diff --git a/common/command.py b/common/command.py
index 84bd00a6..f62134f8 100644
--- a/common/command.py
+++ b/common/command.py
@@ -243,7 +243,7 @@ def get_observer_version(context):
         stdio.verbose("get observer version, by sql")
         obcluster = context.cluster_config
         # by sql
-        observer_version = get_observer_version_by_sql(context, obcluster, stdio)
+        observer_version = get_observer_version_by_sql(context, obcluster)
     except Exception as e:
         try:
             stdio.verbose("get observer version, by sql fail. by ssh")
@@ -325,15 +325,15 @@ def get_obproxy_version(context):
 # Only applicable to the community version
 
 
-def get_observer_version_by_sql(context, ob_cluster, stdio=None):
-    stdio.verbose("start get_observer_version_by_sql . input: {0}:{1}".format(ob_cluster.get("db_host"), ob_cluster.get("db_port")))
+def get_observer_version_by_sql(context, ob_cluster):
+    context.stdio.verbose("start get_observer_version_by_sql . input: {0}:{1}".format(ob_cluster.get("db_host"), ob_cluster.get("db_port")))
     try:
         ob_connector = OBConnector(context=context, ip=ob_cluster.get("db_host"), port=ob_cluster.get("db_port"), username=ob_cluster.get("tenant_sys").get("user"), password=ob_cluster.get("tenant_sys").get("password"), timeout=100)
         ob_version_info = ob_connector.execute_sql("select version();")
     except Exception as e:
         raise Exception("get_observer_version_by_sql Exception. Maybe cluster'info is error: " + e.__str__())
     ob_version = ob_version_info[0]
-    stdio.verbose("get_observer_version_by_sql ob_version_info is {0}".format(ob_version))
+    context.stdio.verbose("get_observer_version_by_sql ob_version_info is {0}".format(ob_version))
     version = re.findall(r'OceanBase(_)?(.CE)?-v(.+)', ob_version[0])
     if len(version) > 0:
         return version[0][2]
diff --git a/core.py b/core.py
index 20a75c4a..9061a919 100644
--- a/core.py
+++ b/core.py
@@ -172,7 +172,7 @@ def update_obcluster_nodes(self, config):
         if config_data['obcluster'] and config_data['obcluster']['servers'] and config_data['obcluster']['servers']['nodes']:
             return
         if Util.check_none_values(ob_cluster, self.stdio):
-            ob_version = get_observer_version_by_sql(self.context, ob_cluster, self.stdio)
+            ob_version = get_observer_version_by_sql(self.context, ob_cluster)
             obConnetcor = OBConnector(context=self.context, ip=ob_cluster["db_host"], port=ob_cluster["db_port"], username=ob_cluster["tenant_sys"]["user"], password=ob_cluster["tenant_sys"]["password"], timeout=100)
             sql = "select SVR_IP, SVR_PORT, ZONE, BUILD_VERSION from oceanbase.DBA_OB_SERVERS"
             if ob_version.startswith("3") or ob_version.startswith("2") or ob_version.startswith("1"):
diff --git a/handler/analyzer/analyze_memory.py b/handler/analyzer/analyze_memory.py
index 802d4ed5..3610e9f9 100644
--- a/handler/analyzer/analyze_memory.py
+++ b/handler/analyzer/analyze_memory.py
@@ -135,7 +135,7 @@ def init_option(self):
     def get_version(self):
         observer_version = ""
         try:
-            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster, self.stdio)
+            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster)
         except Exception as e:
             self.stdio.warn("failed to get observer version:{0}".format(e))
         self.stdio.verbose("get observer version: {0}".format(observer_version))
diff --git a/handler/analyzer/analyze_parameter.py b/handler/analyzer/analyze_parameter.py
index 31bab424..7f8df5d3 100644
--- a/handler/analyzer/analyze_parameter.py
+++ b/handler/analyzer/analyze_parameter.py
@@ -59,7 +59,7 @@ def __init__(self, context, analyze_type='default'):
     def get_version(self):
         observer_version = ""
         try:
-            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster, self.stdio)
+            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster)
         except Exception as e:
             self.stdio.warn("failed to get observer version:{0}".format(e))
         self.stdio.verbose("get observer version: {0}".format(observer_version))
diff --git a/handler/analyzer/analyze_queue.py b/handler/analyzer/analyze_queue.py
index 11d4c173..fc26a46c 100644
--- a/handler/analyzer/analyze_queue.py
+++ b/handler/analyzer/analyze_queue.py
@@ -159,7 +159,7 @@ def init_option(self):
     def get_version(self):
         observer_version = ""
         try:
-            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster, self.stdio)
+            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster)
         except Exception as e:
             self.stdio.warn("AnalyzeQueueHandler failed to get observer version:{0}".format(e))
         self.stdio.verbose("AnalyzeQueueHandler get observer version: {0}".format(observer_version))
diff --git a/handler/gather/gather_parameters.py b/handler/gather/gather_parameters.py
index b9c06825..439536f2 100644
--- a/handler/gather/gather_parameters.py
+++ b/handler/gather/gather_parameters.py
@@ -77,7 +77,7 @@ def init_option(self):
     def get_version(self):
         observer_version = ""
         try:
-            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster, self.stdio)
+            observer_version = get_observer_version_by_sql(self.context, self.ob_cluster)
         except Exception as e:
             self.stdio.warn("failed to get observer version:{0}".format(e))
         self.stdio.verbose("get observer version: {0}".format(observer_version))