SimpleApplicationEventMulticaster leniently handles ClassCastException

Issue: SPR-14109
(cherry picked from commit 13f889e)

Author: jhoeller

spring-context/src/main/java/org/springframework/context/event/SimpleApplicationEventMulticaster.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.
@@ -18,6 +18,8 @@
 
 import java.util.concurrent.Executor;
 
+import org.apache.commons.logging.LogFactory;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationListener;
@@ -160,7 +162,13 @@ protected void invokeListener(ApplicationListener listener, ApplicationEvent eve
 			}
 		}
 		else {
-			listener.onApplicationEvent(event);
+			try {
+				listener.onApplicationEvent(event);
+			}
+			catch (ClassCastException ex) {
+				// Possibly a lambda-defined listener which we could not resolve the generic event type for
+				LogFactory.getLog(getClass()).debug("Non-matching event type for listener: " + listener, ex);
+			}
 		}
 	}