diff --git a/tests/system-test/0-others/splitVGroup.py b/tests/system-test/0-others/splitVGroup.py
index 32001f34b09566acd5f1faa6d7358dc1ce1ac150..450996106608aa60cec781392bec8f9463ff2171 100644
--- a/tests/system-test/0-others/splitVGroup.py
+++ b/tests/system-test/0-others/splitVGroup.py
@@ -328,9 +328,28 @@ class TDTestCase:
         tdLog.exit("split vgroup transaction is not finished after executing 50s")
         return False
 
+    # split error 
+    def expectSplitError(self, dbName):
+        vgids = self.getVGroup(dbName)
+        selid = random.choice(vgids)
+        sql = f"split vgroup {selid}"
+        tdLog.info(sql)
+        tdSql.error(sql)    
+
+    # expect split ok
+    def expectSplitOk(self, dbName):
+        # split vgroup
+        vgList1 = self.getVGroup(dbName)
+        self.splitVGroup(dbName)
+        vgList2 = self.getVGroup(dbName)
+        vgNum1 = len(vgList1) + 1
+        vgNum2 = len(vgList2)
+        if vgNum1 != vgNum2:
+            tdLog.exit(f" vglist len={vgNum1} is not same for expect {vgNum2}")
+            return
+
     # split empty database
-    def splitEmptyDB(self):
-        
+    def splitEmptyDB(self):        
         dbName = "emptydb"
         vgNum = 2
         # create database
@@ -339,17 +358,33 @@ class TDTestCase:
         tdSql.execute(sql)
 
         # split vgroup
-        self.splitVGroup(dbName)
-        vgList = self.getVGroup(dbName)
-        vgNum1 = len(vgList)
-        vgNum2 = vgNum + 1
-        if vgNum1 != vgNum2:
-            tdLog.exit(f" vglist len={vgNum1} is not same for expect {vgNum2}")
-            return
+        self.expectSplitOk(dbName)
+
+
+    # forbid
+    def checkForbid(self):
+        # stream
+        tdLog.info("check forbid split having stream...")
+        tdSql.execute("create database streamdb;")
+        tdSql.execute("use streamdb;")
+        tdSql.execute("create table ta(ts timestamp, age int);")
+        tdSql.execute("create stream ma into sta as select count(*) from ta interval(1s);")
+        self.expectSplitError("streamdb")
+        tdSql.execute("drop stream ma;")
+        self.expectSplitOk("streamdb")
+
+        # topic
+        tdLog.info("check forbid split having topic...")
+        tdSql.execute("create database topicdb wal_retention_period 10;")
+        tdSql.execute("use topicdb;")
+        tdSql.execute("create table ta(ts timestamp, age int);")
+        tdSql.execute("create topic toa as select * from ta;")
+        self.expectSplitError("topicdb")
+        tdSql.execute("drop topic toa;")
+        self.expectSplitOk("topicdb")
 
     # run
     def run(self):
-        
         # prepare env
         self.prepareEnv()
 
@@ -360,12 +395,13 @@ class TDTestCase:
 
             # check two db query result same
             self.checkResult()
-
             tdLog.info(f"split vgroup i={i} passed.")
 
         # split empty db
-        self.splitEmptyDB()    
+        self.splitEmptyDB()
 
+        # check topic and stream forib
+        self.checkForbid()
 
     # stop
     def stop(self):
diff --git a/tests/system-test/eco-system/util/Consumer.py b/tests/system-test/eco-system/util/Consumer.py
new file mode 100644
index 0000000000000000000000000000000000000000..b483253a9582efe7202ff90de22c855f87fcee3b
--- /dev/null
+++ b/tests/system-test/eco-system/util/Consumer.py
@@ -0,0 +1,82 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+#
+#  The option for wal_retetion_period and wal_retention_size is work well
+#
+
+import taos
+from taos.tmq import Consumer
+
+import os
+import sys
+import threading
+import json
+import time
+from datetime import date
+from datetime import datetime
+from datetime import timedelta
+from os       import path
+
+
+# consume topic 
+def consume_topic(topic_name, consume_cnt, wait):
+    print("start consume...")
+    consumer = Consumer(
+        {
+            "group.id": "tg2",
+            "td.connect.user": "root",
+            "td.connect.pass": "taosdata",
+            "enable.auto.commit": "true",
+        }
+    )
+    print("start subscrite...")
+    consumer.subscribe([topic_name])
+
+    cnt = 0
+    try:
+        while True and cnt < consume_cnt:
+            res = consumer.poll(1)
+            if not res:
+                if wait:
+                    continue
+                else:
+                    break
+            err = res.error()
+            if err is not None:
+                raise err
+            val = res.value()
+            cnt += 1
+            print(f" consume {cnt} ")
+            for block in val:
+                print(block.fetchall())
+    finally:
+        consumer.unsubscribe()
+        consumer.close()
+
+
+if __name__ == "__main__":
+    print(sys.argv)
+    if len(sys.argv) < 2:
+
+        print(" please input topic name for consume . -c for wait")
+    else:
+        wait = False
+        if "-c" == sys.argv[1]:
+           wait = True
+           topic = sys.argv[2]
+        else:
+           topic = sys.argv[1]
+
+        print(f' wait={wait} topic={topic}')        
+        consume_topic(topic, 10000000, wait)
\ No newline at end of file
diff --git a/tests/system-test/eco-system/util/restartDnodes.py b/tests/system-test/eco-system/util/restartDnodes.py
new file mode 100644
index 0000000000000000000000000000000000000000..feee260fdf49957577a2204831de54e8183b222c
--- /dev/null
+++ b/tests/system-test/eco-system/util/restartDnodes.py
@@ -0,0 +1,84 @@
+import time
+import os
+import subprocess
+import random
+import platform
+
+class dnode():
+    def __init__(self, pid, path):
+        self.pid  = pid
+        self.path = path
+
+# run exePath no wait finished
+def runNoWait(exePath):
+    if platform.system().lower() == 'windows':
+        cmd = f"mintty -h never {exePath}"
+    else:
+        cmd = f"nohup {exePath} > /dev/null 2>&1 & "
+
+    if os.system(cmd) != 0:
+        return False
+    else:
+        return True
+
+# get online dnodes
+def getDnodes():
+    cmd = "ps aux | grep taosd | awk '{{print $2,$11,$12,$13}}'"
+    result = os.system(cmd)
+    result=subprocess.check_output(cmd,shell=True)
+    strout = result.decode('utf-8').split("\n")
+    dnodes = []
+
+    for line in strout:
+        cols = line.split(' ')
+        if len(cols) != 4:
+            continue
+        exepath = cols[1]
+        if len(exepath) < 5 :
+            continue
+        if exepath[-5:] != 'taosd':
+            continue
+
+        # add to list
+        path = cols[1] + " " + cols[2] + " " + cols[3]
+        dnodes.append(dnode(cols[0], path))
+
+    print(" show dnodes cnt=%d...\n"%(len(dnodes)))
+    for dn in dnodes:
+        print(f"  pid={dn.pid} path={dn.path}")
+
+    return dnodes
+
+def restartDnodes(dnodes, cnt, seconds):
+    print(f"start dnode cnt={cnt} wait={seconds}s")
+    selects = random.sample(dnodes, cnt)
+    for select in selects:
+        print(f" kill -9 {select.pid}")
+        cmd = f"kill -9 {select.pid}"
+        os.system(cmd)
+        print(f" restart {select.path}")
+        if runNoWait(select.path) == False:
+            print(f"run {select.path} failed.")
+            raise Exception("exe failed.")
+        print(f" sleep {seconds}s ...")
+        time.sleep(seconds)
+
+def run():
+    # kill seconds interval
+    killLoop = 10
+    minKill = 1
+    maxKill = 10
+    for i in range(killLoop):
+        dnodes = getDnodes()
+        killCnt = 0
+        if len(dnodes) > 0:
+            killCnt = random.randint(1, len(dnodes))
+            restartDnodes(dnodes, killCnt, random.randint(1, 5))
+
+        seconds = random.randint(minKill, maxKill)
+        print(f"----------- kill loop i={i} killCnt={killCnt} done. do sleep {seconds}s ... \n")
+        time.sleep(seconds)
+
+
+if __name__ == '__main__':
+    run()
\ No newline at end of file