liubao68 commented on a change in pull request #2600:
URL: 
https://github.com/apache/servicecomb-java-chassis/pull/2600#discussion_r737116839



##########
File path: 
swagger/swagger-generator/generator-core/src/main/java/org/apache/servicecomb/swagger/SwaggerUtils.java
##########
@@ -210,20 +211,30 @@ public static void addDefinitions(Swagger swagger, Type 
paramType) {
     if (javaType.isTypeOrSubTypeOf(DynamicEnum.class)) {
       return;
     }
-
     Map<String, Model> models = 
ModelConverters.getInstance().readAll(javaType);
     for (Entry<String, Model> entry : models.entrySet()) {
       if (null != swagger.getDefinitions()) {
         Model tempModel = swagger.getDefinitions().get(entry.getKey());
         if (null != tempModel && !tempModel.equals(entry.getValue())) {
-          LOGGER.warn("duplicate param model: " + entry.getKey());
-          throw new IllegalArgumentException("duplicate param model: " + 
entry.getKey());
+          if (modelNotDuplicate(tempModel, entry.getValue())) {
+            swagger.addDefinition(entry.getKey(), tempModel);
+            continue;
+          } else {
+            LOGGER.warn("duplicate param model: " + entry.getKey());
+            throw new IllegalArgumentException("duplicate param model: " + 
entry.getKey());
+          }
         }
       }
       swagger.addDefinition(entry.getKey(), entry.getValue());
     }
   }
 
+  private static boolean modelNotDuplicate(Model tempModel, Model model){
+    String tempModelClass = (String) 
tempModel.getVendorExtensions().get(SwaggerConst.EXT_JAVA_CLASS);
+    String modelClass = (String) 
model.getVendorExtensions().get(SwaggerConst.EXT_JAVA_CLASS);
+    return tempModelClass.equals(modelClass);
+  }
+

Review comment:
       ```
       for (Entry<String, Model> entry : models.entrySet()) {
       if (modelNotDuplicate(swagger, entry) {
             swagger.addDefinition(entry.getKey(), entry.getValue());
       } else{
               LOGGER.warn("duplicate param model: " + entry.getKey());
               throw new IllegalArgumentException("duplicate param model: " + 
entry.getKey());
       }
      }
   
     /////////////////////
   
   
     private static boolean modelNotDuplicate(swagger, entry){
          if (null != swagger.getDefinitions()) {
              return false;
          }
          ....
   
           Model tempModel = swagger.getDefinitions().get(entry.getKey());
           if (null != tempModel && !tempModel.equals(entry.getValue())) 
   
   
       String tempModelClass = (String) 
tempModel.getVendorExtensions().get(SwaggerConst.EXT_JAVA_CLASS);
       String modelClass = (String) 
model.getVendorExtensions().get(SwaggerConst.EXT_JAVA_CLASS);
       return tempModelClass.equals(modelClass);
     }
   ```




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