+								return AnnotationUtils.findAnnotation(method, EventListener.class);
+							}
+						});
+			}
+			catch (Throwable ex) {
+				// An unresolvable type in a method signature, probably from a lazy bean - let's ignore it.
+				if (logger.isDebugEnabled()) {
+					logger.debug("Could not resolve methods for bean with name '" + beanName + "'", ex);
+				}
+			}
+			if (CollectionUtils.isEmpty(annotatedMethods)) {
 				this.nonAnnotatedClasses.add(targetType);
 				if (logger.isTraceEnabled()) {
 					logger.trace("No @EventListener annotations found on bean class: " + targetType);