diff --git a/src/main/java/com/alipay/hessian/NameBlackListFilter.java b/src/main/java/com/alipay/hessian/NameBlackListFilter.java
index c84c72f..a914c2d 100644
--- a/src/main/java/com/alipay/hessian/NameBlackListFilter.java
+++ b/src/main/java/com/alipay/hessian/NameBlackListFilter.java
@@ -169,5 +169,8 @@ protected boolean inBlackList(String className) {
 
     public static void setAddBlackPrefixList(List<String> addBlackPrefixList) {
         NameBlackListFilter.addBlackPrefixList = addBlackPrefixList;
+        if (resultOfInBlackList != null) {
+            resultOfInBlackList.clear();
+        }
     }
 }
diff --git a/src/main/java/com/caucho/hessian/io/SerializerFactory.java b/src/main/java/com/caucho/hessian/io/SerializerFactory.java
index 18a5522..6b5efef 100644
--- a/src/main/java/com/caucho/hessian/io/SerializerFactory.java
+++ b/src/main/java/com/caucho/hessian/io/SerializerFactory.java
@@ -456,6 +456,14 @@ public Deserializer getDeserializer(String type)
         if (type == null || type.equals(""))
             return null;
 
+        if (classNameResolver != null) {
+            try {
+                type = classNameResolver.resolve(type);
+            } catch (Exception e) {
+                throw new HessianProtocolException(e);
+            }
+        }
+
         Deserializer deserializer;
 
         deserializer = (Deserializer) _cachedTypeDeserializerMap.get(type);
@@ -467,14 +475,6 @@ public Deserializer getDeserializer(String type)
         if (deserializer != null)
             return deserializer;
 
-        if (classNameResolver != null) {
-            try {
-                type = classNameResolver.resolve(type);
-            } catch (Exception e) {
-                throw new HessianProtocolException(e);
-            }
-        }
-
         if (type.startsWith("[")) {
             Deserializer subDeserializer = getDeserializer(type.substring(1));
             deserializer = new ArrayDeserializer(subDeserializer);