HHH-16911 Ensure we don't leak references to JPA callbacks on Session…

…Factory close

hibernate-core/src/main/java/org/hibernate/internal/SessionFactoryImpl.java

@@ -166,7 +166,7 @@ public class SessionFactoryImpl extends QueryParameterBindingTypeResolverImpl im
 	private final transient Map<String,Object> settings;
 
 	private final transient SessionFactoryServiceRegistry serviceRegistry;
-	private final transient EventEngine eventEngine;
+	private final transient EventEngine eventEngine;//Needs to be closed!
 	private final transient JdbcServices jdbcServices;
 	private final transient SqlStringGenerationContext sqlStringGenerationContext;
 
@@ -899,6 +899,9 @@ public void close() throws HibernateException {
 			if ( queryEngine != null ) {
 				queryEngine.close();
 			}
+			if ( eventEngine != null ) {
+				eventEngine.stop();
+			}
 		}
 		finally {
 			status = Status.CLOSED;