diff --git a/src/mnode/src/mnodeDb.c b/src/mnode/src/mnodeDb.c
index c7e3085e69285570e7b6700507c4b41a62c926e4..48acc6787c0d601a1efceb182ea0da48da407a13 100644
--- a/src/mnode/src/mnodeDb.c
+++ b/src/mnode/src/mnodeDb.c
@@ -458,6 +458,7 @@ void mnodeRemoveVgroupFromDb(SVgObj *pVgroup) {
         pDb->vgList[v2] = pDb->vgList[v2 + 1];
       }
       pDb->numOfVgroups--;
+      pDb->vgList[pDb->numOfVgroups] = NULL;
       break;
     }
   }
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index a4c2c60aa34f513550e64c2a6c83d4589dbc512a..301dd41cbc5e08917b5adf27643822da574a5abe 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -487,7 +487,13 @@ static int32_t sdbInsertHash(SSdbTable *pTable, SSdbOper *pOper) {
   sdbDebug("table:%s, insert record:%s to hash, rowSize:%d numOfRows:%" PRId64 ", msg:%p", pTable->tableName,
            sdbGetKeyStrFromObj(pTable, pOper->pObj), pOper->rowSize, pTable->numOfRows, pOper->pMsg);
 
-  (*pTable->insertFp)(pOper);
+  int32_t code = (*pTable->insertFp)(pOper);
+  if (code != TSDB_CODE_SUCCESS) {
+    sdbError("table:%s, failed to insert record:%s to hash, remove it", pTable->tableName,
+             sdbGetKeyStrFromObj(pTable, pOper->pObj));
+    sdbDeleteHash(pTable, pOper);
+  }
+
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index 1d14ec030714f5f2c6ab9703fbdc67cc654155e8..5837aed25908751e7925276ed87ba6af9291af29 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -2351,14 +2351,16 @@ static void mnodeProcessCreateChildTableRsp(SRpcMsg *rpcMsg) {
 
     // if the vgroup is already dropped from hash, it can't be accquired by pTable->vgId
     // so the refCount of vgroup can not be decreased
-    SVgObj *pVgroup = mnodeGetVgroup(pTable->vgId);
-    if (pVgroup == NULL) {
-      mnodeRemoveTableFromVgroup(pVgroup, pTable);
-    }
-    mnodeDecVgroupRef(pVgroup);
+    // SVgObj *pVgroup = mnodeGetVgroup(pTable->vgId);
+    // if (pVgroup == NULL) {
+    //   mnodeRemoveTableFromVgroup(mnodeMsg->pVgroup, pTable);
+    // }
+    // mnodeDecVgroupRef(pVgroup);
 
     mnodeSendDropChildTableMsg(mnodeMsg, false);
     rpcMsg->code = TSDB_CODE_SUCCESS;
+    dnodeSendRpcMnodeWriteRsp(mnodeMsg, rpcMsg->code);
+    return;
   }
 
   if (rpcMsg->code == TSDB_CODE_SUCCESS || rpcMsg->code == TSDB_CODE_TDB_TABLE_ALREADY_EXIST) {
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index e46da1d8920c12a2a6b8ead97fa625df43180efe..942372024124791c1cd9a8242ce381cc03dedd09 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -83,11 +83,12 @@ static int32_t mnodeVgroupActionInsert(SSdbOper *pOper) {
   // refer to db
   SDbObj *pDb = mnodeGetDb(pVgroup->dbName);
   if (pDb == NULL) {
+    mError("vgId:%d, db:%s is not exist while insert into hash", pVgroup->vgId, pVgroup->dbName);
     return TSDB_CODE_MND_INVALID_DB;
   }
   
   if (pDb->status != TSDB_DB_STATUS_READY) {
-    mError("db:%s, status:%d, in dropping", pDb->name, pDb->status);
+    mError("vgId:%d, db:%s status:%d, in dropping", pVgroup->vgId, pDb->name, pDb->status);
     return TSDB_CODE_MND_DB_IN_DROPPING;
   }
 
@@ -116,10 +117,12 @@ static int32_t mnodeVgroupActionInsert(SSdbOper *pOper) {
 static int32_t mnodeVgroupActionDelete(SSdbOper *pOper) {
   SVgObj *pVgroup = pOper->pObj;
 
-  if (pVgroup->pDb != NULL) {
-    mnodeRemoveVgroupFromDb(pVgroup);
+  if (pVgroup->pDb == NULL) {
+    mError("vgId:%d, db:%s is not exist while insert into hash", pVgroup->vgId, pVgroup->dbName);
+    return TSDB_CODE_MND_VGROUP_NOT_EXIST;
   }
 
+  mnodeRemoveVgroupFromDb(pVgroup);
   mnodeDecDbRef(pVgroup->pDb);
 
   for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
@@ -446,6 +449,12 @@ int32_t mnodeGetAvailableVgroup(SMnodeMsg *pMsg, SVgObj **ppVgroup, int32_t *pSi
     }
   }
 
+  if (pDb->numOfVgroups < 1) {
+    mDebug("app:%p:%p, db:%s, failed create new vgroup since:%s, numOfVgroups:%d maxVgroupsPerDb:%d ",
+           pMsg->rpcMsg.ahandle, pMsg, pDb->name, tstrerror(code), pDb->numOfVgroups, maxVgroupsPerDb);
+    return code;
+  }
+
   SVgObj *pVgroup = pDb->vgList[0];
   if (pVgroup == NULL) {
     pthread_mutex_unlock(&pDb->mutex);
@@ -517,6 +526,19 @@ static int32_t mnodeCreateVgroupCb(SMnodeMsg *pMsg, int32_t code) {
 
     dnodeReprocessMnodeWriteMsg(pMsg);
     return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+    // if (pVgroup->status == TAOS_VG_STATUS_CREATING || pVgroup->status == TAOS_VG_STATUS_READY) {
+    //   mInfo("app:%p:%p, vgId:%d, is created in sdb, db:%s replica:%d", pMsg->rpcMsg.ahandle, pMsg, pVgroup->vgId,
+    //         pDb->name, pVgroup->numOfVnodes);
+    //   pVgroup->status = TAOS_VG_STATUS_READY;
+    //   SSdbOper desc = {.type = SDB_OPER_GLOBAL, .pObj = pVgroup, .table = tsVgroupSdb};
+    //   (void)sdbUpdateRow(&desc);
+    //   dnodeReprocessMnodeWriteMsg(pMsg);
+    //   return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+    // } else {
+    //   mError("app:%p:%p, vgId:%d, is created in sdb, db:%s replica:%d, but vgroup is dropping", pMsg->rpcMsg.ahandle,
+    //          pMsg, pVgroup->vgId, pDb->name, pVgroup->numOfVnodes);
+    //   return TSDB_CODE_MND_VGROUP_NOT_EXIST;
+    // }
   }
 }
 
@@ -955,7 +977,7 @@ void mnodeSendDropVnodeMsg(int32_t vgId, SRpcEpSet *epSet, void *ahandle) {
 
 static void mnodeSendDropVgroupMsg(SVgObj *pVgroup, void *ahandle) {
   pVgroup->status = TAOS_VG_STATUS_DROPPING; // deleting
-  mDebug("vgId:%d, send drop all vnodes msg, ahandle:%p", pVgroup->vgId, ahandle);
+  mDebug("vgId:%d, send drop all vnodes msg, ahandle:%p db:%s", pVgroup->vgId, ahandle, pVgroup->dbName);
   for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
     SRpcEpSet epSet = mnodeGetEpSetFromIp(pVgroup->vnodeGid[i].pDnode->dnodeEp);
     mDebug("vgId:%d, send drop vnode msg to dnode:%d, ahandle:%p", pVgroup->vgId, pVgroup->vnodeGid[i].dnodeId, ahandle);
@@ -1117,6 +1139,7 @@ void mnodeSendDropAllDbVgroupsMsg(SDbObj *pDropDb) {
     }
 
     mnodeDecVgroupRef(pVgroup);
+    numOfVgroups++;
   }
 
   sdbFreeIter(pIter);
diff --git a/src/util/src/tqueue.c b/src/util/src/tqueue.c
index 8c6d6243eb4f677e9a5436b4449e07df011d2b52..e2f061445571a41ad2e9ce9aa60070cf9a41fcee 100644
--- a/src/util/src/tqueue.c
+++ b/src/util/src/tqueue.c
@@ -241,6 +241,7 @@ void taosCloseQset(taos_qset param) {
   if (param == NULL) return;
   STaosQset *qset = (STaosQset *)param;
 
+#if 0
   // remove all the queues from qset
   pthread_mutex_lock(&qset->mutex);
   while (qset->head) {
@@ -251,6 +252,7 @@ void taosCloseQset(taos_qset param) {
     queue->next = NULL;
   }
   pthread_mutex_unlock(&qset->mutex);
+#endif  
 
   pthread_mutex_destroy(&qset->mutex);
   tsem_destroy(&qset->sem);