diff --git a/core.py b/core.py
index ab8c7f98..9cccc54e 100644
--- a/core.py
+++ b/core.py
@@ -18,6 +18,7 @@
 from __future__ import absolute_import, division, print_function
 
 import os
+import traceback
 from optparse import Values
 from copy import copy
 
@@ -319,7 +320,8 @@ def rca_run(self, opts):
                 handler.handle()
                 handler.execute()
             except Exception as e:
-                self.stdio.error(e)
+                self.stdio.error("rca run Exception: {0}".format(e))
+                self.stdio.verbose(traceback.format_exc())
 
     def rca_list(self, opts):
         config = self.config_manager
diff --git a/handler/checker/check_handler.py b/handler/checker/check_handler.py
index a08b49df..b7fa207a 100644
--- a/handler/checker/check_handler.py
+++ b/handler/checker/check_handler.py
@@ -18,7 +18,7 @@
 
 import os
 import queue
-import time
+import traceback
 
 import yaml
 
@@ -168,11 +168,15 @@ def handle(self):
                             new_tasks[task_name] = task_value
                     self.tasks = new_tasks
             self.stdio.verbose("tasks is {0}".format(self.tasks.keys()))
+            return True
         except Exception as e:
-            self.stdio.error(e)
+            self.stdio.error("Get package tasks failed. Error info is {0}".format(e))
+            self.stdio.verbose(traceback.format_exc())
+            return False
 
     # get all tasks
     def get_all_tasks(self):
+        self.stdio.verbose("get all tasks")
         current_path = self.tasks_base_path
         tasks = {}
         for root, dirs, files in os.walk(current_path):
@@ -239,6 +243,7 @@ def execute(self):
             self.stdio.error("Report error :{0}".format(e))
         except Exception as e:
             self.stdio.error("Internal error :{0}".format(e))
+            self.stdio.verbose(traceback.format_exc())
 
 
 class checkOBConnectorPool:
diff --git a/handler/rca/scene/ddl_disk_full_scene.py b/handler/rca/scene/ddl_disk_full_scene.py
index e6bcb26a..db6bcb43 100644
--- a/handler/rca/scene/ddl_disk_full_scene.py
+++ b/handler/rca/scene/ddl_disk_full_scene.py
@@ -15,10 +15,9 @@
 @file: ddl_disk_full_scene.py
 @desc:
 """
-import re
 
 from handler.rca.rca_exception import RCAInitException, RCAExecuteException
-from handler.rca.rca_handler import RcaScene, RCA_ResultRecord
+from handler.rca.rca_handler import RcaScene
 from common.tool import StringUtils
 
 
@@ -108,12 +107,14 @@ def execute(self):
             ## if the action is not add_index
             # 获取各个节点上的源表大小，单位为B
             # self.stdio._call_stdio('start_loading', 'gstart query estimated_data_size, please wait some minutes...')
+            self.stdio.start_loading('start query estimated_data_size, please wait some minutes...')
             sql = "select svr_ip, svr_port, sum(original_size) as estimated_data_size from oceanbase.__all_virtual_tablet_sstable_macro_info where tablet_id in (select tablet_id from oceanbase.__all_virtual_tablet_to_table_history where table_id = {0}) and (svr_ip, svr_port) in (select svr_ip, svr_port from oceanbase.__all_virtual_ls_meta_table where role = 1) group by svr_ip, svr_port;".format(
                 self.table_id
             )
             self.verbose("execute_sql is {0}".format(sql))
             tablet_size_data = self.ob_connector.execute_sql_return_cursor_dictionary(sql).fetchall()
             # self.stdio._call_stdio('stop_loading', 'succeed')
+            self.stdio.stop_loading('succeed')
             for item in tablet_size_data:
                 tablet_size_data_ip = item["svr_ip"]
                 tablet_size_data_port = item["svr_port"]