diff --git a/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/BasicErrorCode.java b/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/BasicErrorCode.java
index b91f2ed6f..61903dca3 100644
--- a/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/BasicErrorCode.java
+++ b/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/BasicErrorCode.java
@@ -3,11 +3,10 @@
 /**
  * Application Exceptions can be divided into Biz Exception and Sys Exception.
  *
- * BizException (including ParamException) is not retry-able, while Sys Exception could be instantaneous and retry-able.
+ * Business Exception is not retry-able, while System Exception could be instantaneous and retry-able.
  *
- * So i suggest to define 3 types of ErrorCode, the format is TYPE_SCENARIO_REASON
+ * So i suggest to define 2 types of ErrorCode, the format is TYPE_SCENARIO_REASON
  *
- * TYPE: P_  Stands for Parameter
  * TYPE: B_  Stands for Business
  * TYPE: S_  Stands for System
  *
@@ -19,7 +18,9 @@ public enum BasicErrorCode implements ErrorCodeI{
      * Parameter Exception
      *
      * You can extend it by implementing ErrorCodeI in your Application
-     * For example: P_CUSTOMER_NameIsNull("P_CUSTOMER_NameIsNull","客户姓名不能为空")
+     * For example:
+     *
+     * P_CUSTOMER_NameIsNull("P_CUSTOMER_NameIsNull","客户姓名不能为空")
      */
     P_COMMON_ERROR("P_COMMON_ERROR" , "通用的参数校验错误"),
 
@@ -27,7 +28,12 @@ public enum BasicErrorCode implements ErrorCodeI{
      * Business Exception
      *
      * You can extend it by implementing ErrorCodeI in your Application
-     * For example: B_CUSTOMER_NameAlreadyExist("B_CUSTOMER_NameAlreadyExist","客户姓名已经存在")
+     * For example:
+     *
+     * <pre class="code">
+     * B_CUSTOMER_NameIsNull("B_CUSTOMER_NameIsNull","客户姓名不能为空")
+     * B_CUSTOMER_NameAlreadyExist("B_CUSTOMER_NameAlreadyExist","客户姓名已经存在")
+     * </pre>
      */
     B_COMMON_ERROR("B_COMMON_ERROR" , "通用的业务逻辑错误"),
 
diff --git a/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/DefaultExceptionHandler.java b/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/DefaultExceptionHandler.java
index 77be99831..e8b33f2e2 100644
--- a/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/DefaultExceptionHandler.java
+++ b/cola-framework/cola-core/src/main/java/com/alibaba/cola/exception/DefaultExceptionHandler.java
@@ -25,7 +25,7 @@ public void handleException(Command cmd, Response response, Exception exception)
 
     private void printLog(Command cmd, Response response, Exception exception) {
         if(exception instanceof BizException || exception instanceof ParamException){
-            //biz exception is expected, only warn it
+            //biz exception is expected, only warn it, 2 git remote test
             logger.warn(buildErrorMsg(cmd, response));
         }
         else{