diff --git a/source/dnode/vnode/src/meta/metaSnapshot.c b/source/dnode/vnode/src/meta/metaSnapshot.c
index bb20a1a7ff..7f69c7a638 100644
--- a/source/dnode/vnode/src/meta/metaSnapshot.c
+++ b/source/dnode/vnode/src/meta/metaSnapshot.c
@@ -194,4 +194,4 @@ int32_t metaSnapWrite(SMetaSnapWriter* pWriter, uint8_t* pData, uint32_t nData)
 _err:
   metaError("vgId:%d vnode snapshot meta write failed since %s", TD_VID(pMeta->pVnode), tstrerror(code));
   return code;
-}
\ No newline at end of file
+}
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas_querys.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas_querys.py
new file mode 100644
index 0000000000..02d944b08f
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas_querys.py
@@ -0,0 +1,202 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import time
+import socket
+import subprocess ,threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.db_name ='testdb'
+        self.replica = 1 
+        self.vgroups = 1
+        self.tb_nums = 10 
+        self.row_nums = 1000
+        self.query_times = 500
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_db_check_vgroups(self):
+
+        tdSql.execute("drop database if exists test")
+        tdSql.execute("create database if not exists test replica 1 duration 300")
+        tdSql.execute("use test")
+        tdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        tdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(5):
+            tdSql.execute("create table sub_tb_{} using stb1 tags({})".format(i,i))
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.query("show tables")
+        tdSql.checkRows(6)
+
+        tdSql.query("show test.vgroups;")
+        vgroups_infos = {}  # key is id: value is info list
+        for vgroup_info in tdSql.queryResult:
+            vgroup_id = vgroup_info[0]
+            tmp_list = []
+            for role in vgroup_info[3:-4]:
+                if role in ['leader','follower']:
+                    tmp_list.append(role)
+            vgroups_infos[vgroup_id]=tmp_list
+
+        for k , v in vgroups_infos.items():
+            if len(v) ==1 and v[0]=="leader":
+                tdLog.notice(" === create database replica only 1 role leader  check success of vgroup_id {} ======".format(k))
+            else:
+                tdLog.exit(" === create database replica only 1 role leader  check fail of vgroup_id {} ======".format(k))
+
+    def create_db_replica_3_insertdatas(self, dbname, replica_num ,vgroup_nums ,tb_nums , row_nums ):
+        newTdSql=tdCom.newTdSql()
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        newTdSql.execute(drop_db_sql)
+        newTdSql.execute(create_db_sql)
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        newTdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(tb_nums):
+            sub_tbname = "sub_tb_{}".format(i)
+            newTdSql.execute("create table {} using stb1 tags({})".format(sub_tbname,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                ts = self.ts + 1000*row_num
+                newTdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== create database {} and insert rows execute end =====".format(dbname))
+
+    
+
+    def check_insert_status(self, newTdSql ,dbname, tb_nums , row_nums):
+        # newTdSql=tdCom.newTdSql()
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.query("select count(*) from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkData(0 , 0 , tb_nums*row_nums)
+        newTdSql.query("select distinct tbname from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkRows(tb_nums)
+
+    def loop_query_constantly(self, times ,  db_name, tb_nums ,row_nums):
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === query is going ,this is {}_th query === ".format(loop_time))
+            self.check_insert_status( newTdSql , db_name, tb_nums , row_nums)
+
+    def run(self): 
+        self.check_setup_cluster_status()
+        self.create_db_check_vgroups()
+        
+        # start writing constantly 
+        writing = threading.Thread(target = self.create_db_replica_3_insertdatas, args=(self.db_name , self.replica , self.vgroups , self.tb_nums , self.row_nums))
+        writing.start()
+        tdSql.query(" show {}.stables ".format(self.db_name))
+        while not tdSql.queryResult:
+            print(tdSql.queryResult)
+            time.sleep(0.1)
+            tdSql.query(" show {}.stables ".format(self.db_name))
+
+        reading = threading.Thread(target = self.loop_query_constantly, args=(self.query_times,self.db_name , self.tb_nums , self.row_nums))
+        reading.start()
+        
+        writing.join()
+        reading.join()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_force_stop_all_dnodes.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_force_stop_all_dnodes.py
new file mode 100644
index 0000000000..3d01015af6
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_force_stop_all_dnodes.py
@@ -0,0 +1,428 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import datetime
+import inspect
+import time
+import socket
+import subprocess
+import threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.ts_step =1000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 1
+        self.tb_nums = 10 
+        self.row_nums = 100
+        self.stop_dnode_id = None
+        self.loop_restart_times = 5
+        self.current_thread = None
+        self.max_restart_time = 10
+        self.try_check_times = 10
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_database(self, dbname, replica_num ,vgroup_nums ):
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        tdSql.execute(drop_db_sql)
+        tdSql.execute(create_db_sql)
+        tdSql.execute("use {}".format(dbname))
+       
+    def create_stable_insert_datas(self,dbname ,stablename , tb_nums , row_nums):
+        tdSql.execute("use {}".format(dbname))
+        tdSql.execute(
+        '''create table {}
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''.format(stablename)
+        )
+    
+        for i in range(tb_nums):
+            sub_tbname = "sub_{}_{}".format(stablename,i)
+            tdSql.execute("create table {} using {} tags({})".format(sub_tbname, stablename ,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                ts = self.ts + self.ts_step*row_num
+                tdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== stable {} insert rows execute end =====".format(stablename))
+    
+    def append_rows_of_exists_tables(self,dbname ,stablename , tbname , append_nums ):
+        
+        tdSql.execute("use {}".format(dbname))
+     
+        for row_num in range(append_nums):
+            tdSql.execute(f"insert into {tbname} values (now, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+            # print(f"insert into {tbname} values (now, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+        tdLog.notice(" ==== append new rows of table {} belongs to  stable {} execute end =====".format(tbname,stablename))
+        os.system("taos -s 'select count(*) from {}.{}';".format(dbname,stablename))
+
+    def check_insert_rows(self, dbname, stablename , tb_nums , row_nums, append_rows):
+    
+        tdSql.execute("use {}".format(dbname))
+        
+        tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+
+        while not tdSql.queryResult:
+            time.sleep(0.1)
+            tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+
+        status_OK = self.mycheckData("select count(*) from {}.{}".format(dbname,stablename) ,0 , 0 , tb_nums*row_nums+append_rows)
+        
+        count = 0 
+        while not status_OK :
+            if count > self.try_check_times:
+                os.system("taos -s ' show {}.vgroups; '".format(dbname))
+                tdLog.exit(" ==== check insert rows failed  after {}  try check {} times  of database {}".format(count , self.try_check_times ,dbname))
+                break
+            time.sleep(0.1)
+            tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+            while not tdSql.queryResult:
+                time.sleep(0.1)
+                tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+            status_OK = self.mycheckData("select count(*) from {}.{}".format(dbname,stablename) ,0 , 0 , tb_nums*row_nums+append_rows)
+            tdLog.debug(" ==== check insert rows first failed , this is {}_th retry check rows of database {}".format(count , dbname))
+            count += 1
+        
+
+        tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+        while not tdSql.queryResult:
+            time.sleep(0.1)
+            tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+        status_OK = self.mycheckRows("select distinct tbname from {}.{}".format(dbname,stablename) ,tb_nums)
+        count = 0 
+        while not status_OK :
+            if count > self.try_check_times:
+                os.system("taos -s ' show {}.vgroups;'".format(dbname))
+                tdLog.exit(" ==== check insert rows failed  after {}  try check {} times  of database {}".format(count , self.try_check_times ,dbname))
+                break
+            time.sleep(0.1)
+            tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+            while not tdSql.queryResult:
+                time.sleep(0.1)
+                tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+            status_OK = self.mycheckRows("select distinct tbname from {}.{}".format(dbname,stablename) ,tb_nums)
+            tdLog.debug(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
+            count += 1
+
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
+        tdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
+        for vgroup_info in vgroup_infos:
+            leader_infos = vgroup_info[3:-4] 
+            # print(vgroup_info)
+            for ind ,role in enumerate(leader_infos):
+                if role == dnode_role:
+                    # print(ind,leader_infos)
+                    self.stop_dnode_id = leader_infos[ind-1]
+                    break
+
+        return self.stop_dnode_id
+
+    def wait_stop_dnode_OK(self ,newTdSql ):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="offline":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has stopped , id is {} ====".format(self.stop_dnode_id))
+
+    def wait_start_dnode_OK(self , newTdSql):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="ready":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has restart , id is {} ====".format(self.stop_dnode_id))
+
+    def _parse_datetime(self,timestr):
+        try:
+            return datetime.datetime.strptime(timestr, '%Y-%m-%d %H:%M:%S.%f')
+        except ValueError:
+            pass
+        try:
+            return datetime.datetime.strptime(timestr, '%Y-%m-%d %H:%M:%S')
+        except ValueError:
+            pass
+
+    def mycheckRowCol(self, sql, row, col):
+        caller = inspect.getframeinfo(inspect.stack()[2][0])
+        if row < 0:
+            args = (caller.filename, caller.lineno, sql, row)
+            tdLog.exit("%s(%d) failed: sql:%s, row:%d is smaller than zero" % args)
+        if col < 0:
+            args = (caller.filename, caller.lineno, sql, row)
+            tdLog.exit("%s(%d) failed: sql:%s, col:%d is smaller than zero" % args)
+        if row > tdSql.queryRows:
+            args = (caller.filename, caller.lineno, sql, row, tdSql.queryRows)
+            tdLog.exit("%s(%d) failed: sql:%s, row:%d is larger than queryRows:%d" % args)
+        if col > tdSql.queryCols:
+            args = (caller.filename, caller.lineno, sql, col, tdSql.queryCols)
+            tdLog.exit("%s(%d) failed: sql:%s, col:%d is larger than queryCols:%d" % args)
+
+    def mycheckData(self, sql ,row, col, data):
+        check_status = True
+        self.mycheckRowCol(sql ,row, col)
+        if tdSql.queryResult[row][col] != data:
+            if tdSql.cursor.istype(col, "TIMESTAMP"):
+                # suppose user want to check nanosecond timestamp if a longer data passed
+                if (len(data) >= 28):
+                    if pd.to_datetime(tdSql.queryResult[row][col]) == pd.to_datetime(data):
+                        tdLog.info("sql:%s, row:%d col:%d data:%d == expect:%s" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                else:
+                    if tdSql.queryResult[row][col] == self._parse_datetime(data):
+                        tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                return
+
+            if str(tdSql.queryResult[row][col]) == str(data):
+                tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                return
+            elif isinstance(data, float) and abs(tdSql.queryResult[row][col] - data) <= 0.000001:
+                tdLog.info("sql:%s, row:%d col:%d data:%f == expect:%f" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                return
+            else:
+                caller = inspect.getframeinfo(inspect.stack()[1][0])
+                args = (caller.filename, caller.lineno, sql, row, col, tdSql.queryResult[row][col], data)
+                tdLog.info("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
+
+                check_status = False
+
+        if data is None:
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+        elif isinstance(data, str):
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+        # elif isinstance(data, datetime.date):
+        #     tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+        #                (sql, row, col, tdSql.queryResult[row][col], data))
+        elif isinstance(data, float):
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+        else:
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%d" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+
+        return check_status
+
+    def mycheckRows(self, sql, expectRows):
+        check_status = True
+        if len(tdSql.queryResult) == expectRows:
+            tdLog.info("sql:%s, queryRows:%d == expect:%d" % (sql, len(tdSql.queryResult), expectRows))
+            return True
+        else:
+            caller = inspect.getframeinfo(inspect.stack()[1][0])
+            args = (caller.filename, caller.lineno, sql, len(tdSql.queryResult), expectRows)
+            tdLog.info("%s(%d) failed: sql:%s, queryRows:%d != expect:%d" % args)
+            check_status = False
+        return check_status
+
+    def force_stop_dnode(self, dnode_id ):
+        
+        port = None
+        for k ,v  in self.dnode_list.items():
+            if v[0] == dnode_id:
+                port = k.split(":")[-1]
+            else:
+                continue
+
+        if port:
+            tdLog.notice(" ==== dnode {} will be force stop by kill -9 ====".format(dnode_id))
+            psCmd = '''netstat -anp|grep -w LISTEN|grep -w %s |grep -o "LISTEN.*"|awk '{print $2}'|cut -d/ -f1|head -n1''' %(port)
+            processID = subprocess.check_output(
+                psCmd, shell=True).decode("utf-8")
+            ps_kill_taosd = ''' kill -9 {} '''.format(processID)
+            # print(ps_kill_taosd)
+            os.system(ps_kill_taosd)
+        else :
+            tdLog.exit(" ==== port of dnode {} not found ====".format(dnode_id))
+
+    def stop_All(self):
+
+        tdDnodes = cluster.dnodes
+        # newTdSql=tdCom.newTdSql()
+        # ==== stop all dnode =====
+        for k ,v in self.dnode_list.items():
+            dnode_id = v[0]
+            # tdDnodes[dnode_id-1].stoptaosd()
+            self.force_stop_dnode(dnode_id)
+            # self.wait_stop_dnode_OK(newTdSql)
+
+    def start_All(self):
+        tdDnodes = cluster.dnodes
+        # newTdSql=tdCom.newTdSql()
+        for k ,v in self.dnode_list.items():
+            dnode_id = v[0]
+            start = time.time()
+            tdDnodes[dnode_id-1].starttaosd()
+            # self.wait_start_dnode_OK(newTdSql)
+            end = time.time()
+            time_cost = int(end -start)
+            if time_cost > self.max_restart_time:
+                tdLog.exit(" ==== restart dnode {} cost too much time , please check ====".format(self.stop_dnode_id))
+
+
+        
+    def stop_All_dnodes_check_datas(self):
+
+        # stop follower and insert datas , update tables and create new stables
+        self.create_database(dbname = self.db_name ,replica_num= self.replica  , vgroup_nums= 1)
+        self.create_stable_insert_datas(dbname = self.db_name , stablename = "stb1" , tb_nums= self.tb_nums ,row_nums= self.row_nums )
+        self.check_insert_rows(self.db_name ,'stb1' ,tb_nums = self.tb_nums , row_nums= self.row_nums ,append_rows=0)
+        os.system(" taos -s ' select count(*) from {}.{}  ;'".format(self.db_name ,'stb1' ))
+
+        for i in range(self.loop_restart_times):
+            # begin to stop All taosd 
+            self.stop_All()
+            # begin to start All taosd
+            self.start_All()
+
+            tdLog.debug(" ==== cluster has restart , this is {}_th restart cluster  ==== ".format(i))
+
+            self.check_insert_rows(self.db_name ,'stb1' ,tb_nums = self.tb_nums , row_nums= self.row_nums ,append_rows=0)
+            os.system(" taos -s ' select count(*) from {}.{}  ;'".format(self.db_name ,'stb1' ))
+
+        self.append_rows_of_exists_tables(self.db_name ,"stb1" , "sub_stb1_0" , 100 )
+        os.system(" taos -s ' select count(*) from {}.{}  ;'".format(self.db_name ,'stb1' ))
+            
+
+    def run(self): 
+
+        # basic insert and check of cluster
+        self.check_setup_cluster_status()
+        self.stop_All_dnodes_check_datas()
+        
+        
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys.py
new file mode 100644
index 0000000000..3649617c21
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys.py
@@ -0,0 +1,204 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import time
+import socket
+import subprocess ,threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 1
+        self.tb_nums = 10 
+        self.row_nums = 1000
+        self.query_times = 1000
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_db_check_vgroups(self):
+
+        tdSql.execute("drop database if exists test")
+        tdSql.execute("create database if not exists test replica 1 duration 300")
+        tdSql.execute("use test")
+        tdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        tdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(5):
+            tdSql.execute("create table sub_tb_{} using stb1 tags({})".format(i,i))
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.query("show tables")
+        tdSql.checkRows(6)
+
+        tdSql.query("show test.vgroups;")
+        vgroups_infos = {}  # key is id: value is info list
+        for vgroup_info in tdSql.queryResult:
+            vgroup_id = vgroup_info[0]
+            tmp_list = []
+            for role in vgroup_info[3:-4]:
+                if role in ['leader','follower']:
+                    tmp_list.append(role)
+            vgroups_infos[vgroup_id]=tmp_list
+
+        for k , v in vgroups_infos.items():
+            if len(v) ==1 and v[0]=="leader":
+                tdLog.notice(" === create database replica only 1 role leader  check success of vgroup_id {} ======".format(k))
+            else:
+                tdLog.exit(" === create database replica only 1 role leader  check fail of vgroup_id {} ======".format(k))
+
+    def create_db_replica_3_insertdatas(self, dbname, replica_num ,vgroup_nums ,tb_nums , row_nums ):
+        newTdSql=tdCom.newTdSql()
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        newTdSql.execute(drop_db_sql)
+        newTdSql.execute(create_db_sql)
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        newTdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(tb_nums):
+            sub_tbname = "sub_tb_{}".format(i)
+            newTdSql.execute("create table {} using stb1 tags({})".format(sub_tbname,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                if row_num %100 ==0:
+                    tdLog.info(" === writing is going now === ")
+                ts = self.ts + 1000*row_num
+                newTdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== create database {} and insert rows execute end =====".format(dbname))
+
+    
+
+    def check_insert_status(self, newTdSql ,dbname, tb_nums , row_nums):
+        
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.query("select count(*) from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkData(0 , 0 , tb_nums*row_nums)
+        newTdSql.query("select distinct tbname from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkRows(tb_nums)
+
+    def loop_query_constantly(self, times ,  db_name, tb_nums ,row_nums):
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === query is going ,this is {}_th query === ".format(loop_time))
+            self.check_insert_status( newTdSql ,db_name, tb_nums , row_nums)
+
+    def run(self): 
+        self.check_setup_cluster_status()
+        self.create_db_check_vgroups()
+        
+        # start writing constantly 
+        writing = threading.Thread(target = self.create_db_replica_3_insertdatas, args=(self.db_name , self.replica , self.vgroups , self.tb_nums , self.row_nums))
+        writing.start()
+        tdSql.query(" show {}.stables ".format(self.db_name))
+        while not tdSql.queryResult:
+            print(tdSql.queryResult)
+            time.sleep(0.1)
+            tdSql.query(" show {}.stables ".format(self.db_name))
+
+        reading = threading.Thread(target = self.loop_query_constantly, args=(self.query_times,self.db_name , self.tb_nums , self.row_nums))
+        reading.start()
+        
+        writing.join()
+        reading.join()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_all_vnode.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_all_vnode.py
new file mode 100644
index 0000000000..db05eca9ce
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_all_vnode.py
@@ -0,0 +1,355 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import time
+import socket
+import subprocess ,threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 1
+        self.tb_nums = 10 
+        self.row_nums = 500
+        self.max_restart_time = 20
+        self.restart_server_times = 10
+        self.dnode_index = 0 
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_db_check_vgroups(self):
+
+        tdSql.execute("drop database if exists test")
+        tdSql.execute("create database if not exists test replica 1 duration 300")
+        tdSql.execute("use test")
+        tdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        tdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(5):
+            tdSql.execute("create table sub_tb_{} using stb1 tags({})".format(i,i))
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.query("show tables")
+        tdSql.checkRows(6)
+
+        tdSql.query("show test.vgroups;")
+        vgroups_infos = {}  # key is id: value is info list
+
+        for vgroup_info in tdSql.queryResult:
+            vgroup_id = vgroup_info[0]
+            tmp_list = []
+            for role in vgroup_info[3:-4]:
+                if role in ['leader','follower']:
+                    tmp_list.append(role)
+            vgroups_infos[vgroup_id]=tmp_list
+
+        for k , v in vgroups_infos.items():
+            if len(v) ==1 and v[0]=="leader":
+                tdLog.notice(" === create database replica only 1 role leader  check success of vgroup_id {} ======".format(k))
+            else:
+                tdLog.exit(" === create database replica only 1 role leader  check fail of vgroup_id {} ======".format(k))
+
+    def create_db_replica_3_insertdatas(self, dbname, replica_num ,vgroup_nums ,tb_nums , row_nums ):
+
+        newTdSql=tdCom.newTdSql()
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        newTdSql.execute(drop_db_sql)
+        newTdSql.execute(create_db_sql)
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        newTdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(tb_nums):
+            sub_tbname = "sub_tb_{}".format(i)
+            newTdSql.execute("create table {} using stb1 tags({})".format(sub_tbname,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                if row_num % (int(row_nums*0.1)) == 0 :
+                    tdLog.notice( " === database {} writing records {} rows".format(dbname , row_num ) )
+                ts = self.ts + 1000*row_num
+
+                newTdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== create database {} and insert rows execute end =====".format(dbname))
+
+    
+    def _get_stop_dnode_id(self):
+
+        
+        dnode_lists = list(set(self.dnode_list.keys()) -set(self.mnode_list.keys()))
+        # print(dnode_lists)
+        self.stop_dnode_id = self.dnode_list[dnode_lists[self.dnode_index % 3]][0]
+
+        self.dnode_index += 1 
+
+        return self.stop_dnode_id
+
+    def wait_stop_dnode_OK(self , newTdSql):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+
+        while status !="offline":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has stopped , id is {} ====".format(self.stop_dnode_id))
+
+    def wait_start_dnode_OK(self , newTdSql ):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="ready":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has restart , id is {} ====".format(self.stop_dnode_id))
+
+    def get_leader_infos(self , newTdSql , dbname):
+        
+        # newTdSql=tdCom.newTdSql()
+        newTdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = newTdSql.queryResult
+
+        leader_infos = set()
+        for vgroup_info in vgroup_infos:
+            leader_infos.add(vgroup_info[3:-4])
+
+        return leader_infos
+
+    def check_revote_leader_success(self, dbname, before_leader_infos , after_leader_infos):
+
+        check_status = False
+        vote_act = set(set(after_leader_infos)-set(before_leader_infos))
+        if not vote_act:
+            print("=======before_revote_leader_infos ======\n" , before_leader_infos)
+            print("=======after_revote_leader_infos ======\n" , after_leader_infos)
+            tdLog.exit(" ===maybe revote not occured , there is no dnode offline ====")
+        else:
+            for vgroup_info in vote_act:
+                for ind , role in enumerate(vgroup_info):  
+                    if role==self.stop_dnode_id:
+
+                        if vgroup_info[ind+1] =="offline" and "leader" in vgroup_info:
+                            tdLog.notice(" === revote leader ok , leader is {} now   ====".format(vgroup_info[list(vgroup_info).index("leader")-1]))
+                            check_status = True
+                        elif vgroup_info[ind+1] !="offline":
+                            tdLog.notice(" === dnode {} should be offline ".format(self.stop_dnode_id))
+                        else:
+                            continue
+                        break
+        return check_status
+
+
+    def check_insert_status(self, newTdSql , dbname, tb_nums , row_nums):
+
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.query("select count(*) from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkData(0 , 0 , tb_nums*row_nums)
+        newTdSql.query("select distinct tbname from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkRows(tb_nums)
+
+    def loop_query_constantly(self, times ,  db_name, tb_nums ,row_nums):
+
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === query is going ,this is {}_th query === ".format(loop_time))
+            
+            self.check_insert_status( newTdSql ,db_name, tb_nums , row_nums)
+
+    
+    def loop_restart_follower_constantly(self, times , db_name):
+
+        tdDnodes = cluster.dnodes
+        newTdSql=tdCom.newTdSql()
+
+        for loop_time in range(times):
+
+            self.stop_dnode_id = self._get_stop_dnode_id()
+            
+            # print(self.stop_dnode_id)
+            # begin stop dnode 
+
+            # before_leader_infos = self.get_leader_infos( newTdSql ,db_name)
+            tdDnodes[self.stop_dnode_id-1].stoptaosd()
+            self.wait_stop_dnode_OK(newTdSql)
+
+            # start = time.time()
+            # # get leader info after stop 
+            # after_leader_infos = self.get_leader_infos(newTdSql , db_name)
+             
+            # revote_status = self.check_revote_leader_success(db_name ,before_leader_infos , after_leader_infos)
+
+            # # append rows of stablename when dnode stop make sure revote leaders
+            
+            # while not revote_status:
+            #     after_leader_infos = self.get_leader_infos(newTdSql , db_name)
+            #     revote_status = self.check_revote_leader_success(db_name ,before_leader_infos , after_leader_infos)
+
+            # end = time.time()
+            # time_cost = end - start 
+            # tdLog.notice(" ==== revote leader of database {} cost time {}  ====".format(db_name , time_cost))
+
+            tdLog.notice(" === this is {}_th restart taosd === ".format(loop_time))
+
+            # begin start dnode 
+            start = time.time()
+            tdDnodes[self.stop_dnode_id-1].starttaosd()
+            self.wait_start_dnode_OK(newTdSql)
+            time.sleep(5)
+            end = time.time()
+            time_cost = int(end -start)
+            if time_cost > self.max_restart_time:
+                tdLog.exit(" ==== restart dnode {} cost too much time , please check ====".format(self.stop_dnode_id))
+            
+
+
+    def run(self): 
+
+        self.check_setup_cluster_status()
+        self.create_db_check_vgroups()
+        
+        # start writing constantly 
+        writing = threading.Thread(target = self.create_db_replica_3_insertdatas, args=(self.db_name , self.replica , self.vgroups , self.tb_nums , self.row_nums))
+        writing.start()
+        tdSql.query(" show {}.stables ".format(self.db_name))
+        while not tdSql.queryResult:
+            print(tdSql.queryResult)
+            time.sleep(0.1)
+            tdSql.query(" show {}.stables ".format(self.db_name))
+
+        restart_servers = threading.Thread(target = self.loop_restart_follower_constantly, args = (self.restart_server_times ,self.db_name))
+        restart_servers.start()
+
+        # reading = threading.Thread(target = self.loop_query_constantly, args=(1000,self.db_name , self.tb_nums , self.row_nums))
+        # reading.start()
+        
+        writing.join()
+        # reading.join()
+        restart_servers.join()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_follower.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_follower.py
new file mode 100644
index 0000000000..fdd5ec7d46
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_follower.py
@@ -0,0 +1,316 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import time
+import socket
+import subprocess ,threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 10
+        self.tb_nums = 10 
+        self.row_nums = 100
+        self.max_restart_time = 20
+        self.restart_server_times = 5
+        self.query_times = 100 
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_db_check_vgroups(self):
+
+        tdSql.execute("drop database if exists test")
+        tdSql.execute("create database if not exists test replica 1 duration 300")
+        tdSql.execute("use test")
+        tdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        tdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(5):
+            tdSql.execute("create table sub_tb_{} using stb1 tags({})".format(i,i))
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.query("show tables")
+        tdSql.checkRows(6)
+
+        tdSql.query("show test.vgroups;")
+        vgroups_infos = {}  # key is id: value is info list
+        for vgroup_info in tdSql.queryResult:
+            vgroup_id = vgroup_info[0]
+            tmp_list = []
+            for role in vgroup_info[3:-4]:
+                if role in ['leader','follower']:
+                    tmp_list.append(role)
+            vgroups_infos[vgroup_id]=tmp_list
+
+        for k , v in vgroups_infos.items():
+            if len(v) ==1 and v[0]=="leader":
+                tdLog.notice(" === create database replica only 1 role leader  check success of vgroup_id {} ======".format(k))
+            else:
+                tdLog.exit(" === create database replica only 1 role leader  check fail of vgroup_id {} ======".format(k))
+
+    def create_db_replica_3_insertdatas(self, dbname, replica_num ,vgroup_nums ,tb_nums , row_nums ):
+        newTdSql=tdCom.newTdSql()
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        newTdSql.execute(drop_db_sql)
+        newTdSql.execute(create_db_sql)
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        newTdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(tb_nums):
+            sub_tbname = "sub_tb_{}".format(i)
+            newTdSql.execute("create table {} using stb1 tags({})".format(sub_tbname,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                if row_num % (int(row_nums*0.1)) == 0 :
+                    tdLog.notice( " === database {} writing records {} rows".format(dbname , row_num ) )
+                ts = self.ts + 1000*row_num
+                newTdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== create database {} and insert rows execute end =====".format(dbname))
+
+    
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
+        tdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
+        for vgroup_info in vgroup_infos:
+            leader_infos = vgroup_info[3:-4] 
+            # print(vgroup_info)
+            for ind ,role in enumerate(leader_infos):
+                if role == dnode_role:
+                    # print(ind,leader_infos)
+                    self.stop_dnode_id = leader_infos[ind-1]
+                    break
+
+        return self.stop_dnode_id
+
+    def wait_stop_dnode_OK(self , newTdSql):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+
+        while status !="offline":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has stopped , id is {} ====".format(self.stop_dnode_id))
+
+    def wait_start_dnode_OK(self , newTdSql ):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="ready":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has restart , id is {} ====".format(self.stop_dnode_id))
+
+    def check_insert_status(self, newTdSql , dbname, tb_nums , row_nums):
+
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.query("select count(*) from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkData(0 , 0 , tb_nums*row_nums)
+        newTdSql.query("select distinct tbname from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkRows(tb_nums)
+
+    def loop_query_constantly(self, times ,  db_name, tb_nums ,row_nums):
+
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === query is going ,this is {}_th query === ".format(loop_time))
+            
+            self.check_insert_status( newTdSql ,db_name, tb_nums , row_nums)
+
+    
+    def loop_restart_follower_constantly(self, times , db_name):
+
+        tdDnodes = cluster.dnodes
+        newTdSql=tdCom.newTdSql()
+
+        for loop_time in range(times):
+
+            self.stop_dnode_id = self._get_stop_dnode_id(db_name , "follower")
+            
+            print(self.stop_dnode_id)
+            # begin stop dnode 
+            start = time.time()
+            tdDnodes[self.stop_dnode_id-1].stoptaosd()
+            self.wait_stop_dnode_OK(newTdSql)
+
+            tdLog.notice(" === this is {}_th restart taosd === ".format(loop_time))
+
+            # begin start dnode 
+            tdDnodes[self.stop_dnode_id-1].starttaosd()
+            self.wait_start_dnode_OK(newTdSql)
+            end = time.time()
+            time_cost = int(end -start)
+            if time_cost > self.max_restart_time:
+                tdLog.exit(" ==== restart dnode {} cost too much time , please check ====".format(self.stop_dnode_id))
+            
+
+
+    def run(self): 
+
+        self.check_setup_cluster_status()
+        self.create_db_check_vgroups()
+        
+        # start writing constantly 
+        writing = threading.Thread(target = self.create_db_replica_3_insertdatas, args=(self.db_name , self.replica , self.vgroups , self.tb_nums , self.row_nums))
+        writing.start()
+        tdSql.query(" show {}.stables ".format(self.db_name))
+        while not tdSql.queryResult:
+            print(tdSql.queryResult)
+            time.sleep(0.1)
+            tdSql.query(" show {}.stables ".format(self.db_name))
+
+        restart_servers = threading.Thread(target = self.loop_restart_follower_constantly, args = (self.restart_server_times ,self.db_name))
+        restart_servers.start()
+
+        reading = threading.Thread(target = self.loop_query_constantly, args=(self.query_times,self.db_name , self.tb_nums , self.row_nums))
+        reading.start()
+        
+        writing.join()
+        reading.join()
+        restart_servers.join()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_leader.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_leader.py
new file mode 100644
index 0000000000..cbb007d961
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_leader.py
@@ -0,0 +1,369 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import time
+import socket
+import subprocess ,threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 10
+        self.tb_nums = 10 
+        self.row_nums = 100
+        self.max_restart_time = 20
+        self.restart_server_times = 10 
+        self.query_times = 100
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_db_check_vgroups(self):
+
+        tdSql.execute("drop database if exists test")
+        tdSql.execute("create database if not exists test replica 1 duration 300")
+        tdSql.execute("use test")
+        tdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        tdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(5):
+            tdSql.execute("create table sub_tb_{} using stb1 tags({})".format(i,i))
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.query("show tables")
+        tdSql.checkRows(6)
+
+        tdSql.query("show test.vgroups;")
+        vgroups_infos = {}  # key is id: value is info list
+        for vgroup_info in tdSql.queryResult:
+            vgroup_id = vgroup_info[0]
+            tmp_list = []
+            for role in vgroup_info[3:-4]:
+                if role in ['leader','follower']:
+                    tmp_list.append(role)
+            vgroups_infos[vgroup_id]=tmp_list
+
+        for k , v in vgroups_infos.items():
+            if len(v) ==1 and v[0]=="leader":
+                tdLog.notice(" === create database replica only 1 role leader  check success of vgroup_id {} ======".format(k))
+            else:
+                tdLog.exit(" === create database replica only 1 role leader  check fail of vgroup_id {} ======".format(k))
+
+    def create_db_replica_3_insertdatas(self, dbname, replica_num ,vgroup_nums ,tb_nums , row_nums ):
+        newTdSql=tdCom.newTdSql()
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        newTdSql.execute(drop_db_sql)
+        newTdSql.execute(create_db_sql)
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        newTdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(tb_nums):
+            sub_tbname = "sub_tb_{}".format(i)
+            newTdSql.execute("create table {} using stb1 tags({})".format(sub_tbname,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                if row_num % (int(row_nums*0.1)) == 0 :
+                    tdLog.notice( " === database {} writing records {} rows".format(dbname , row_num ) )
+                ts = self.ts + 1000*row_num
+                newTdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== create database {} and insert rows execute end =====".format(dbname))
+
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
+        tdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
+        for vgroup_info in vgroup_infos:
+            leader_infos = vgroup_info[3:-4] 
+            # print(vgroup_info)
+            for ind ,role in enumerate(leader_infos):
+                if role == dnode_role:
+                    # print(ind,leader_infos)
+                    self.stop_dnode_id = leader_infos[ind-1]
+                    break
+
+        return self.stop_dnode_id
+
+    def wait_stop_dnode_OK(self , newTdSql):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+
+        while status !="offline":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has stopped , id is {} ====".format(self.stop_dnode_id))
+
+    def wait_start_dnode_OK(self , newTdSql ):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="ready":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has restart , id is {} ====".format(self.stop_dnode_id))
+
+    def get_leader_infos(self , newTdSql , dbname):
+        
+        # newTdSql=tdCom.newTdSql()
+        newTdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = newTdSql.queryResult
+
+        leader_infos = set()
+        for vgroup_info in vgroup_infos:
+            leader_infos.add(vgroup_info[3:-4])
+
+        return leader_infos
+
+    def check_revote_leader_success(self, dbname, before_leader_infos , after_leader_infos):
+
+        check_status = False
+        vote_act = set(set(after_leader_infos)-set(before_leader_infos))
+        if not vote_act:
+            print("=======before_revote_leader_infos ======\n" , before_leader_infos)
+            print("=======after_revote_leader_infos ======\n" , after_leader_infos)
+            tdLog.exit(" ===maybe revote not occured , there is no dnode offline ====")
+        else:
+            for vgroup_info in vote_act:
+                for ind , role in enumerate(vgroup_info):  
+                    if role==self.stop_dnode_id:
+
+                        if vgroup_info[ind+1] =="offline" and "leader" in vgroup_info:
+                            tdLog.notice(" === revote leader ok , leader is {} now   ====".format(vgroup_info[list(vgroup_info).index("leader")-1]))
+                            check_status = True
+                        elif vgroup_info[ind+1] !="offline":
+                            tdLog.notice(" === dnode {} should be offline ".format(self.stop_dnode_id))
+                        else:
+                            continue
+                        break
+        return check_status
+
+
+    def check_insert_status(self, newTdSql , dbname, tb_nums , row_nums):
+
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.query("select count(*) from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkData(0 , 0 , tb_nums*row_nums)
+        newTdSql.query("select distinct tbname from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkRows(tb_nums)
+
+    def loop_query_constantly(self, times ,  db_name, tb_nums ,row_nums):
+
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === query is going ,this is {}_th query === ".format(loop_time))
+            
+            self.check_insert_status( newTdSql ,db_name, tb_nums , row_nums)
+
+    
+    def loop_restart_follower_constantly(self, times , db_name):
+
+        tdDnodes = cluster.dnodes
+        newTdSql=tdCom.newTdSql()
+
+        for loop_time in range(times):
+
+            self.stop_dnode_id = self._get_stop_dnode_id(db_name , "leader")
+            
+            # print(self.stop_dnode_id)
+            # begin stop dnode 
+            start = time.time()
+
+            before_leader_infos = self.get_leader_infos( newTdSql ,db_name)
+            tdDnodes[self.stop_dnode_id-1].stoptaosd()
+            self.wait_stop_dnode_OK(newTdSql)
+
+            start = time.time()
+            # get leader info after stop 
+            after_leader_infos = self.get_leader_infos(newTdSql , db_name)
+             
+            revote_status = self.check_revote_leader_success(db_name ,before_leader_infos , after_leader_infos)
+
+            # append rows of stablename when dnode stop make sure revote leaders
+            
+            while not revote_status:
+                after_leader_infos = self.get_leader_infos(newTdSql , db_name)
+                revote_status = self.check_revote_leader_success(db_name ,before_leader_infos , after_leader_infos)
+
+            end = time.time()
+            time_cost = end - start 
+            tdLog.notice(" ==== revote leader of database {} cost time {}  ====".format(db_name , time_cost))
+
+            tdLog.notice(" === this is {}_th restart taosd === ".format(loop_time))
+
+            # begin start dnode 
+            tdDnodes[self.stop_dnode_id-1].starttaosd()
+            self.wait_start_dnode_OK(newTdSql)
+            end = time.time()
+            time_cost = int(end -start)
+            if time_cost > self.max_restart_time:
+                tdLog.exit(" ==== restart dnode {} cost too much time , please check ====".format(self.stop_dnode_id))
+            
+
+
+    def run(self): 
+
+        self.check_setup_cluster_status()
+        self.create_db_check_vgroups()
+        
+        # start writing constantly 
+        writing = threading.Thread(target = self.create_db_replica_3_insertdatas, args=(self.db_name , self.replica , self.vgroups , self.tb_nums , self.row_nums))
+        writing.start()
+        tdSql.query(" show {}.stables ".format(self.db_name))
+        while not tdSql.queryResult:
+            print(tdSql.queryResult)
+            time.sleep(0.1)
+            tdSql.query(" show {}.stables ".format(self.db_name))
+
+        restart_servers = threading.Thread(target = self.loop_restart_follower_constantly, args = (self.restart_server_times ,self.db_name))
+        restart_servers.start()
+
+        reading = threading.Thread(target = self.loop_query_constantly, args=(self.query_times,self.db_name , self.tb_nums , self.row_nums))
+        reading.start()
+        
+        writing.join()
+        reading.join()
+        restart_servers.join()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_all_dnodes.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_all_dnodes.py
new file mode 100644
index 0000000000..63c4942c9e
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_all_dnodes.py
@@ -0,0 +1,407 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import datetime
+import inspect
+import time
+import socket
+import subprocess
+import threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.ts_step =1000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 1
+        self.tb_nums = 10 
+        self.row_nums = 100
+        self.stop_dnode_id = None
+        self.loop_restart_times = 5
+        self.current_thread = None
+        self.max_restart_time = 10
+        self.try_check_times = 10
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_database(self, dbname, replica_num ,vgroup_nums ):
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        tdSql.execute(drop_db_sql)
+        tdSql.execute(create_db_sql)
+        tdSql.execute("use {}".format(dbname))
+       
+    def create_stable_insert_datas(self,dbname ,stablename , tb_nums , row_nums):
+        tdSql.execute("use {}".format(dbname))
+        tdSql.execute(
+        '''create table {}
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''.format(stablename)
+        )
+    
+        for i in range(tb_nums):
+            sub_tbname = "sub_{}_{}".format(stablename,i)
+            tdSql.execute("create table {} using {} tags({})".format(sub_tbname, stablename ,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                ts = self.ts + self.ts_step*row_num
+                tdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== stable {} insert rows execute end =====".format(stablename))
+    
+    def append_rows_of_exists_tables(self,dbname ,stablename , tbname , append_nums ):
+        
+        tdSql.execute("use {}".format(dbname))
+     
+        for row_num in range(append_nums):
+            tdSql.execute(f"insert into {tbname} values (now, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+            # print(f"insert into {tbname} values (now, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+        tdLog.notice(" ==== append new rows of table {} belongs to  stable {} execute end =====".format(tbname,stablename))
+        os.system("taos -s 'select count(*) from {}.{}';".format(dbname,stablename))
+
+    def check_insert_rows(self, dbname, stablename , tb_nums , row_nums, append_rows):
+    
+        tdSql.execute("use {}".format(dbname))
+        
+        tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+
+        while not tdSql.queryResult:
+            time.sleep(0.1)
+            tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+
+        status_OK = self.mycheckData("select count(*) from {}.{}".format(dbname,stablename) ,0 , 0 , tb_nums*row_nums+append_rows)
+        
+        count = 0 
+        while not status_OK :
+            if count > self.try_check_times:
+                os.system("taos -s ' show {}.vgroups; '".format(dbname))
+                tdLog.exit(" ==== check insert rows failed  after {}  try check {} times  of database {}".format(count , self.try_check_times ,dbname))
+                break
+            time.sleep(0.1)
+            tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+            while not tdSql.queryResult:
+                time.sleep(0.1)
+                tdSql.query("select count(*) from {}.{}".format(dbname,stablename))
+            status_OK = self.mycheckData("select count(*) from {}.{}".format(dbname,stablename) ,0 , 0 , tb_nums*row_nums+append_rows)
+            tdLog.debug(" ==== check insert rows first failed , this is {}_th retry check rows of database {}".format(count , dbname))
+            count += 1
+        
+
+        tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+        while not tdSql.queryResult:
+            time.sleep(0.1)
+            tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+        status_OK = self.mycheckRows("select distinct tbname from {}.{}".format(dbname,stablename) ,tb_nums)
+        count = 0 
+        while not status_OK :
+            if count > self.try_check_times:
+                os.system("taos -s ' show {}.vgroups;'".format(dbname))
+                tdLog.exit(" ==== check insert rows failed  after {}  try check {} times  of database {}".format(count , self.try_check_times ,dbname))
+                break
+            time.sleep(0.1)
+            tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+            while not tdSql.queryResult:
+                time.sleep(0.1)
+                tdSql.query("select distinct tbname from {}.{}".format(dbname,stablename))
+            status_OK = self.mycheckRows("select distinct tbname from {}.{}".format(dbname,stablename) ,tb_nums)
+            tdLog.debug(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
+            count += 1
+
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
+        tdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
+        for vgroup_info in vgroup_infos:
+            leader_infos = vgroup_info[3:-4] 
+            # print(vgroup_info)
+            for ind ,role in enumerate(leader_infos):
+                if role == dnode_role:
+                    # print(ind,leader_infos)
+                    self.stop_dnode_id = leader_infos[ind-1]
+                    break
+
+        return self.stop_dnode_id
+
+    def wait_stop_dnode_OK(self ,newTdSql ):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="offline":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has stopped , id is {} ====".format(self.stop_dnode_id))
+
+    def wait_start_dnode_OK(self , newTdSql):
+    
+        def _get_status():
+            # newTdSql=tdCom.newTdSql()
+            status =  ""
+            newTdSql.query("show dnodes")
+            dnode_infos = newTdSql.queryResult
+            for dnode_info in dnode_infos:
+                id = dnode_info[0]
+                dnode_status = dnode_info[4]
+                if id == self.stop_dnode_id:
+                    status = dnode_status
+                    break
+            return status 
+
+        status = _get_status()
+        while status !="ready":
+            time.sleep(0.1)
+            status = _get_status()
+            # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
+        tdLog.notice("==== stop_dnode has restart , id is {} ====".format(self.stop_dnode_id))
+
+    def _parse_datetime(self,timestr):
+        try:
+            return datetime.datetime.strptime(timestr, '%Y-%m-%d %H:%M:%S.%f')
+        except ValueError:
+            pass
+        try:
+            return datetime.datetime.strptime(timestr, '%Y-%m-%d %H:%M:%S')
+        except ValueError:
+            pass
+
+    def mycheckRowCol(self, sql, row, col):
+        caller = inspect.getframeinfo(inspect.stack()[2][0])
+        if row < 0:
+            args = (caller.filename, caller.lineno, sql, row)
+            tdLog.exit("%s(%d) failed: sql:%s, row:%d is smaller than zero" % args)
+        if col < 0:
+            args = (caller.filename, caller.lineno, sql, row)
+            tdLog.exit("%s(%d) failed: sql:%s, col:%d is smaller than zero" % args)
+        if row > tdSql.queryRows:
+            args = (caller.filename, caller.lineno, sql, row, tdSql.queryRows)
+            tdLog.exit("%s(%d) failed: sql:%s, row:%d is larger than queryRows:%d" % args)
+        if col > tdSql.queryCols:
+            args = (caller.filename, caller.lineno, sql, col, tdSql.queryCols)
+            tdLog.exit("%s(%d) failed: sql:%s, col:%d is larger than queryCols:%d" % args)
+
+    def mycheckData(self, sql ,row, col, data):
+        check_status = True
+        self.mycheckRowCol(sql ,row, col)
+        if tdSql.queryResult[row][col] != data:
+            if tdSql.cursor.istype(col, "TIMESTAMP"):
+                # suppose user want to check nanosecond timestamp if a longer data passed
+                if (len(data) >= 28):
+                    if pd.to_datetime(tdSql.queryResult[row][col]) == pd.to_datetime(data):
+                        tdLog.info("sql:%s, row:%d col:%d data:%d == expect:%s" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                else:
+                    if tdSql.queryResult[row][col] == self._parse_datetime(data):
+                        tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                return
+
+            if str(tdSql.queryResult[row][col]) == str(data):
+                tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                return
+            elif isinstance(data, float) and abs(tdSql.queryResult[row][col] - data) <= 0.000001:
+                tdLog.info("sql:%s, row:%d col:%d data:%f == expect:%f" %
+                            (sql, row, col, tdSql.queryResult[row][col], data))
+                return
+            else:
+                caller = inspect.getframeinfo(inspect.stack()[1][0])
+                args = (caller.filename, caller.lineno, sql, row, col, tdSql.queryResult[row][col], data)
+                tdLog.info("%s(%d) failed: sql:%s row:%d col:%d data:%s != expect:%s" % args)
+
+                check_status = False
+
+        if data is None:
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+        elif isinstance(data, str):
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+        # elif isinstance(data, datetime.date):
+        #     tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+        #                (sql, row, col, tdSql.queryResult[row][col], data))
+        elif isinstance(data, float):
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%s" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+        else:
+            tdLog.info("sql:%s, row:%d col:%d data:%s == expect:%d" %
+                       (sql, row, col, tdSql.queryResult[row][col], data))
+
+        return check_status
+
+    def mycheckRows(self, sql, expectRows):
+        check_status = True
+        if len(tdSql.queryResult) == expectRows:
+            tdLog.info("sql:%s, queryRows:%d == expect:%d" % (sql, len(tdSql.queryResult), expectRows))
+            return True
+        else:
+            caller = inspect.getframeinfo(inspect.stack()[1][0])
+            args = (caller.filename, caller.lineno, sql, len(tdSql.queryResult), expectRows)
+            tdLog.info("%s(%d) failed: sql:%s, queryRows:%d != expect:%d" % args)
+            check_status = False
+        return check_status
+
+    def stop_All(self):
+
+        tdDnodes = cluster.dnodes
+        # newTdSql=tdCom.newTdSql()
+        # ==== stop all dnode =====
+        for k ,v in self.dnode_list.items():
+            dnode_id = v[0]
+            tdDnodes[dnode_id-1].stoptaosd()
+            # self.wait_stop_dnode_OK(newTdSql)
+
+    def start_All(self):
+        tdDnodes = cluster.dnodes
+        # newTdSql=tdCom.newTdSql()
+        for k ,v in self.dnode_list.items():
+            dnode_id = v[0]
+            start = time.time()
+            tdDnodes[dnode_id-1].starttaosd()
+            # self.wait_start_dnode_OK(newTdSql)
+            end = time.time()
+            time_cost = int(end -start)
+            if time_cost > self.max_restart_time:
+                tdLog.exit(" ==== restart dnode {} cost too much time , please check ====".format(self.stop_dnode_id))
+
+
+        
+    def stop_All_dnodes_check_datas(self):
+
+        # stop follower and insert datas , update tables and create new stables
+        self.create_database(dbname = self.db_name ,replica_num= self.replica  , vgroup_nums= 1)
+        self.create_stable_insert_datas(dbname = self.db_name , stablename = "stb1" , tb_nums= self.tb_nums ,row_nums= self.row_nums )
+        self.check_insert_rows(self.db_name ,'stb1' ,tb_nums = self.tb_nums , row_nums= self.row_nums ,append_rows=0)
+        os.system(" taos -s ' select count(*) from {}.{}  ;'".format(self.db_name ,'stb1' ))
+
+        for i in range(self.loop_restart_times):
+            # begin to stop All taosd 
+            self.stop_All()
+            # begin to start All taosd
+            self.start_All()
+
+            tdLog.debug(" ==== cluster has restart , this is {}_th restart cluster  ==== ".format(i))
+
+            self.check_insert_rows(self.db_name ,'stb1' ,tb_nums = self.tb_nums , row_nums= self.row_nums ,append_rows=0)
+            os.system(" taos -s ' select count(*) from {}.{}  ;'".format(self.db_name ,'stb1' ))
+
+        self.append_rows_of_exists_tables(self.db_name ,"stb1" , "sub_stb1_0" , 100 )
+        os.system(" taos -s ' select count(*) from {}.{}  ;'".format(self.db_name ,'stb1' ))
+            
+
+    def run(self): 
+
+        # basic insert and check of cluster
+        self.check_setup_cluster_status()
+        self.stop_All_dnodes_check_datas()
+        
+        
+
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_sync.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_sync.py
index ce37f09d7d..c608c93f5e 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_sync.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_sync.py
@@ -220,25 +220,43 @@ class TDTestCase:
             status_OK = self.mycheckRows("select distinct tbname from {}.{}".format(dbname,stablename) ,tb_nums)
             tdLog.debug(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
-    def _get_stop_dnode_id(self,dbname):
+
+    
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='follower':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
+    def wait_stop_dnode_OK(self ,newTdSql):
+    
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -258,10 +276,11 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {} ====".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
 
+    def wait_start_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -369,12 +388,15 @@ class TDTestCase:
     def sync_run_case(self):
         # stop follower and insert datas , update tables and create new stables
         tdDnodes=cluster.dnodes
+        newTdSql =  tdCom.newTdSql()
         for loop in range(self.loop_restart_times):
             db_name = "sync_db_{}".format(loop)
             stablename = 'stable_{}'.format(loop)
             self.create_database(dbname = db_name ,replica_num= self.replica  , vgroup_nums= 1)
             self.create_stable_insert_datas(dbname = db_name , stablename = stablename , tb_nums= 10 ,row_nums= 10 )
-            self.stop_dnode_id = self._get_stop_dnode_id(db_name)
+
+            self.stop_dnode_id = self._get_stop_dnode_id(db_name , "follower")
+            
 
             # check rows of datas
 
@@ -384,7 +406,9 @@ class TDTestCase:
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].stoptaosd()
 
-            self.wait_stop_dnode_OK()
+        
+            self.wait_stop_dnode_OK(newTdSql)
+
 
             # append rows of stablename when dnode stop
 
@@ -402,7 +426,7 @@ class TDTestCase:
 
             # begin start dnode
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end -start)
             if time_cost > self.max_restart_time:
@@ -419,7 +443,7 @@ class TDTestCase:
         def _restart_dnode_of_db_unsync(dbname):
             start = time.time()
             tdDnodes=cluster.dnodes
-            self.stop_dnode_id = self._get_stop_dnode_id(dbname)
+            self.stop_dnode_id = self._get_stop_dnode_id(dbname ,"follower")
             # begin restart dnode
             tdDnodes[self.stop_dnode_id-1].stoptaosd()
             self.wait_stop_dnode_OK()
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync.py
index 8869b5d3a9..25c26c7288 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync.py
@@ -220,26 +220,42 @@ class TDTestCase:
             status_OK = self.mycheckRows("select distinct tbname from {}.{}".format(dbname,stablename) ,tb_nums)
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
+ 
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
 
-    def _get_stop_dnode_id(self,dbname):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='follower':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
-
+    def wait_stop_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -259,10 +275,10 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {}".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
+    def wait_start_dnode_OK(self ,newTdSql):
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -370,13 +386,16 @@ class TDTestCase:
     def sync_run_case(self):
         # stop follower and insert datas , update tables and create new stables
         tdDnodes=cluster.dnodes
+        newTdSql=tdCom.newTdSql()
         for loop in range(self.loop_restart_times):
             db_name = "sync_db_{}".format(loop)
             stablename = 'stable_{}'.format(loop)
             self.create_database(dbname = db_name ,replica_num= self.replica  , vgroup_nums= 1)
             self.create_stable_insert_datas(dbname = db_name , stablename = stablename , tb_nums= 10 ,row_nums= 10 )
-            self.stop_dnode_id = self._get_stop_dnode_id(db_name)
 
+            self.stop_dnode_id = self._get_stop_dnode_id(db_name ,"follower")
+            # print("dnode_id:" , self.stop_dnode_id )
+            
             # check rows of datas
 
             self.check_insert_rows(db_name ,stablename ,tb_nums=10 , row_nums= 10 ,append_rows=0)
@@ -384,8 +403,9 @@ class TDTestCase:
             # begin stop dnode
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].stoptaosd()
+        
+            self.wait_stop_dnode_OK(newTdSql)
 
-            self.wait_stop_dnode_OK()
 
             # append rows of stablename when dnode stop
 
@@ -403,7 +423,7 @@ class TDTestCase:
 
             # begin start dnode
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end -start)
             if time_cost > self.max_restart_time:
@@ -418,14 +438,16 @@ class TDTestCase:
     def unsync_run_case(self):
 
         def _restart_dnode_of_db_unsync(dbname):
+            newTdSql=tdCom.newTdSql()
             start = time.time()
             tdDnodes=cluster.dnodes
-            self.stop_dnode_id = self._get_stop_dnode_id(dbname)
+            self.stop_dnode_id = self._get_stop_dnode_id(dbname,"follower")
+            # print("dnode_id:" , self.stop_dnode_id )
             # begin restart dnode
             tdDnodes[self.stop_dnode_id-1].stoptaosd()
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync_force_stop.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync_force_stop.py
index 0241cb5e32..edff274793 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync_force_stop.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync_force_stop.py
@@ -221,25 +221,41 @@ class TDTestCase:
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
 
-    def _get_stop_dnode_id(self,dbname):
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='follower':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
+    def wait_stop_dnode_OK(self , newTdSql):
+    
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -259,10 +275,11 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {}".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
+    def wait_start_dnode_OK(self , newTdSql):
+    
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -370,12 +387,15 @@ class TDTestCase:
     def sync_run_case(self):
         # stop follower and insert datas , update tables and create new stables
         tdDnodes=cluster.dnodes
+        newTdSql=tdCom.newTdSql()
         for loop in range(self.loop_restart_times):
             db_name = "sync_db_{}".format(loop)
             stablename = 'stable_{}'.format(loop)
             self.create_database(dbname = db_name ,replica_num= self.replica  , vgroup_nums= 1)
             self.create_stable_insert_datas(dbname = db_name , stablename = stablename , tb_nums= 10 ,row_nums= 10 )
-            self.stop_dnode_id = self._get_stop_dnode_id(db_name)
+
+            self.stop_dnode_id = self._get_stop_dnode_id(db_name,"follower")
+            
 
             # check rows of datas
 
@@ -384,8 +404,8 @@ class TDTestCase:
             # begin stop dnode
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].forcestop()
-
-            self.wait_stop_dnode_OK()
+        
+            self.wait_stop_dnode_OK(newTdSql)
 
             # append rows of stablename when dnode stop
 
@@ -403,7 +423,7 @@ class TDTestCase:
 
             # begin start dnode
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end -start)
             if time_cost > self.max_restart_time:
@@ -420,17 +440,21 @@ class TDTestCase:
         def _restart_dnode_of_db_unsync(dbname):
             start = time.time()
             tdDnodes=cluster.dnodes
-            self.stop_dnode_id = self._get_stop_dnode_id(dbname)
+            newTdSql=tdCom.newTdSql()
+            self.stop_dnode_id = self._get_stop_dnode_id(dbname,"follower")
+            # print(self.stop_dnode_id)
             while not self.stop_dnode_id:
+                # print(self.stop_dnode_id)
                 time.sleep(0.5)
-                self.stop_dnode_id = self._get_stop_dnode_id(dbname)
+                self.stop_dnode_id = self._get_stop_dnode_id(dbname,"follower")
             # begin restart dnode
 
             # force stop taosd by kill -9
             self.force_stop_dnode(self.stop_dnode_id)
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
+            os.system(" taos -s 'show dnodes;' ")
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader.py
index df865e51fc..76bb2cc996 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader.py
@@ -177,26 +177,40 @@ class TDTestCase:
                 continue
 
 
-    def _get_stop_dnode_id(self,dbname):
-        newTdSql=tdCom.newTdSql()
-        newTdSql.query("show {}.vgroups".format(dbname))
-        vgroup_infos = newTdSql.queryResult
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
+        tdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='leader':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
-
+    def wait_stop_dnode_OK(self , newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -216,10 +230,10 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {}".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
-
+    def wait_start_dnode_OK(self,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -278,6 +292,9 @@ class TDTestCase:
         os.system(" {} -f {} >>/dev/null 2>&1 ".format(benchmark_build_path , json_file))
 
     def stop_leader_when_Benchmark_inserts(self,dbname , total_rows , json_file ):
+
+        newTdSql=tdCom.newTdSql()
+        
         # stop follower and insert datas , update tables and create new stables
         tdDnodes=cluster.dnodes
         tdSql.execute(" drop database if exists {} ".format(dbname))
@@ -316,7 +333,7 @@ class TDTestCase:
 
         tdLog.debug(" === database {} has write {} rows at least ====".format(dbname,total_rows/10))
 
-        self.stop_dnode_id = self._get_stop_dnode_id(dbname)
+        self.stop_dnode_id = self._get_stop_dnode_id(dbname ,"leader")
 
         # prepare stop leader of database
         before_leader_infos = self.get_leader_infos(dbname)
@@ -335,9 +352,9 @@ class TDTestCase:
         tdLog.debug(" ==== revote leader of database {} cost time {}  ====".format(dbname , time_cost))
 
         self.current_thread.join()
-
         tdDnodes[self.stop_dnode_id-1].starttaosd()
-        self.wait_start_dnode_OK()
+        self.wait_start_dnode_OK(newTdSql)
+        
 
         tdSql.query(" select count(*) from {}.{} ".format(dbname,"stb1"))
         tdLog.debug(" ==== expected insert  {} rows of database {}  , really is {}".format(total_rows, dbname , tdSql.queryResult[0][0]))
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader_forece_stop.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader_forece_stop.py
index 8d6f026165..6abe700bd6 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader_forece_stop.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader_forece_stop.py
@@ -33,10 +33,10 @@ class TDTestCase:
         self.tb_nums = 10
         self.row_nums = 100
         self.stop_dnode_id = None
-        self.loop_restart_times = 10
+        self.loop_restart_times = 5
         self.current_thread = None
         self.max_restart_time = 5
-
+        self.try_check_times = 10
     def getBuildPath(self):
         selfPath = os.path.dirname(os.path.realpath(__file__))
         if ("community" in selfPath):
@@ -304,26 +304,40 @@ class TDTestCase:
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
 
-    def _get_stop_dnode_id(self,dbname):
-        newTdSql=tdCom.newTdSql()
-        newTdSql.query("show {}.vgroups".format(dbname))
-        vgroup_infos = newTdSql.queryResult
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
+        tdSql.query("show {}.vgroups".format(dbname))
+        vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='leader':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
+    def wait_stop_dnode_OK(self ,newTdSql):
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -343,10 +357,11 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {}".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
+    def wait_start_dnode_OK(self,newTdSql):
+    
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -421,13 +436,15 @@ class TDTestCase:
     def sync_run_case(self):
         # stop follower and insert datas , update tables and create new stables
         tdDnodes=cluster.dnodes
+        newTdSql=tdCom.newTdSql()
         for loop in range(self.loop_restart_times):
             db_name = "sync_db_{}".format(loop)
             stablename = 'stable_{}'.format(loop)
             self.create_database(dbname = db_name ,replica_num= self.replica  , vgroup_nums= 1)
             self.create_stable_insert_datas(dbname = db_name , stablename = stablename , tb_nums= 10 ,row_nums= 10 )
-            self.stop_dnode_id = self._get_stop_dnode_id(db_name)
 
+            self.stop_dnode_id = self._get_stop_dnode_id(db_name ,"leader")
+            
             # check rows of datas
 
             self.check_insert_rows(db_name ,stablename ,tb_nums=10 , row_nums= 10 ,append_rows=0)
@@ -439,7 +456,7 @@ class TDTestCase:
             # force stop taosd by kill -9
             self.force_stop_dnode(self.stop_dnode_id)
 
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
 
             # vote leaders check
 
@@ -451,6 +468,7 @@ class TDTestCase:
             # append rows of stablename when dnode stop make sure revote leaders
 
             while not revote_status:
+                
                 after_leader_infos = self.get_leader_infos(db_name)
                 revote_status = self.check_revote_leader_success(db_name ,before_leader_infos , after_leader_infos)
 
@@ -473,7 +491,7 @@ class TDTestCase:
             # begin start dnode
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end -start)
             if time_cost > self.max_restart_time:
@@ -490,14 +508,15 @@ class TDTestCase:
         def _restart_dnode_of_db_unsync(dbname):
 
             tdDnodes=cluster.dnodes
-            self.stop_dnode_id = self._get_stop_dnode_id(dbname)
+            newTdSql=tdCom.newTdSql()
+            self.stop_dnode_id = self._get_stop_dnode_id(dbname ,"leader" )
             # begin restart dnode
             # force stop taosd by kill -9
             # get leader info before stop
             before_leader_infos = self.get_leader_infos(db_name)
             self.force_stop_dnode(self.stop_dnode_id)
 
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
 
             # check revote leader when restart servers
             # get leader info after stop
@@ -529,7 +548,7 @@ class TDTestCase:
 
             tdDnodes[self.stop_dnode_id-1].starttaosd()
             start = time.time()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_mnode3_insertdatas_querys.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_mnode3_insertdatas_querys.py
new file mode 100644
index 0000000000..ed20a51595
--- /dev/null
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_mnode3_insertdatas_querys.py
@@ -0,0 +1,218 @@
+# author : wenzhouwww
+from ssl import ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
+import taos
+import sys
+import time
+import os 
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import TDDnodes
+from util.dnodes import TDDnode
+from util.cluster import *
+
+import time
+import socket
+import subprocess ,threading
+sys.path.append(os.path.dirname(__file__))
+
+class TDTestCase:
+    def init(self,conn ,logSql):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+        self.host = socket.gethostname()
+        self.mnode_list = {}
+        self.dnode_list = {}
+        self.ts = 1483200000000
+        self.db_name ='testdb'
+        self.replica = 3 
+        self.vgroups = 1
+        self.tb_nums = 10 
+        self.row_nums = 1000
+        self.query_times = 100
+
+    def getBuildPath(self):
+        selfPath = os.path.dirname(os.path.realpath(__file__))
+        if ("community" in selfPath):
+            projPath = selfPath[:selfPath.find("community")]
+        else:
+            projPath = selfPath[:selfPath.find("tests")]
+
+        for root, dirs, files in os.walk(projPath):
+            if ("taosd" in files):
+                rootRealPath = os.path.dirname(os.path.realpath(root))
+                if ("packaging" not in rootRealPath):
+                    buildPath = root[:len(root) - len("/build/bin")]
+                    break
+        return buildPath
+
+    def check_setup_cluster_status(self):
+        tdSql.query("show mnodes")
+        for mnode in tdSql.queryResult:
+            name = mnode[1]
+            info = mnode
+            self.mnode_list[name] = info
+
+        tdSql.query("show dnodes")
+        for dnode in tdSql.queryResult:
+            name = dnode[1]
+            info = dnode
+            self.dnode_list[name] = info
+
+        count = 0
+        is_leader = False
+        mnode_name = ''
+        for k,v in self.mnode_list.items():
+            count +=1
+            # only for 1 mnode
+            mnode_name = k
+
+            if v[2] =='leader':
+                is_leader=True
+
+        if count==1 and is_leader:
+            tdLog.notice("===== depoly cluster success with 1 mnode as leader =====")
+        else:
+            tdLog.exit("===== depoly cluster fail with 1 mnode as leader =====")
+
+        for k ,v in self.dnode_list.items():
+            if k == mnode_name:
+                if v[3]==0:
+                    tdLog.notice("===== depoly cluster mnode only success at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+                else:
+                    tdLog.exit("===== depoly cluster mnode only fail at {} , support_vnodes is {} ".format(mnode_name,v[3]))
+            else:
+                continue
+
+    def create_db_check_vgroups(self):
+
+        tdSql.execute("drop database if exists test")
+        tdSql.execute("create database if not exists test replica 1 duration 300")
+        tdSql.execute("use test")
+        tdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        tdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(5):
+            tdSql.execute("create table sub_tb_{} using stb1 tags({})".format(i,i))
+        tdSql.query("show stables")
+        tdSql.checkRows(1)
+        tdSql.query("show tables")
+        tdSql.checkRows(6)
+
+        tdSql.query("show test.vgroups;")
+        vgroups_infos = {}  # key is id: value is info list
+        for vgroup_info in tdSql.queryResult:
+            vgroup_id = vgroup_info[0]
+            tmp_list = []
+            for role in vgroup_info[3:-4]:
+                if role in ['leader','follower']:
+                    tmp_list.append(role)
+            vgroups_infos[vgroup_id]=tmp_list
+
+        for k , v in vgroups_infos.items():
+            if len(v) ==1 and v[0]=="leader":
+                tdLog.notice(" === create database replica only 1 role leader  check success of vgroup_id {} ======".format(k))
+            else:
+                tdLog.exit(" === create database replica only 1 role leader  check fail of vgroup_id {} ======".format(k))
+
+    def create_db_replica_3_insertdatas(self, dbname, replica_num ,vgroup_nums ,tb_nums , row_nums ):
+        newTdSql=tdCom.newTdSql()
+        drop_db_sql = "drop database if exists {}".format(dbname)
+        create_db_sql = "create database {} replica {} vgroups {}".format(dbname,replica_num,vgroup_nums)
+
+        tdLog.notice(" ==== create database {} and insert rows begin =====".format(dbname))
+        newTdSql.execute(drop_db_sql)
+        newTdSql.execute(create_db_sql)
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.execute(
+        '''create table stb1
+        (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+        tags (t1 int)
+        '''
+        )
+        newTdSql.execute(
+            '''
+            create table t1
+            (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(32),c9 nchar(32), c10 timestamp)
+            '''
+        )
+        
+        for i in range(tb_nums):
+            sub_tbname = "sub_tb_{}".format(i)
+            newTdSql.execute("create table {} using stb1 tags({})".format(sub_tbname,i))
+            # insert datas about new database
+
+            for row_num in range(row_nums):
+                ts = self.ts + 1000*row_num
+                newTdSql.execute(f"insert into {sub_tbname} values ({ts}, {row_num} ,{row_num}, 10 ,1 ,{row_num} ,{row_num},true,'bin_{row_num}','nchar_{row_num}',now) ")
+
+        tdLog.notice(" ==== create database {} and insert rows execute end =====".format(dbname))
+
+    
+
+    def check_insert_status(self,newTdSql , dbname, tb_nums , row_nums):
+        # newTdSql=tdCom.newTdSql()
+        newTdSql.execute("use {}".format(dbname))
+        newTdSql.query("select count(*) from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkData(0 , 0 , tb_nums*row_nums)
+        newTdSql.query("select distinct tbname from {}.{}".format(dbname,'stb1'))
+        # tdSql.checkRows(tb_nums)
+
+    def loop_query_constantly(self, times ,  db_name, tb_nums ,row_nums):
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === query is going ,this is {}_th query === ".format(loop_time))
+            self.check_insert_status( newTdSql ,db_name, tb_nums , row_nums)
+
+    def loop_create_databases(self, times , tb_nums , row_nums):
+        newTdSql=tdCom.newTdSql()
+        for loop_time in range(times):
+            tdLog.debug(" === create database and insert datas is going ,this is {}_th create === ".format(loop_time))
+            db_name = 'loop_db_{}'.format(loop_time)
+            self.create_db_replica_3_insertdatas(db_name , self.replica , self.vgroups , tb_nums , row_nums)
+            self.check_insert_status( newTdSql ,db_name, tb_nums , row_nums)
+
+    def run(self): 
+        self.check_setup_cluster_status()
+        self.create_db_check_vgroups()
+
+        # create mnode 
+        tdSql.execute("create mnode on dnode 2 ")
+        tdSql.execute("create mnode on dnode 3 ")
+        os.system("taos -s 'show mnodes;'")
+        # start writing constantly 
+        writing = threading.Thread(target = self.create_db_replica_3_insertdatas, args=(self.db_name , self.replica , self.vgroups , self.tb_nums , self.row_nums))
+        writing.start()
+        tdSql.query(" show {}.stables ".format(self.db_name))
+        while not tdSql.queryResult:
+            print(tdSql.queryResult)
+            time.sleep(0.1)
+            tdSql.query(" show {}.stables ".format(self.db_name))
+
+        reading = threading.Thread(target = self.loop_query_constantly, args=(self.query_times,self.db_name , self.tb_nums , self.row_nums))
+        reading.start()
+
+        create_db = threading.Thread(target = self.loop_create_databases, args=(5, 10 , 10))
+        create_db.start()
+        
+        writing.join()
+        reading.join()
+        create_db.join()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
\ No newline at end of file
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower.py
index 4b404a5906..d60817a2b4 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower.py
@@ -182,25 +182,40 @@ class TDTestCase:
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
 
-    def _get_stop_dnode_id(self,dbname):
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='follower':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
-
+    def wait_stop_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -220,10 +235,10 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {}".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
-
+    def wait_start_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -372,22 +387,24 @@ class TDTestCase:
     def stop_follower_when_query_going(self):
 
         tdDnodes = cluster.dnodes
+        newTdSql=tdCom.newTdSql()
         self.create_database(dbname = self.db_name ,replica_num= self.replica  , vgroup_nums= 1)
         self.create_stable_insert_datas(dbname = self.db_name , stablename = "stb1" , tb_nums= self.tb_nums ,row_nums= self.row_nums)
 
-        # let query task start
-        self.thread_list = self.multi_thread_query_task(10 ,self.db_name ,'stb1' )
+        # let query task start 
+        self.thread_list = self.multi_thread_query_task(5 ,self.db_name ,'stb1' )
+
 
         # force stop follower
         for loop in range(self.loop_restart_times):
             tdLog.debug(" ==== this is {}_th restart follower of database {} ==== ".format(loop ,self.db_name))
-            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name)
+            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name,"follower" )
             tdDnodes[self.stop_dnode_id-1].stoptaosd()
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
 
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
@@ -406,8 +423,6 @@ class TDTestCase:
 
 
 
-
-
     def stop(self):
         tdSql.close()
         tdLog.success(f"{__file__} successfully executed")
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower_force_stop.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower_force_stop.py
index 8310522bd9..da9dc115eb 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower_force_stop.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower_force_stop.py
@@ -182,25 +182,40 @@ class TDTestCase:
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
 
-    def _get_stop_dnode_id(self,dbname):
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='follower':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
+    def wait_stop_dnode_OK(self ,newTdSql):
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -220,10 +235,10 @@ class TDTestCase:
             # tdLog.notice("==== stop dnode has not been stopped , endpoint is {}".format(self.stop_dnode))
         tdLog.notice("==== stop_dnode has stopped , id is {}".format(self.stop_dnode_id))
 
-    def wait_start_dnode_OK(self):
-
+    def wait_start_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -379,15 +394,16 @@ class TDTestCase:
         self.thread_list = self.multi_thread_query_task(10 ,self.db_name ,'stb1' )
 
         # force stop follower
+        newTdSql=tdCom.newTdSql()
         for loop in range(self.loop_restart_times):
             tdLog.debug(" ==== this is {}_th restart follower of database {} ==== ".format(loop ,self.db_name))
-            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name)
+            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name,"follower" )
             self.force_stop_dnode(self.stop_dnode_id)
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
 
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
@@ -405,9 +421,6 @@ class TDTestCase:
         self.stop_follower_when_query_going()
 
 
-
-
-
     def stop(self):
         tdSql.close()
         tdLog.success(f"{__file__} successfully executed")
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader.py
index 752a347d83..561159af89 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader.py
@@ -182,25 +182,40 @@ class TDTestCase:
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
 
-    def _get_stop_dnode_id(self,dbname):
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='leader':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
-
+    def wait_stop_dnode_OK(self,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -242,10 +257,11 @@ class TDTestCase:
                         break
         return check_status
 
-    def wait_start_dnode_OK(self):
 
+    def wait_start_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -349,11 +365,11 @@ class TDTestCase:
             tdLog.info("%s(%d) failed: sql:%s, queryRows:%d != expect:%d" % args)
             check_status = False
         return check_status
-
-
-    def get_leader_infos(self ,dbname):
-
-        newTdSql=tdCom.newTdSql()
+        
+    
+    def get_leader_infos(self , newTdSql ,dbname):
+        
+        
         newTdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = newTdSql.queryResult
 
@@ -409,39 +425,39 @@ class TDTestCase:
         self.create_database(dbname = self.db_name ,replica_num= self.replica  , vgroup_nums= 1)
         self.create_stable_insert_datas(dbname = self.db_name , stablename = "stb1" , tb_nums= self.tb_nums ,row_nums= self.row_nums)
 
-        # let query task start
-        self.thread_list = self.multi_thread_query_task(10 ,self.db_name ,'stb1' )
+        # let query task start 
+        self.thread_list = self.multi_thread_query_task(2 ,self.db_name ,'stb1' )
 
+        newTdSql=tdCom.newTdSql()
         # force stop follower
         for loop in range(self.loop_restart_times):
             tdLog.debug(" ==== this is {}_th restart follower of database {} ==== ".format(loop ,self.db_name))
 
-            # get leader info before stop
-            before_leader_infos = self.get_leader_infos(self.db_name)
+            # get leader info before stop 
+            before_leader_infos = self.get_leader_infos(newTdSql , self.db_name)
 
-            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name)
+            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name,"leader")
             tdDnodes[self.stop_dnode_id-1].stoptaosd()
 
-
             start = time.time()
-            # get leader info after stop
-            after_leader_infos = self.get_leader_infos(self.db_name)
-
+            # get leader info after stop 
+            after_leader_infos = self.get_leader_infos(newTdSql , self.db_name)
+            
             revote_status = self.check_revote_leader_success(self.db_name ,before_leader_infos , after_leader_infos)
 
             while not revote_status:
-                after_leader_infos = self.get_leader_infos(self.db_name)
+                after_leader_infos = self.get_leader_infos(newTdSql , self.db_name)
                 revote_status = self.check_revote_leader_success(self.db_name ,before_leader_infos , after_leader_infos)
 
             end = time.time()
             time_cost = end - start
             tdLog.debug(" ==== revote leader of database {} cost time {}  ====".format(self.db_name , time_cost))
 
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
 
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
@@ -459,9 +475,6 @@ class TDTestCase:
         self.stop_follower_when_query_going()
 
 
-
-
-
     def stop(self):
         tdSql.close()
         tdLog.success(f"{__file__} successfully executed")
diff --git a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader_force_stop.py b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader_force_stop.py
index 9f64faa446..fb0ddd5435 100644
--- a/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader_force_stop.py
+++ b/tests/system-test/6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader_force_stop.py
@@ -182,25 +182,40 @@ class TDTestCase:
             tdLog.notice(" ==== check insert tbnames first failed , this is {}_th retry check tbnames of database {}".format(count , dbname))
             count += 1
 
-    def _get_stop_dnode_id(self,dbname):
+    def _get_stop_dnode_id(self,dbname ,dnode_role):
         tdSql.query("show {}.vgroups".format(dbname))
         vgroup_infos = tdSql.queryResult
+        status = False
+        for vgroup_info in vgroup_infos:
+            if "error" not in vgroup_info:
+                status = True
+            else:
+                status = False
+        while status!=True :
+            time.sleep(0.1)
+            tdSql.query("show {}.vgroups".format(dbname))
+            vgroup_infos = tdSql.queryResult
+            for vgroup_info in vgroup_infos:
+                if "error" not in vgroup_info:
+                    status = True
+                else:
+                    status = False
+            # print(status)
         for vgroup_info in vgroup_infos:
             leader_infos = vgroup_info[3:-4]
             # print(vgroup_info)
             for ind ,role in enumerate(leader_infos):
-                if role =='leader':
+                if role == dnode_role:
                     # print(ind,leader_infos)
                     self.stop_dnode_id = leader_infos[ind-1]
                     break
 
-
         return self.stop_dnode_id
 
-    def wait_stop_dnode_OK(self):
+    def wait_stop_dnode_OK(self ,newTdSql):
 
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
 
             status =  ""
             newTdSql.query("show dnodes")
@@ -242,10 +257,10 @@ class TDTestCase:
                         break
         return check_status
 
-    def wait_start_dnode_OK(self):
-
+    def wait_start_dnode_OK(self ,newTdSql):
+    
         def _get_status():
-            newTdSql=tdCom.newTdSql()
+            # newTdSql=tdCom.newTdSql()
             status =  ""
             newTdSql.query("show dnodes")
             dnode_infos = newTdSql.queryResult
@@ -406,11 +421,13 @@ class TDTestCase:
     def stop_follower_when_query_going(self):
 
         tdDnodes = cluster.dnodes
+        newTdSql=tdCom.newTdSql()
         self.create_database(dbname = self.db_name ,replica_num= self.replica  , vgroup_nums= 1)
         self.create_stable_insert_datas(dbname = self.db_name , stablename = "stb1" , tb_nums= self.tb_nums ,row_nums= self.row_nums)
 
-        # let query task start
-        self.thread_list = self.multi_thread_query_task(10 ,self.db_name ,'stb1' )
+        # let query task start 
+        self.thread_list = self.multi_thread_query_task(5 ,self.db_name ,'stb1' )
+
 
         # force stop follower
         for loop in range(self.loop_restart_times):
@@ -419,7 +436,7 @@ class TDTestCase:
             # get leader info before stop
             before_leader_infos = self.get_leader_infos(self.db_name)
 
-            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name)
+            self.stop_dnode_id = self._get_stop_dnode_id(self.db_name ,"leader")
             self.force_stop_dnode(self.stop_dnode_id)
 
 
@@ -437,11 +454,11 @@ class TDTestCase:
             time_cost = end - start
             tdLog.debug(" ==== revote leader of database {} cost time {}  ====".format(self.db_name , time_cost))
 
-            self.wait_stop_dnode_OK()
+            self.wait_stop_dnode_OK(newTdSql)
 
             start = time.time()
             tdDnodes[self.stop_dnode_id-1].starttaosd()
-            self.wait_start_dnode_OK()
+            self.wait_start_dnode_OK(newTdSql)
             end = time.time()
             time_cost = int(end-start)
 
diff --git a/tests/system-test/clusterCase.sh b/tests/system-test/clusterCase.sh
index cfc44f7f95..a4bec11d03 100755
--- a/tests/system-test/clusterCase.sh
+++ b/tests/system-test/clusterCase.sh
@@ -19,4 +19,28 @@ python3 ./test.py -f 6-cluster/5dnode3mnodeSep1VnodeStopMnodeCreateStb.py  -N 5
 # python3 ./test.py -f 6-cluster/5dnode3mnodeRestartDnodeInsertData.py -N 5 -M 3
  python3 ./test.py -f 6-cluster/5dnode3mnodeAdd1Ddnoe.py -N 6 -M 3 -C 5 
 
- 
+# test case of vnode 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_createDb_replica1.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_vgroups.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_vgroups_stopOne.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_sync.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync_force_stop.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader_forece_stop.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower.py  -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower_force_stop.py  -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader_force_stop.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas_querys.py -N 4 -M 1 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys.py -N 4 -M 1 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_follower.py -N 4 -M 1 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_leader.py -N 4 -M 1
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_all_vnode.py   -N 4 -M 1 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_all_dnodes.py -N 4 -M 1 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_force_stop_all_dnodes.py -N 4 -M 1 
+python3 ./test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_mnode3_insertdatas_querys.py -N 4 -M 1
+
diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index 7a3ad1070c..75e3664bbd 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -193,6 +193,30 @@ python3 ./test.py -f 6-cluster/5dnode3mnodeRecreateMnode.py  -N 5 -M 3
 python3 ./test.py -f 6-cluster/5dnode3mnodeStopFollowerLeader.py  -N 5 -M 3 
 python3 ./test.py -f 6-cluster/5dnode3mnodeStop2Follower.py  -N 5 -M 3 
 
+# vnode case 
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_createDb_replica1.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica1_insertdatas_querys.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_force_stop_all_dnodes.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_all_vnode.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_follower.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys_loop_restart_leader.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_querys.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_all_dnodes.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_sync.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync_force_stop.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_follower_unsync.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader_forece_stop.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_insertdatas_stop_leader.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_mnode3_insertdatas_querys.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower_force_stop.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_follower.py -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader_force_stop.py -N 4 -M 1 
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_querydatas_stop_leader.py -N 4 -M 1 
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_vgroups.py  -N 4 -M 1
+# python3 test.py -f 6-cluster/vnode/4dnode1mnode_basic_replica3_vgroups_stopOne.py -N 4 -M 1
+
 
 python3 ./test.py -f 7-tmq/dropDbR3ConflictTransaction.py -N 3
 python3 ./test.py -f 7-tmq/basic5.py