diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index 6318f2e3f2..755ca09199 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -123,6 +123,11 @@ typedef enum {
   TRN_POLICY_RETRY = 1,
 } ETrnPolicy;
 
+typedef enum {
+  TRN_EXEC_PARALLEL = 0,
+  TRN_EXEC_ONE_BY_ONE = 1,
+} ETrnExecType;
+
 typedef enum {
   DND_REASON_ONLINE = 0,
   DND_REASON_STATUS_MSG_TIMEOUT,
@@ -151,6 +156,7 @@ typedef struct {
   ETrnStage      stage;
   ETrnPolicy     policy;
   ETrnType       type;
+  ETrnExecType   parallel;
   int32_t        code;
   int32_t        failedTimes;
   SRpcHandleInfo rpcInfo;
diff --git a/source/dnode/mnode/impl/inc/mndTrans.h b/source/dnode/mnode/impl/inc/mndTrans.h
index 84e7a17192..84bed13e2e 100644
--- a/source/dnode/mnode/impl/inc/mndTrans.h
+++ b/source/dnode/mnode/impl/inc/mndTrans.h
@@ -57,6 +57,7 @@ int32_t mndTransAppendUndoAction(STrans *pTrans, STransAction *pAction);
 void    mndTransSetRpcRsp(STrans *pTrans, void *pCont, int32_t contLen);
 void    mndTransSetCb(STrans *pTrans, ETrnFuncType startFunc, ETrnFuncType stopFunc, void *param, int32_t paramLen);
 void    mndTransSetDbInfo(STrans *pTrans, SDbObj *pDb);
+void    mndTransSetExecOneByOne(STrans *pTrans);
 
 int32_t mndTransPrepare(SMnode *pMnode, STrans *pTrans);
 void    mndTransProcessRsp(SRpcMsg *pRsp);
diff --git a/source/dnode/mnode/impl/src/mndMnode.c b/source/dnode/mnode/impl/src/mndMnode.c
index 82e6256295..344b4f6263 100644
--- a/source/dnode/mnode/impl/src/mndMnode.c
+++ b/source/dnode/mnode/impl/src/mndMnode.c
@@ -312,25 +312,6 @@ static int32_t mndSetCreateMnodeRedoActions(SMnode *pMnode, STrans *pTrans, SDno
   createEpset.eps[0].port = pDnode->port;
   memcpy(createEpset.eps[0].fqdn, pDnode->fqdn, TSDB_FQDN_LEN);
 
-  {
-    int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &alterReq);
-    void   *pReq = taosMemoryMalloc(contLen);
-    tSerializeSDCreateMnodeReq(pReq, contLen, &alterReq);
-
-    STransAction action = {
-        .epSet = alterEpset,
-        .pCont = pReq,
-        .contLen = contLen,
-        .msgType = TDMT_DND_ALTER_MNODE,
-        .acceptableCode = 0,
-    };
-
-    if (mndTransAppendRedoAction(pTrans, &action) != 0) {
-      taosMemoryFree(pReq);
-      return -1;
-    }
-  }
-
   {
     int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &createReq);
     void   *pReq = taosMemoryMalloc(contLen);
@@ -350,6 +331,25 @@ static int32_t mndSetCreateMnodeRedoActions(SMnode *pMnode, STrans *pTrans, SDno
     }
   }
 
+  {
+    int32_t contLen = tSerializeSDCreateMnodeReq(NULL, 0, &alterReq);
+    void   *pReq = taosMemoryMalloc(contLen);
+    tSerializeSDCreateMnodeReq(pReq, contLen, &alterReq);
+
+    STransAction action = {
+        .epSet = alterEpset,
+        .pCont = pReq,
+        .contLen = contLen,
+        .msgType = TDMT_DND_ALTER_MNODE,
+        .acceptableCode = 0,
+    };
+
+    if (mndTransAppendRedoAction(pTrans, &action) != 0) {
+      taosMemoryFree(pReq);
+      return -1;
+    }
+  }
+
   return 0;
 }
 
@@ -365,6 +365,7 @@ static int32_t mndCreateMnode(SMnode *pMnode, SRpcMsg *pReq, SDnodeObj *pDnode,
   if (pTrans == NULL) goto _OVER;
 
   mDebug("trans:%d, used to create mnode:%d", pTrans->id, pCreate->dnodeId);
+  mndTransSetExecOneByOne(pTrans);
   if (mndSetCreateMnodeRedoLogs(pMnode, pTrans, &mnodeObj) != 0) goto _OVER;
   if (mndSetCreateMnodeCommitLogs(pMnode, pTrans, &mnodeObj) != 0) goto _OVER;
   if (mndSetCreateMnodeRedoActions(pMnode, pTrans, pDnode, &mnodeObj) != 0) goto _OVER;
@@ -536,7 +537,7 @@ static int32_t mndDropMnode(SMnode *pMnode, SRpcMsg *pReq, SMnodeObj *pObj) {
   if (pTrans == NULL) goto _OVER;
 
   mDebug("trans:%d, used to drop mnode:%d", pTrans->id, pObj->id);
-
+  mndTransSetExecOneByOne(pTrans);
   if (mndSetDropMnodeRedoLogs(pMnode, pTrans, pObj) != 0) goto _OVER;
   if (mndSetDropMnodeCommitLogs(pMnode, pTrans, pObj) != 0) goto _OVER;
   if (mndSetDropMnodeRedoActions(pMnode, pTrans, pObj->pDnode, pObj) != 0) goto _OVER;
diff --git a/source/dnode/mnode/impl/src/mndSma.c b/source/dnode/mnode/impl/src/mndSma.c
index cb7d3e81f6..7b5d1b6c32 100644
--- a/source/dnode/mnode/impl/src/mndSma.c
+++ b/source/dnode/mnode/impl/src/mndSma.c
@@ -507,6 +507,7 @@ static int32_t mndCreateSma(SMnode *pMnode, SRpcMsg *pReq, SMCreateSmaReq *pCrea
 
   mDebug("trans:%d, used to create sma:%s", pTrans->id, pCreate->name);
   mndTransSetDbInfo(pTrans, pDb);
+  mndTransSetExecOneByOne(pTrans);
 
   if (mndSetCreateSmaRedoLogs(pMnode, pTrans, &smaObj) != 0) goto _OVER;
   if (mndSetCreateSmaVgroupRedoLogs(pMnode, pTrans, &streamObj.fixedSinkVg) != 0) goto _OVER;
diff --git a/source/dnode/mnode/impl/src/mndTrans.c b/source/dnode/mnode/impl/src/mndTrans.c
index a7480f459a..16c56a63df 100644
--- a/source/dnode/mnode/impl/src/mndTrans.c
+++ b/source/dnode/mnode/impl/src/mndTrans.c
@@ -140,6 +140,7 @@ static SSdbRaw *mndTransActionEncode(STrans *pTrans) {
   SDB_SET_INT16(pRaw, dataPos, stage, _OVER)
   SDB_SET_INT16(pRaw, dataPos, pTrans->policy, _OVER)
   SDB_SET_INT16(pRaw, dataPos, pTrans->type, _OVER)
+  SDB_SET_INT16(pRaw, dataPos, pTrans->parallel, _OVER)
   SDB_SET_INT64(pRaw, dataPos, pTrans->createdTime, _OVER)
   SDB_SET_INT64(pRaw, dataPos, pTrans->dbUid, _OVER)
   SDB_SET_BINARY(pRaw, dataPos, pTrans->dbname, TSDB_DB_FNAME_LEN, _OVER)
@@ -245,12 +246,15 @@ static SSdbRow *mndTransActionDecode(SSdbRaw *pRaw) {
   int16_t stage = 0;
   int16_t policy = 0;
   int16_t type = 0;
+  int16_t parallel = 0;
   SDB_GET_INT16(pRaw, dataPos, &stage, _OVER)
   SDB_GET_INT16(pRaw, dataPos, &policy, _OVER)
   SDB_GET_INT16(pRaw, dataPos, &type, _OVER)
+  SDB_GET_INT16(pRaw, dataPos, &parallel, _OVER)
   pTrans->stage = stage;
   pTrans->policy = policy;
   pTrans->type = type;
+  pTrans->parallel = parallel;
   SDB_GET_INT64(pRaw, dataPos, &pTrans->createdTime, _OVER)
   SDB_GET_INT64(pRaw, dataPos, &pTrans->dbUid, _OVER)
   SDB_GET_BINARY(pRaw, dataPos, pTrans->dbname, TSDB_DB_FNAME_LEN, _OVER)
@@ -665,6 +669,8 @@ void mndTransSetDbInfo(STrans *pTrans, SDbObj *pDb) {
   memcpy(pTrans->dbname, pDb->name, TSDB_DB_FNAME_LEN);
 }
 
+void mndTransSetExecOneByOne(STrans *pTrans) { pTrans->parallel = TRN_EXEC_ONE_BY_ONE; }
+
 static int32_t mndTransSync(SMnode *pMnode, STrans *pTrans) {
   SSdbRaw *pRaw = mndTransActionEncode(pTrans);
   if (pRaw == NULL) {
@@ -970,7 +976,18 @@ static int32_t mndTransSendActionMsg(SMnode *pMnode, STrans *pTrans, SArray *pAr
   for (int32_t action = 0; action < numOfActions; ++action) {
     STransAction *pAction = taosArrayGet(pArray, action);
     if (pAction == NULL) continue;
-    if (pAction->msgSent) continue;
+
+    if (pAction->msgSent) {
+      if (pAction->msgReceived) {
+        continue;
+      } else {
+        if (pTrans->parallel == TRN_EXEC_ONE_BY_ONE) {
+          break;
+        } else {
+          continue;
+        }
+      }
+    }
 
     int64_t signature = pTrans->id;
     signature = (signature << 32);
@@ -990,6 +1007,9 @@ static int32_t mndTransSendActionMsg(SMnode *pMnode, STrans *pTrans, SArray *pAr
       pAction->msgSent = 1;
       pAction->msgReceived = 0;
       pAction->errCode = 0;
+      if (pTrans->parallel == TRN_EXEC_ONE_BY_ONE) {
+        break;
+      }
     } else {
       pAction->msgSent = 0;
       pAction->msgReceived = 0;
diff --git a/source/libs/sync/src/syncIndexMgr.c b/source/libs/sync/src/syncIndexMgr.c
index 5809cedb90..b44b0da750 100644
--- a/source/libs/sync/src/syncIndexMgr.c
+++ b/source/libs/sync/src/syncIndexMgr.c
@@ -60,7 +60,9 @@ void syncIndexMgrSetIndex(SSyncIndexMgr *pSyncIndexMgr, const SRaftId *pRaftId,
       return;
     }
   }
-  assert(0);
+
+  // maybe config change
+  // assert(0);
 }
 
 SyncIndex syncIndexMgrGetIndex(SSyncIndexMgr *pSyncIndexMgr, const SRaftId *pRaftId) {
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 99aac7991a..5ad8df11a9 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -981,6 +981,7 @@ char* syncNode2SimpleStr(const SSyncNode* pSyncNode) {
 }
 
 void syncNodeUpdateConfig(SSyncNode* pSyncNode, SSyncCfg* newConfig, bool* isDrop) {
+  SSyncCfg oldConfig = pSyncNode->pRaftCfg->cfg;
   pSyncNode->pRaftCfg->cfg = *newConfig;
   int32_t ret = 0;
 
@@ -1014,6 +1015,15 @@ void syncNodeUpdateConfig(SSyncNode* pSyncNode, SSyncCfg* newConfig, bool* isDro
 
   // isDrop
   *isDrop = true;
+  bool IamInOld, IamInNew;
+  for (int i = 0; i < oldConfig.replicaNum; ++i) {
+    if (strcmp((oldConfig.nodeInfo)[i].nodeFqdn, pSyncNode->myNodeInfo.nodeFqdn) == 0 &&
+        (oldConfig.nodeInfo)[i].nodePort == pSyncNode->myNodeInfo.nodePort) {
+      *isDrop = false;
+      break;
+    }
+  }
+
   for (int i = 0; i < newConfig->replicaNum; ++i) {
     if (strcmp((newConfig->nodeInfo)[i].nodeFqdn, pSyncNode->myNodeInfo.nodeFqdn) == 0 &&
         (newConfig->nodeInfo)[i].nodePort == pSyncNode->myNodeInfo.nodePort) {
diff --git a/tests/script/jenkins/basic.txt b/tests/script/jenkins/basic.txt
index 623182fddf..e85e9b8896 100644
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -55,7 +55,7 @@
 ./test.sh -f tsim/bnode/basic1.sim
 
 # ---- mnode
-#./test.sh -f tsim/mnode/basic1.sim
+./test.sh -f tsim/mnode/basic1.sim
 ./test.sh -f tsim/mnode/basic2.sim
 
 # ---- show
diff --git a/tests/script/tsim/mnode/basic1.sim b/tests/script/tsim/mnode/basic1.sim
index 198f36cdd2..9131237ca6 100644
--- a/tests/script/tsim/mnode/basic1.sim
+++ b/tests/script/tsim/mnode/basic1.sim
@@ -88,7 +88,7 @@ sql show mnodes
 print $data(1)[0] $data(1)[1] $data(1)[2] 
 print $data(2)[0] $data(2)[1] $data(2)[2] 
 
-if $rows != 2 then 
+if $rows != 1 then 
   return -1
 endi
 if $data(1)[0] != 1 then 
@@ -97,16 +97,16 @@ endi
 if $data(1)[2] != LEADER then 
   return -1
 endi
-if $data(2)[0] != NULL then 
+if $data(2)[0] != null then 
   goto step2
 endi
-if $data(2)[2] != NULL then 
+if $data(2)[2] != null then 
   goto step2
 endi
 
 sleep 2000
 
-print =============== create drop mnodes
+print =============== create mnodes
 sql create mnode on dnode 2
 sql show mnodes
 if $rows != 2 then