diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
index 8008e5f810..0524e2713a 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
@@ -124,7 +124,7 @@ void vmCloseVnode(SVnodeMgmt *pMgmt, SVnodeObj *pVnode, bool commitAndRemoveWal)
   vmFreeQueue(pMgmt, pVnode);
 
   if (commitAndRemoveWal) {
-    dInfo("vgId:%d, commit data", pVnode->vgId);
+    dInfo("vgId:%d, commit data for vnode split", pVnode->vgId);
     vnodeSyncCommit(pVnode->pImpl);
     vnodeBegin(pVnode->pImpl);
     dInfo("vgId:%d, commit data finished", pVnode->vgId);
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 7cdac9385a..45113d55d3 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -1664,7 +1664,7 @@ _err:
 }
 static int32_t vnodeProcessDropIndexReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp) {
   SDropIndexReq req = {0};
-  pRsp->msgType = TDMT_VND_CREATE_INDEX_RSP;
+  pRsp->msgType = TDMT_VND_DROP_INDEX_RSP;
   pRsp->code = TSDB_CODE_SUCCESS;
   pRsp->pCont = NULL;
   pRsp->contLen = 0;
@@ -1673,6 +1673,7 @@ static int32_t vnodeProcessDropIndexReq(SVnode *pVnode, int64_t version, void *p
     terrno = TSDB_CODE_INVALID_MSG;
     return -1;
   }
+
   if (metaDropIndexFromSTable(pVnode->pMeta, version, &req) < 0) {
     pRsp->code = terrno;
     return -1;
diff --git a/source/libs/nodes/src/nodesUtilFuncs.c b/source/libs/nodes/src/nodesUtilFuncs.c
index 22afc7ef55..8d6c3288b9 100644
--- a/source/libs/nodes/src/nodesUtilFuncs.c
+++ b/source/libs/nodes/src/nodesUtilFuncs.c
@@ -1462,7 +1462,7 @@ SListCell* nodesListErase(SNodeList* pList, SListCell* pCell) {
 }
 
 void nodesListInsertList(SNodeList* pTarget, SListCell* pPos, SNodeList* pSrc) {
-  if (NULL == pTarget || NULL == pPos || NULL == pSrc) {
+  if (NULL == pTarget || NULL == pPos || NULL == pSrc || NULL == pSrc->pHead) {
     return;
   }
 
diff --git a/source/libs/parser/src/parTranslater.c b/source/libs/parser/src/parTranslater.c
index 99dca701c9..b937eeb9d8 100644
--- a/source/libs/parser/src/parTranslater.c
+++ b/source/libs/parser/src/parTranslater.c
@@ -2935,6 +2935,9 @@ static int32_t translateSelectList(STranslateContext* pCxt, SSelectStmt* pSelect
   if (TSDB_CODE_SUCCESS == code) {
     code = translateFillValues(pCxt, pSelect);
   }
+  if (NULL == pSelect->pProjectionList || 0 >= pSelect->pProjectionList->length) {
+    code = TSDB_CODE_PAR_INVALID_SELECTED_EXPR;
+  }
   return code;
 }
 
diff --git a/source/libs/scalar/src/scalar.c b/source/libs/scalar/src/scalar.c
index 25938a7678..fe01977b2e 100644
--- a/source/libs/scalar/src/scalar.c
+++ b/source/libs/scalar/src/scalar.c
@@ -59,6 +59,8 @@ int32_t sclCreateColumnInfoData(SDataType *pType, int32_t numOfRows, SScalarPara
 
   pParam->columnData = pColumnData;
   pParam->colAlloced = true;
+  pParam->numOfRows = numOfRows;
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -740,6 +742,10 @@ int32_t sclExecFunction(SFunctionNode *node, SScalarCtx *ctx, SScalarParam *outp
       SCL_ERR_JRET(code);
     }
 
+    if (rowNum == 0) {
+      goto _return;
+    }
+
     code = (*ffpSet.process)(params, paramNum, output);
     if (code) {
       sclError("scalar function exec failed, funcId:%d, code:%s", node->funcId, tstrerror(code));
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 04e4859c5e..90f79fd93c 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -1082,21 +1082,15 @@ void syncNodePreClose(SSyncNode* pSyncNode) {
   ASSERT(pSyncNode->pFsm != NULL);
   ASSERT(pSyncNode->pFsm->FpApplyQueueItems != NULL);
 
-  while (1) {
-    int32_t aqItems = pSyncNode->pFsm->FpApplyQueueItems(pSyncNode->pFsm);
-    sTrace("vgId:%d, pre close, %d items in apply queue", pSyncNode->vgId, aqItems);
-    if (aqItems == 0 || aqItems == -1) {
-      break;
-    }
-    taosMsleep(20);
-  }
-
   // stop elect timer
   syncNodeStopElectTimer(pSyncNode);
 
   // stop heartbeat timer
   syncNodeStopHeartbeatTimer(pSyncNode);
 
+  // stop ping timer
+  syncNodeStopPingTimer(pSyncNode);
+
   // clean rsp
   syncRespCleanRsp(pSyncNode->pSyncRespMgr);
 }
@@ -1120,10 +1114,11 @@ void syncNodeClose(SSyncNode* pSyncNode) {
   if (pSyncNode == NULL) return;
   sNInfo(pSyncNode, "sync close, node:%p", pSyncNode);
 
+  syncRespCleanRsp(pSyncNode->pSyncRespMgr);
+
   syncNodeStopPingTimer(pSyncNode);
   syncNodeStopElectTimer(pSyncNode);
   syncNodeStopHeartbeatTimer(pSyncNode);
-
   syncNodeLogReplMgrDestroy(pSyncNode);
 
   syncRespMgrDestroy(pSyncNode->pSyncRespMgr);
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index b6f995b11e..50ed9fa61b 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -425,21 +425,6 @@ void cliHandleResp(SCliConn* conn) {
     tDebug("%s conn %p ref by app", CONN_GET_INST_LABEL(conn), conn);
   }
 
-  // if (TMSG_INFO(pHead->msgType - 1) != 0) {
-  //   char buf[128] = {0};
-  //   sprintf(buf, "%s", TMSG_INFO(pHead->msgType - 1));
-  //   int* count = taosHashGet(pThrd->msgCount, TMSG_INFO(pHead->msgType - 1), strlen(TMSG_INFO(pHead->msgType - 1)));
-  //   if (NULL == 0) {
-  //     int localCount = 1;
-  //     taosHashPut(pThrd->msgCount, TMSG_INFO(pHead->msgType - 1), strlen(TMSG_INFO(pHead->msgType - 1)), &localCount,
-  //                 sizeof(localCount));
-  //   } else {
-  //     int localCount = *count - 1;
-  //     taosHashPut(pThrd->msgCount, TMSG_INFO(pHead->msgType - 1), strlen(TMSG_INFO(pHead->msgType - 1)), &localCount,
-  //                 sizeof(localCount));
-  //   }
-  // }
-
   STraceId* trace = &transMsg.info.traceId;
   tGDebug("%s conn %p %s received from %s, local info:%s, len:%d, code str:%s", CONN_GET_INST_LABEL(conn), conn,
           TMSG_INFO(pHead->msgType), conn->dst, conn->src, pHead->msgLen, tstrerror(transMsg.code));
@@ -1118,19 +1103,6 @@ void cliSend(SCliConn* pConn) {
     msgLen = (int32_t)ntohl((uint32_t)(pHead->msgLen));
   }
 
-  // if (tmsgIsValid(pHead->msgType)) {
-  //   char buf[128] = {0};
-  //   sprintf(buf, "%s", TMSG_INFO(pHead->msgType));
-  //   int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
-  //   if (NULL == 0) {
-  //     int localCount = 1;
-  //     taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
-  //   } else {
-  //     int localCount = *count + 1;
-  //     taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
-  //   }
-  // }
-
   tGDebug("%s conn %p %s is sent to %s, local info %s, len:%d", CONN_GET_INST_LABEL(pConn), pConn,
           TMSG_INFO(pHead->msgType), pConn->dst, pConn->src, msgLen);
 
@@ -1525,16 +1497,19 @@ void cliHandleReq(SCliMsg* pMsg, SCliThrd* pThrd) {
     destroyCmsg(pMsg);
     return;
   }
-  if (tmsgIsValid(pMsg->msg.msgType)) {
-    char buf[128] = {0};
-    sprintf(buf, "%s", TMSG_INFO(pMsg->msg.msgType));
-    int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
-    if (NULL == 0) {
-      int localCount = 1;
-      taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
-    } else {
-      int localCount = *count + 1;
-      taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
+
+  if (rpcDebugFlag & DEBUG_TRACE) {
+    if (tmsgIsValid(pMsg->msg.msgType)) {
+      char buf[128] = {0};
+      sprintf(buf, "%s", TMSG_INFO(pMsg->msg.msgType));
+      int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
+      if (NULL == 0) {
+        int localCount = 1;
+        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
+      } else {
+        int localCount = *count + 1;
+        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
+      }
     }
   }
 
@@ -1782,18 +1757,20 @@ static void cliAsyncCb(uv_async_t* handle) {
   QUEUE_MOVE(&item->qmsg, &wq);
   taosThreadMutexUnlock(&item->mtx);
 
-  void* pIter = taosHashIterate(pThrd->msgCount, NULL);
-  while (pIter != NULL) {
-    int*   count = pIter;
-    size_t len = 0;
-    char*  key = taosHashGetKey(pIter, &len);
-    if (*count != 0) {
-      tDebug("key: %s count: %d", key, *count);
-    }
+  if (rpcDebugFlag & DEBUG_TRACE) {
+    void* pIter = taosHashIterate(pThrd->msgCount, NULL);
+    while (pIter != NULL) {
+      int*   count = pIter;
+      size_t len = 0;
+      char*  key = taosHashGetKey(pIter, &len);
+      if (*count != 0) {
+        tDebug("key: %s count: %d", key, *count);
+      }
 
-    pIter = taosHashIterate(pThrd->msgCount, pIter);
+      pIter = taosHashIterate(pThrd->msgCount, pIter);
+    }
+    tDebug("all conn count: %d", pThrd->newConnCount);
   }
-  tDebug("all conn count: %d", pThrd->newConnCount);
 
   int8_t supportBatch = pTransInst->supportBatch;
   if (supportBatch == 0) {
@@ -2379,17 +2356,18 @@ int cliAppCb(SCliConn* pConn, STransMsg* pResp, SCliMsg* pMsg) {
       tGTrace("%s conn %p extract epset from msg", CONN_GET_INST_LABEL(pConn), pConn);
     }
   }
-
-  if (tmsgIsValid(pResp->msgType - 1)) {
-    char buf[128] = {0};
-    sprintf(buf, "%s", TMSG_INFO(pResp->msgType - 1));
-    int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
-    if (NULL == 0) {
-      int localCount = 0;
-      taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
-    } else {
-      int localCount = *count - 1;
-      taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
+  if (rpcDebugFlag & DEBUG_TRACE) {
+    if (tmsgIsValid(pResp->msgType - 1)) {
+      char buf[128] = {0};
+      sprintf(buf, "%s", TMSG_INFO(pResp->msgType - 1));
+      int* count = taosHashGet(pThrd->msgCount, buf, sizeof(buf));
+      if (NULL == 0) {
+        int localCount = 0;
+        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
+      } else {
+        int localCount = *count - 1;
+        taosHashPut(pThrd->msgCount, buf, sizeof(buf), &localCount, sizeof(localCount));
+      }
     }
   }
   if (pCtx->pSem != NULL) {
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 33b562c8dd..a19a022b01 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -211,8 +211,8 @@ TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_BUFSIZE,     "Invalid func bufSize"
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_COMMENT,     "Invalid func comment")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_RETRIEVE,    "Invalid func retrieve msg")
 
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_TAG_INDEX_ALREADY_EXIST,  "Tag index already exists")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_TAG_INDEX_NOT_EXIST,  "Tag index not exists")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_TAG_INDEX_ALREADY_EXIST,  "index already exists")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_TAG_INDEX_NOT_EXIST,  "index not exist")
 
 
 // mnode-db
@@ -301,9 +301,9 @@ TAOS_DEFINE_ERROR(TSDB_CODE_MND_TOO_MANY_STREAMS,         "Too many streams")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_TARGET_TABLE,     "Cannot write the same stable as other stream")
 
 // mnode-sma
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_SMA_ALREADY_EXIST,        "SMA already exists")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_SMA_NOT_EXIST,            "SMA does not exist")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_SMA_OPTION,       "Invalid sma option")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_SMA_ALREADY_EXIST,        "index already exists")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_SMA_NOT_EXIST,            "index not exist")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_SMA_OPTION,       "Invalid sma index option")
 
 // dnode
 TAOS_DEFINE_ERROR(TSDB_CODE_DNODE_OFFLINE,                "Dnode is offline")