diff --git a/spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/AbstractAutoProxyCreator.java b/spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/AbstractAutoProxyCreator.java
index bf2c701f9be..208c161fa65 100644
--- a/spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/AbstractAutoProxyCreator.java
+++ b/spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/AbstractAutoProxyCreator.java
@@ -226,7 +226,9 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 	@Override
 	public Object getEarlyBeanReference(Object bean, String beanName) throws BeansException {
 		Object cacheKey = getCacheKey(bean.getClass(), beanName);
-		this.earlyProxyReferences.add(cacheKey);
+		if (!this.earlyProxyReferences.contains(cacheKey)) {
+			this.earlyProxyReferences.add(cacheKey);
+		}
 		return wrapIfNecessary(bean, beanName, cacheKey);
 	}
 
diff --git a/spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractBeanFactory.java b/spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractBeanFactory.java
index 526ebd73c55..d0a8f18ac8b 100644
--- a/spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractBeanFactory.java
+++ b/spring-beans/src/main/java/org/springframework/beans/factory/support/AbstractBeanFactory.java
@@ -959,7 +959,7 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 
 	@Override
 	public boolean isActuallyInCreation(String beanName) {
-		return isSingletonCurrentlyInCreation(beanName) || isPrototypeCurrentlyInCreation(beanName);
+		return (isSingletonCurrentlyInCreation(beanName) || isPrototypeCurrentlyInCreation(beanName));
 	}
 
 	/**
@@ -1435,7 +1435,9 @@ public abstract class AbstractBeanFactory extends FactoryBeanRegistrySupport imp
 	 * @param beanName the name of the bean
 	 */
 	protected void markBeanAsCreated(String beanName) {
-		this.alreadyCreated.add(beanName);
+		if (!this.alreadyCreated.contains(beanName)) {
+			this.alreadyCreated.add(beanName);
+		}
 	}
 
 	/**