CachedIntrospectionResults uses ConcurrentReferenceHashMap for its type descriptor cache

Issue: SPR-12185

Author: jhoeller

spring-beans/src/main/java/org/springframework/beans/CachedIntrospectionResults.java

@@ -303,7 +303,7 @@ private CachedIntrospectionResults(Class<?> beanClass) throws BeansException {
 				this.propertyDescriptorCache.put(pd.getName(), pd);
 			}
 
-			this.typeDescriptorCache = new ConcurrentHashMap<PropertyDescriptor, TypeDescriptor>();
+			this.typeDescriptorCache = new ConcurrentReferenceHashMap<PropertyDescriptor, TypeDescriptor>();
 		}
 		catch (IntrospectionException ex) {
 			throw new FatalBeanException("Failed to obtain BeanInfo for class [" + beanClass.getName() + "]", ex);