diff --git a/src/client/src/tscSecondaryMerge.c b/src/client/src/tscSecondaryMerge.c
index 52a06277e360a583f8e56f27fed38db741815db0..b62df7373275e936281c6cad548d1bd51d688ef1 100644
--- a/src/client/src/tscSecondaryMerge.c
+++ b/src/client/src/tscSecondaryMerge.c
@@ -353,7 +353,7 @@ void tscCreateLocalReducer(tExtMemBuffer **pMemBuffer, int32_t numOfBuffer, tOrd
   pRes->numOfGroups = 0;
 
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
-  STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);;
+  STableComInfo tinfo = tscGetTableInfo(pTableMetaInfo->pTableMeta);
   
   TSKEY stime = MIN(pQueryInfo->window.skey, pQueryInfo->window.ekey);
   int64_t revisedSTime =
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 5913200ff6d3f87e4a8edb1628806f4b04781e5f..bc3b12d0887b6a3b501ffc8832a34b68f0199a24 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1473,7 +1473,7 @@ int tscBuildTableMetaMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
     pMsg += len;
   }
 
-  pCmd->payloadLen = pMsg - (char*)pInfoMsg;;
+  pCmd->payloadLen = pMsg - (char*)pInfoMsg;
   pCmd->msgType = TSDB_MSG_TYPE_CM_TABLE_META;
 
   tfree(tmpData);
diff --git a/src/client/src/tscStream.c b/src/client/src/tscStream.c
index c4413f85414f67d8db3cb5422acc5e34e5eb87c3..7ce86dc1a41a8fab22fc47883a4fd03ced1d6678 100644
--- a/src/client/src/tscStream.c
+++ b/src/client/src/tscStream.c
@@ -499,7 +499,7 @@ TAOS_STREAM *taos_open_stream(TAOS *taos, const char *sqlstr, void (*fp)(void *p
   if (pSql->sqlstr == NULL) {
     tscError("%p failed to malloc sql string buffer", pSql);
     tscFreeSqlObj(pSql);
-    return NULL;;
+    return NULL;
   }
   strtolower(pSql->sqlstr, sqlstr);
 
diff --git a/src/mnode/inc/mnodeSdb.h b/src/mnode/inc/mnodeSdb.h
index df9dbf843ee7eb18e768880f539842e72e67ebf7..ca2fffe24c76b48dc647a08d08ffdce9e8873240 100644
--- a/src/mnode/inc/mnodeSdb.h
+++ b/src/mnode/inc/mnodeSdb.h
@@ -53,7 +53,7 @@ typedef struct {
   void *   rowData;
   int32_t  rowSize;
   int32_t  retCode; // for callback in sdb queue
-  void     (*cb)(struct SMnodeMsg *pMsg, int32_t code);
+  int32_t  (*cb)(struct SMnodeMsg *pMsg, int32_t code);
   struct SMnodeMsg *pMsg;
 } SSdbOper;
 
diff --git a/src/mnode/src/mnodeDb.c b/src/mnode/src/mnodeDb.c
index 7e0eb8ffc9bde8579eb9fc8d464ec5fc08c567b2..7e29ba5bcb546e83553fa0c042697ae8c46d772c 100644
--- a/src/mnode/src/mnodeDb.c
+++ b/src/mnode/src/mnodeDb.c
@@ -366,7 +366,7 @@ static int32_t mnodeCreateDb(SAcctObj *pAcct, SCMCreateDbMsg *pCreate, void *pMs
 
   code = sdbInsertRow(&oper);
   if (code != TSDB_CODE_SUCCESS) {
-    tfree(pDb);;
+    tfree(pDb);
   } else {
     mLPrint("db:%s, is created by %s", pDb->name, mnodeGetUserFromMsg(pMsg));
     if (pMsg != NULL) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
@@ -888,8 +888,8 @@ static SDbCfg mnodeGetAlterDbOption(SDbObj *pDb, SCMAlterDbMsg *pAlter) {
   return newCfg;
 }
 
-static void mnodeAlterDbCb(SMnodeMsg *pMsg, int32_t code) {
-  if (code != TSDB_CODE_SUCCESS) return;
+static int32_t mnodeAlterDbCb(SMnodeMsg *pMsg, int32_t code) {
+  if (code != TSDB_CODE_SUCCESS) return code;
   SDbObj *pDb = pMsg->pDb;
 
   void *pIter = NULL;
@@ -908,6 +908,8 @@ static void mnodeAlterDbCb(SMnodeMsg *pMsg, int32_t code) {
   mLPrint("db:%s, is alterd by %s", pDb->name, mnodeGetUserFromMsg(pMsg));
 
   balanceNotify();
+
+  return TSDB_CODE_SUCCESS;
 }
 
 static int32_t mnodeAlterDb(SDbObj *pDb, SCMAlterDbMsg *pAlter, void *pMsg) {
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index 380a992473c1c658a5860c2aa22b673c5b0c483b..aff13f46bc8ca047ed33b209eb1dd2289b1dca10 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -962,9 +962,7 @@ static void *sdbWorkerFp(void *param) {
       }
 
       int32_t code = sdbWrite(pOper, pHead, type);
-      if (pOper && code != TSDB_CODE_SUCCESS) {
-        pOper->retCode = code;
-      }
+      if (pOper) pOper->retCode = code;
     }
 
     walFsync(tsSdbObj.wal);
@@ -976,7 +974,7 @@ static void *sdbWorkerFp(void *param) {
       if (type == TAOS_QTYPE_RPC) {
         pOper = (SSdbOper *)item;
         if (pOper->cb) {
-          (*pOper->cb)(pOper->pMsg, pOper->retCode);
+          pOper->retCode = (*pOper->cb)(pOper->pMsg, pOper->retCode);
         }
         dnodeSendRpcMnodeWriteRsp(pOper->pMsg, pOper->retCode);
       }
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 0e255d011b621cd4785c463bac5eea5ef67794af..79079f99e50e166cc6eba5bb4c6ea62bee59f594 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -797,18 +797,20 @@ static int32_t mnodeProcessCreateSuperTableMsg(SMnodeMsg *pMsg) {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
     .pObj = pStable,
-    .rowSize = sizeof(SSuperTableObj) + schemaSize
+    .rowSize = sizeof(SSuperTableObj) + schemaSize,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbInsertRow(&oper);
   if (code != TSDB_CODE_SUCCESS) {
     mnodeDestroySuperTable(pStable);
     mError("table:%s, failed to create, sdb error", pCreate->tableId);
-    return TSDB_CODE_MND_SDB_ERROR;
   } else {
     mLPrint("table:%s, is created, tags:%d fields:%d", pStable->info.tableId, pStable->numOfTags, pStable->numOfColumns);
-    return TSDB_CODE_SUCCESS;
+    if (pMsg != NULL) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
+
+  return code;
 }
 
 static int32_t mnodeProcessDropSuperTableMsg(SMnodeMsg *pMsg) {
@@ -840,11 +842,16 @@ static int32_t mnodeProcessDropSuperTableMsg(SMnodeMsg *pMsg) {
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
-    .pObj = pStable
+    .pObj = pStable,
+    .pMsg = pMsg
   };
   
   int32_t code = sdbDeleteRow(&oper);
-  mLPrint("stable:%s, is dropped from sdb, result:%s", pStable->info.tableId, tstrerror(code));
+  if (code == TSDB_CODE_MND_ACTION_IN_PROGRESS) {
+    mLPrint("stable:%s, is dropped from sdb, result:%s", pStable->info.tableId, tstrerror(code));
+    if (pMsg != NULL) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
+  }
+
   return code;
 }
 
@@ -859,7 +866,7 @@ static int32_t mnodeFindSuperTableTagIndex(SSuperTableObj *pStable, const char *
   return -1;
 }
 
-static int32_t mnodeAddSuperTableTag(SSuperTableObj *pStable, SSchema schema[], int32_t ntags) {
+static int32_t mnodeAddSuperTableTag(SMnodeMsg *pMsg, SSuperTableObj *pStable, SSchema schema[], int32_t ntags) {
   if (pStable->numOfTags + ntags > TSDB_MAX_TAGS) {
     mError("stable:%s, add tag, too many tags", pStable->info.tableId);
     return TSDB_CODE_MND_TOO_MANY_TAGS;
@@ -893,19 +900,20 @@ static int32_t mnodeAddSuperTableTag(SSuperTableObj *pStable, SSchema schema[],
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
-    .pObj = pStable
+    .pObj = pStable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
-  if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+  if (code == TSDB_CODE_SUCCESS) {
+    mPrint("stable %s, succeed to add tag %s", pStable->info.tableId, schema[0].name);
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
-
-  mPrint("stable %s, succeed to add tag %s", pStable->info.tableId, schema[0].name);
-  return TSDB_CODE_SUCCESS;
+  
+  return code;
 }
 
-static int32_t mnodeDropSuperTableTag(SSuperTableObj *pStable, char *tagName) {
+static int32_t mnodeDropSuperTableTag(SMnodeMsg *pMsg, SSuperTableObj *pStable, char *tagName) {
   int32_t col = mnodeFindSuperTableTagIndex(pStable, tagName);
   if (col < 0) {
     mError("stable:%s, drop tag, tag:%s not exist", pStable->info.tableId, tagName);
@@ -920,19 +928,20 @@ static int32_t mnodeDropSuperTableTag(SSuperTableObj *pStable, char *tagName) {
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
-    .pObj = pStable
+    .pObj = pStable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
-  if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+  if (code == TSDB_CODE_SUCCESS) {
+    mPrint("stable %s, succeed to drop tag %s", pStable->info.tableId, tagName);
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
-  
-  mPrint("stable %s, succeed to drop tag %s", pStable->info.tableId, tagName);
-  return TSDB_CODE_SUCCESS;
+
+  return code;
 }
 
-static int32_t mnodeModifySuperTableTagName(SSuperTableObj *pStable, char *oldTagName, char *newTagName) {
+static int32_t mnodeModifySuperTableTagName(SMnodeMsg *pMsg, SSuperTableObj *pStable, char *oldTagName, char *newTagName) {
   int32_t col = mnodeFindSuperTableTagIndex(pStable, oldTagName);
   if (col < 0) {
     mError("stable:%s, failed to modify table tag, oldName: %s, newName: %s", pStable->info.tableId, oldTagName, newTagName);
@@ -956,16 +965,17 @@ static int32_t mnodeModifySuperTableTagName(SSuperTableObj *pStable, char *oldTa
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
-    .pObj = pStable
+    .pObj = pStable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
-  if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+  if (code == TSDB_CODE_SUCCESS) {
+    mPrint("stable %s, succeed to modify tag %s to %s", pStable->info.tableId, oldTagName, newTagName);
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
-  
-  mPrint("stable %s, succeed to modify tag %s to %s", pStable->info.tableId, oldTagName, newTagName);
-  return TSDB_CODE_SUCCESS;
+
+  return code;
 }
 
 static int32_t mnodeFindSuperTableColumnIndex(SSuperTableObj *pStable, char *colName) {
@@ -979,7 +989,8 @@ static int32_t mnodeFindSuperTableColumnIndex(SSuperTableObj *pStable, char *col
   return -1;
 }
 
-static int32_t mnodeAddSuperTableColumn(SDbObj *pDb, SSuperTableObj *pStable, SSchema schema[], int32_t ncols) {
+static int32_t mnodeAddSuperTableColumn(SMnodeMsg *pMsg, SSuperTableObj *pStable, SSchema schema[], int32_t ncols) {
+  SDbObj *pDb = pMsg->pDb;
   if (ncols <= 0) {
     mError("stable:%s, add column, ncols:%d <= 0", pStable->info.tableId);
     return TSDB_CODE_MND_APP_ERROR;
@@ -1021,19 +1032,21 @@ static int32_t mnodeAddSuperTableColumn(SDbObj *pDb, SSuperTableObj *pStable, SS
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
-    .pObj = pStable
+    .pObj = pStable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
-  if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+  if (code == TSDB_CODE_SUCCESS) {
+    mPrint("stable %s, succeed to add column", pStable->info.tableId);
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
-  
-  mPrint("stable %s, succeed to add column", pStable->info.tableId);
-  return TSDB_CODE_SUCCESS;
+
+  return code;
 }
 
-static int32_t mnodeDropSuperTableColumn(SDbObj *pDb, SSuperTableObj *pStable, char *colName) {
+static int32_t mnodeDropSuperTableColumn(SMnodeMsg *pMsg, SSuperTableObj *pStable, char *colName) {
+  SDbObj *pDb = pMsg->pDb;
   int32_t col = mnodeFindSuperTableColumnIndex(pStable, colName);
   if (col <= 0) {
     mError("stable:%s, drop column, column:%s not exist", pStable->info.tableId, colName);
@@ -1058,16 +1071,17 @@ static int32_t mnodeDropSuperTableColumn(SDbObj *pDb, SSuperTableObj *pStable, c
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsSuperTableSdb,
-    .pObj = pStable
+    .pObj = pStable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
-  if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+  if (code == TSDB_CODE_SUCCESS) {
+    mPrint("stable %s, succeed to delete column", pStable->info.tableId);
+    code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
   
-  mPrint("stable %s, succeed to delete column", pStable->info.tableId);
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 // show super tables
@@ -1428,7 +1442,30 @@ static void *mnodeBuildCreateChildTableMsg(SCMCreateTableMsg *pMsg, SChildTableO
   return pCreate;
 }
 
-static SChildTableObj* mnodeDoCreateChildTable(SCMCreateTableMsg *pCreate, SVgObj *pVgroup, int32_t tid) {
+static int32_t mnodeDoCreateChildTableCb(SMnodeMsg *pMsg, int32_t code) {
+  if (code != TSDB_CODE_SUCCESS) return code;
+  
+  SCMCreateTableMsg *pCreate = pMsg->rpcMsg.pCont;
+  SMDCreateTableMsg *pMDCreate = mnodeBuildCreateChildTableMsg(pCreate, (SChildTableObj *)pMsg->pTable);
+  if (pMDCreate == NULL) {
+    return terrno;
+  }
+
+  SRpcIpSet ipSet = mnodeGetIpSetFromVgroup(pMsg->pVgroup);
+  SRpcMsg rpcMsg = {
+      .handle  = pMsg,
+      .pCont   = pMDCreate,
+      .contLen = htonl(pMDCreate->contLen),
+      .code    = 0,
+      .msgType = TSDB_MSG_TYPE_MD_CREATE_TABLE
+  };
+
+  dnodeSendMsgToDnode(&ipSet, &rpcMsg);
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static SChildTableObj* mnodeDoCreateChildTable(SMnodeMsg *pMsg, SVgObj *pVgroup, int32_t tid) {
+  SCMCreateTableMsg *pCreate = pMsg->rpcMsg.pCont;
   SChildTableObj *pTable = calloc(1, sizeof(SChildTableObj));
   if (pTable == NULL) {
     mError("table:%s, failed to alloc memory", pCreate->tableId);
@@ -1503,16 +1540,20 @@ static SChildTableObj* mnodeDoCreateChildTable(SCMCreateTableMsg *pCreate, SVgOb
   desc.type = SDB_OPER_GLOBAL;
   desc.pObj = pTable;
   desc.table = tsChildTableSdb;
+  desc.pMsg = pMsg;
+  desc.cb = mnodeDoCreateChildTableCb;
   
-  if (sdbInsertRow(&desc) != TSDB_CODE_SUCCESS) {
+  int32_t code = sdbInsertRow(&desc);
+  if (code != TSDB_CODE_SUCCESS) {
     free(pTable);
     mError("table:%s, update sdb error", pCreate->tableId);
     terrno = TSDB_CODE_MND_SDB_ERROR;
     return NULL;
+  } else {
+    mTrace("table:%s, create table in vgroup:%d, id:%d, uid:%" PRIu64, pTable->info.tableId, pVgroup->vgId, pTable->sid,
+           pTable->uid);
+    return pTable;
   }
-
-  mTrace("table:%s, create table in vgroup:%d, id:%d, uid:%" PRIu64 , pTable->info.tableId, pVgroup->vgId, pTable->sid, pTable->uid);
-  return pTable;
 }
 
 static int32_t mnodeProcessCreateChildTableMsg(SMnodeMsg *pMsg) {
@@ -1537,7 +1578,7 @@ static int32_t mnodeProcessCreateChildTableMsg(SMnodeMsg *pMsg) {
         return mnodeCreateVgroup(pMsg, pMsg->pDb);
       }
 
-      pMsg->pTable = (STableObj *)mnodeDoCreateChildTable(pCreate, pVgroup, sid);
+      pMsg->pTable = (STableObj *)mnodeDoCreateChildTable(pMsg, pVgroup, sid);
       if (pMsg->pTable == NULL) {
         return terrno;
       }
@@ -1550,25 +1591,9 @@ static int32_t mnodeProcessCreateChildTableMsg(SMnodeMsg *pMsg) {
 
   if (pMsg->pTable == NULL) {
     return terrno;
+  } else {
+    return TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
-
-  SMDCreateTableMsg *pMDCreate = mnodeBuildCreateChildTableMsg(pCreate, (SChildTableObj *)pMsg->pTable);
-  if (pMDCreate == NULL) {
-    return terrno;
-  }
-
-  SRpcIpSet ipSet = mnodeGetIpSetFromVgroup(pVgroup);
-  SRpcMsg rpcMsg = {
-      .handle  = pMsg,
-      .pCont   = pMDCreate,
-      .contLen = htonl(pMDCreate->contLen),
-      .code    = 0,
-      .msgType = TSDB_MSG_TYPE_MD_CREATE_TABLE
-  };
-
-  dnodeSendMsgToDnode(&ipSet, &rpcMsg);
-
-  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
 }
 
 static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg) {
@@ -1622,7 +1647,8 @@ static int32_t mnodeFindNormalTableColumnIndex(SChildTableObj *pTable, char *col
   return -1;
 }
 
-static int32_t mnodeAddNormalTableColumn(SDbObj *pDb, SChildTableObj *pTable, SSchema schema[], int32_t ncols) {
+static int32_t mnodeAddNormalTableColumn(SMnodeMsg *pMsg, SChildTableObj *pTable, SSchema schema[], int32_t ncols) {
+  SDbObj *pDb = pMsg->pDb;
   if (ncols <= 0) {
     mError("table:%s, add column, ncols:%d <= 0", pTable->info.tableId);
     return TSDB_CODE_MND_APP_ERROR;
@@ -1657,19 +1683,21 @@ static int32_t mnodeAddNormalTableColumn(SDbObj *pDb, SChildTableObj *pTable, SS
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsChildTableSdb,
-    .pObj = pTable
+    .pObj = pTable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
-  if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+  if (code == TSDB_CODE_SUCCESS) {
+    mPrint("table %s, succeed to add column", pTable->info.tableId);
+    return TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
   
-  mPrint("table %s, succeed to add column", pTable->info.tableId);
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
-static int32_t mnodeDropNormalTableColumn(SDbObj *pDb, SChildTableObj *pTable, char *colName) {
+static int32_t mnodeDropNormalTableColumn(SMnodeMsg *pMsg, SChildTableObj *pTable, char *colName) {
+  SDbObj *pDb = pMsg->pDb;
   int32_t col = mnodeFindNormalTableColumnIndex(pTable, colName);
   if (col <= 0) {
     mError("table:%s, drop column, column:%s not exist", pTable->info.tableId, colName);
@@ -1689,16 +1717,17 @@ static int32_t mnodeDropNormalTableColumn(SDbObj *pDb, SChildTableObj *pTable, c
   SSdbOper oper = {
     .type = SDB_OPER_GLOBAL,
     .table = tsChildTableSdb,
-    .pObj = pTable
+    .pObj = pTable,
+    .pMsg = pMsg
   };
 
   int32_t code = sdbUpdateRow(&oper);
   if (code != TSDB_CODE_SUCCESS) {
-    return TSDB_CODE_MND_SDB_ERROR;
+    mPrint("table %s, succeed to drop column %s", pTable->info.tableId, colName);
+    return TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
   
-  mPrint("table %s, succeed to drop column %s", pTable->info.tableId, colName);
-  return TSDB_CODE_SUCCESS;
+  return code;
 }
 
 static int32_t mnodeSetSchemaFromNormalTable(SSchema *pSchema, SChildTableObj *pTable) {
@@ -2237,32 +2266,32 @@ static int32_t mnodeProcessAlterTableMsg(SMnodeMsg *pMsg) {
     SSuperTableObj *pTable = (SSuperTableObj *)pMsg->pTable;
     mTrace("table:%s, start to alter stable", pAlter->tableId);
     if (pAlter->type == TSDB_ALTER_TABLE_ADD_TAG_COLUMN) {
-      code = mnodeAddSuperTableTag(pTable, pAlter->schema, 1);
+      code = mnodeAddSuperTableTag(pMsg, pTable, pAlter->schema, 1);
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_TAG_COLUMN) {
-      code = mnodeDropSuperTableTag(pTable, pAlter->schema[0].name);
+      code = mnodeDropSuperTableTag(pMsg, pTable, pAlter->schema[0].name);
     } else if (pAlter->type == TSDB_ALTER_TABLE_CHANGE_TAG_COLUMN) {
-      code = mnodeModifySuperTableTagName(pTable, pAlter->schema[0].name, pAlter->schema[1].name);
+      code = mnodeModifySuperTableTagName(pMsg, pTable, pAlter->schema[0].name, pAlter->schema[1].name);
     } else if (pAlter->type == TSDB_ALTER_TABLE_ADD_COLUMN) {
-      code = mnodeAddSuperTableColumn(pMsg->pDb, pTable, pAlter->schema, 1);
+      code = mnodeAddSuperTableColumn(pMsg, pTable, pAlter->schema, 1);
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_COLUMN) {
-      code = mnodeDropSuperTableColumn(pMsg->pDb, pTable, pAlter->schema[0].name);
+      code = mnodeDropSuperTableColumn(pMsg, pTable, pAlter->schema[0].name);
     } else {
     }
   } else {
     mTrace("table:%s, start to alter ctable", pAlter->tableId);
     SChildTableObj *pTable = (SChildTableObj *)pMsg->pTable;
     if (pAlter->type == TSDB_ALTER_TABLE_UPDATE_TAG_VAL) {
-      char *tagVal = (char*)(pAlter->schema + pAlter->numOfCols);
+      char *tagVal = (char *)(pAlter->schema + pAlter->numOfCols);
       code = mnodeModifyChildTableTagValue(pTable, pAlter->schema[0].name, tagVal);
     } else if (pAlter->type == TSDB_ALTER_TABLE_ADD_COLUMN) {
-      code = mnodeAddNormalTableColumn(pMsg->pDb, pTable, pAlter->schema, 1);
+      code = mnodeAddNormalTableColumn(pMsg, pTable, pAlter->schema, 1);
     } else if (pAlter->type == TSDB_ALTER_TABLE_DROP_COLUMN) {
-      code = mnodeDropNormalTableColumn(pMsg->pDb, pTable, pAlter->schema[0].name);
+      code = mnodeDropNormalTableColumn(pMsg, pTable, pAlter->schema[0].name);
     } else {
     }
   }
 
-  return code;
+ return code;
 }
 
 static int32_t mnodeGetStreamTableMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index 25b9daf00c446799f322cac399925b7a4861a8eb..cdb494e2982c7e65b16caa4c6a8267b97efca4a1 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -299,6 +299,27 @@ void *mnodeGetNextVgroup(void *pIter, SVgObj **pVgroup) {
   return sdbFetchRow(tsVgroupSdb, pIter, (void **)pVgroup); 
 }
 
+static int32_t mnodeCreateVgroupCb(SMnodeMsg *pMsg, int32_t code) {
+  if (code != TSDB_CODE_SUCCESS) {
+    pMsg->pVgroup = NULL;
+    return code;
+  }
+
+  SVgObj *pVgroup = pMsg->pVgroup;
+  SDbObj *pDb = pMsg->pDb;
+
+  mPrint("vgId:%d, is created in mnode, db:%s replica:%d", pVgroup->vgId, pDb->name, pVgroup->numOfVnodes);
+  for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
+    mPrint("vgId:%d, index:%d, dnode:%d", pVgroup->vgId, i, pVgroup->vnodeGid[i].dnodeId);
+  }
+
+  mnodeIncVgroupRef(pVgroup);
+  pMsg->expected = pVgroup->numOfVnodes;
+  mnodeSendCreateVgroupMsg(pVgroup, pMsg);
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
 int32_t mnodeCreateVgroup(SMnodeMsg *pMsg, SDbObj *pDb) {
   SVgObj *pVgroup = (SVgObj *)calloc(1, sizeof(SVgObj));
   strcpy(pVgroup->dbName, pDb->name);
@@ -314,26 +335,22 @@ int32_t mnodeCreateVgroup(SMnodeMsg *pMsg, SDbObj *pDb) {
     .type = SDB_OPER_GLOBAL,
     .table = tsVgroupSdb,
     .pObj = pVgroup,
-    .rowSize = sizeof(SVgObj)
+    .rowSize = sizeof(SVgObj),
+    .pMsg = pMsg,
+    .cb = mnodeCreateVgroupCb
   };
 
+  pMsg->pVgroup = pVgroup;
+
   int32_t code = sdbInsertRow(&oper);
   if (code != TSDB_CODE_SUCCESS) {
+    pMsg->pVgroup = NULL;
     tfree(pVgroup);
-    return TSDB_CODE_MND_SDB_ERROR;
-  }
-
-  mPrint("vgId:%d, is created in mnode, db:%s replica:%d", pVgroup->vgId, pDb->name, pVgroup->numOfVnodes);
-  for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
-    mPrint("vgId:%d, index:%d, dnode:%d", pVgroup->vgId, i, pVgroup->vnodeGid[i].dnodeId);
+  } else {
+    if (pMsg != NULL) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
   }
 
-  mnodeIncVgroupRef(pVgroup);
-  pMsg->pVgroup = pVgroup;
-  pMsg->expected = pVgroup->numOfVnodes;
-  mnodeSendCreateVgroupMsg(pVgroup, pMsg);
-
-  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+  return code;
 }
 
 void mnodeDropVgroup(SVgObj *pVgroup, void *ahandle) {
diff --git a/src/rpc/src/rpcTcp.c b/src/rpc/src/rpcTcp.c
index 7035b30b66ec1d0b0d1a1e50cfb1d74f83ff904f..0ca73c1b40d9f7c12b95a434555a0127a0f574e1 100644
--- a/src/rpc/src/rpcTcp.c
+++ b/src/rpc/src/rpcTcp.c
@@ -117,7 +117,7 @@ void *taosInitTcpServer(uint32_t ip, uint16_t port, char *label, int numOfThread
     code = pthread_mutex_init(&(pThreadObj->mutex), NULL);
     if (code < 0) {
       tError("%s failed to init TCP process data mutex(%s)", label, strerror(errno));
-      break;;
+      break;
     }
 
     pThreadObj->pollFd = epoll_create(10);  // size does not matter
@@ -367,7 +367,7 @@ static void taosReportBrokenLink(SFdObj *pFdObj) {
     recvInfo.ip = 0;
     recvInfo.port = 0;
     recvInfo.shandle = pThreadObj->shandle;
-    recvInfo.thandle = pFdObj->thandle;;
+    recvInfo.thandle = pFdObj->thandle;
     recvInfo.chandle = NULL;
     recvInfo.connType = RPC_CONN_TCP;
     (*(pThreadObj->processData))(&recvInfo);
@@ -414,7 +414,7 @@ static int taosReadTcpData(SFdObj *pFdObj, SRecvInfo *pInfo) {
   pInfo->ip = pFdObj->ip;
   pInfo->port = pFdObj->port;
   pInfo->shandle = pThreadObj->shandle;
-  pInfo->thandle = pFdObj->thandle;;
+  pInfo->thandle = pFdObj->thandle;
   pInfo->chandle = pFdObj;
   pInfo->connType = RPC_CONN_TCP;
 
diff --git a/src/util/src/tmem.c b/src/util/src/tmem.c
index 38d930ac4e89456aa706c87880ceb52107bb8849..ec5f90990b4d84a92f898656f835c71a976676fc 100644
--- a/src/util/src/tmem.c
+++ b/src/util/src/tmem.c
@@ -29,7 +29,7 @@ static FILE* fpAllocLog = NULL;
 // memory allocator which fails randomly
 
 extern int32_t taosGetTimestampSec();
-static int32_t startTime = INT32_MAX;;
+static int32_t startTime = INT32_MAX;
 
 static bool random_alloc_fail(size_t size, const char* file, uint32_t line) {
   if (taosGetTimestampSec() < startTime) {
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 67ba891f93237399b11ce53b8e9ea6ae06cfa582..6c7e475b641e572226c0877b2213b79f8618813e 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -119,7 +119,7 @@ int32_t vnodeCreate(SMDCreateVnodeMsg *pVnodeCfg) {
   tsdbCfg.minRowsPerFileBlock = pVnodeCfg->cfg.minRowsPerFileBlock;
   tsdbCfg.maxRowsPerFileBlock = pVnodeCfg->cfg.maxRowsPerFileBlock;
   tsdbCfg.precision           = pVnodeCfg->cfg.precision;
-  tsdbCfg.compression         = pVnodeCfg->cfg.compression;;
+  tsdbCfg.compression         = pVnodeCfg->cfg.compression;
 
   char tsdbDir[TSDB_FILENAME_LEN] = {0};
   sprintf(tsdbDir, "%s/vnode%d/tsdb", tsVnodeDir, pVnodeCfg->cfg.vgId);