diff --git a/venus/modules/custom_config/controller.py b/venus/modules/custom_config/controller.py
index f8d3c51..b3ea342 100644
--- a/venus/modules/custom_config/controller.py
+++ b/venus/modules/custom_config/controller.py
@@ -40,7 +40,7 @@ class CustomConfigController(wsgi.Controller):
         id = body.get("id", None)
         value = body.get("value", None)
         if id is None or value is None:
-            return {"code": -1, "msg": "invalid param: id and value is need"}
+            return {"code": -1, "msg": "invalid param: id or value is missed"}
         self.config_api.set_config(id, value)
         return {"code": 0, "msg": "OK"}
 
diff --git a/venus/modules/search/es_template.py b/venus/modules/search/es_template.py
index 65b5311..83f440f 100644
--- a/venus/modules/search/es_template.py
+++ b/venus/modules/search/es_template.py
@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-"""Implementation of Template."""
+"""Implementation of Search Template."""
 
 
 def search_params(field, must_params):
diff --git a/venus/task/core/delete_es_index_task.py b/venus/task/core/delete_es_index_task.py
index 4bf38af..fd3ee98 100644
--- a/venus/task/core/delete_es_index_task.py
+++ b/venus/task/core/delete_es_index_task.py
@@ -45,7 +45,7 @@ class DeleteESIndexTask(object):
             LOG.error(_LE("delete es inidex:%s, catch exception:%s"),
                       name, str(e))
 
-    def delete_es_history_index(self):
+    def delete_es_outdated_index(self):
         len_d = self.config_api.get_config("log_save_days")
         if len_d is None:
             LOG.error(_LE("the config of log_save_days do not exist"))
@@ -75,7 +75,7 @@ class DeleteESIndexTask(object):
 
     def start_task(self):
         try:
-            self.delete_es_history_index()
+            self.delete_es_outdated_index()
             LOG.info(_LI("delete es index task done"))
         except Exception as e:
             LOG.error(_LE("delete es index task, catch exception:%s"), str(e))