diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index e1d255ee76..761dce6720 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -367,6 +367,7 @@ void sdbCleanUp() {
   tsSdbObj.status = SDB_STATUS_CLOSING;
   
   sdbCleanupWriteWorker();
+  sdbDebug("sdb will be closed, version:%" PRId64, tsSdbObj.version);
 
   if (tsSdbObj.sync) {
     syncStop(tsSdbObj.sync);
diff --git a/src/mnode/src/mnodeShow.c b/src/mnode/src/mnodeShow.c
index 6f5216dfa3..06ef2cb452 100644
--- a/src/mnode/src/mnodeShow.c
+++ b/src/mnode/src/mnodeShow.c
@@ -281,6 +281,7 @@ static int32_t mnodeProcessHeartBeatMsg(SMnodeMsg *pMsg) {
 
 static int32_t mnodeProcessConnectMsg(SMnodeMsg *pMsg) {
   SCMConnectMsg *pConnectMsg = pMsg->rpcMsg.pCont;
+  SCMConnectRsp *pConnectRsp = NULL;
   int32_t code = TSDB_CODE_SUCCESS;
 
   SRpcConnInfo connInfo;
@@ -309,7 +310,7 @@ static int32_t mnodeProcessConnectMsg(SMnodeMsg *pMsg) {
     mnodeDecDbRef(pDb);
   }
 
-  SCMConnectRsp *pConnectRsp = rpcMallocCont(sizeof(SCMConnectRsp));
+  pConnectRsp = rpcMallocCont(sizeof(SCMConnectRsp));
   if (pConnectRsp == NULL) {
     code = TSDB_CODE_MND_OUT_OF_MEMORY;
     goto connect_over;
@@ -332,7 +333,7 @@ static int32_t mnodeProcessConnectMsg(SMnodeMsg *pMsg) {
 
 connect_over:
   if (code != TSDB_CODE_SUCCESS) {
-    rpcFreeCont(pConnectRsp);
+    if (pConnectRsp) rpcFreeCont(pConnectRsp);
     mLError("user:%s login from %s, result:%s", connInfo.user, taosIpStr(connInfo.clientIp), tstrerror(code));
   } else {
     mLInfo("user:%s login from %s, result:%s", connInfo.user, taosIpStr(connInfo.clientIp), tstrerror(code));
diff --git a/src/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 12db79182e..d3b9081a36 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -111,7 +111,7 @@ int tsdbInsertRowToMem(STsdbRepo *pRepo, SDataRow row, STable *pTable) {
     ASSERT(pTableData->numOfRows == tSkipListGetSize(pTableData->pData));
   }
 
-  tsdbDebug("vgId:%d a row is inserted to table %s tid %d uid %" PRIu64 " key %" PRIu64, REPO_ID(pRepo),
+  tsdbTrace("vgId:%d a row is inserted to table %s tid %d uid %" PRIu64 " key %" PRIu64, REPO_ID(pRepo),
             TABLE_CHAR_NAME(pTable), TABLE_TID(pTable), TABLE_UID(pTable), key);
 
   return 0;
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index b769a87beb..3b25d68896 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -596,7 +596,7 @@ static int tsdbRestoreTable(void *pHandle, void *cont, int contLen) {
     return -1;
   }
 
-  tsdbDebug("vgId:%d table %s tid %d uid %" PRIu64 " is restored from file", REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
+  tsdbTrace("vgId:%d table %s tid %d uid %" PRIu64 " is restored from file", REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
             TABLE_TID(pTable), TABLE_UID(pTable));
   return 0;
 }
@@ -797,7 +797,7 @@ static int tsdbAddTableToMeta(STsdbRepo *pRepo, STable *pTable, bool addIdx) {
     pTable->cqhandle = (*pRepo->appH.cqCreateFunc)(pRepo->appH.cqH, TABLE_UID(pTable), TABLE_TID(pTable), pTable->sql, tsdbGetTableSchema(pTable));
   }
 
-  tsdbDebug("vgId:%d table %s tid %d uid %" PRIu64 " is added to meta", REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
+  tsdbTrace("vgId:%d table %s tid %d uid %" PRIu64 " is added to meta", REPO_ID(pRepo), TABLE_CHAR_NAME(pTable),
             TABLE_TID(pTable), TABLE_UID(pTable));
   return 0;
 
diff --git a/src/util/src/tqueue.c b/src/util/src/tqueue.c
index b499f34060..f4f7904968 100644
--- a/src/util/src/tqueue.c
+++ b/src/util/src/tqueue.c
@@ -100,7 +100,7 @@ void *taosAllocateQitem(int size) {
 void taosFreeQitem(void *param) {
   if (param == NULL) return;
 
-  uDebug("item:%p is freed", param);
+  uTrace("item:%p is freed", param);
   char *temp = (char *)param;
   temp -= sizeof(STaosQnode);
   free(temp);
@@ -124,7 +124,7 @@ int taosWriteQitem(taos_queue param, int type, void *item) {
 
   queue->numOfItems++;
   if (queue->qset) atomic_add_fetch_32(&queue->qset->numOfItems, 1);
-  uDebug("item:%p is put into queue:%p, type:%d items:%d", item, queue, type, queue->numOfItems);
+  uTrace("item:%p is put into queue:%p, type:%d items:%d", item, queue, type, queue->numOfItems);
 
   pthread_mutex_unlock(&queue->mutex);
 
@@ -206,7 +206,7 @@ int taosGetQitem(taos_qall param, int *type, void **pitem) {
     *pitem = pNode->item;
     *type = pNode->type;
     num = 1;
-    uDebug("item:%p is fetched, type:%d", *pitem, *type);
+    uTrace("item:%p is fetched, type:%d", *pitem, *type);
   }
 
   return num;
@@ -344,7 +344,7 @@ int taosReadQitemFromQset(taos_qset param, int *type, void **pitem, void **phand
         queue->numOfItems--;
         atomic_sub_fetch_32(&qset->numOfItems, 1);
         code = 1;
-        uDebug("item:%p is read out from queue:%p, type:%d items:%d", *pitem, queue, *type, queue->numOfItems);
+        uTrace("item:%p is read out from queue:%p, type:%d items:%d", *pitem, queue, *type, queue->numOfItems);
     } 
 
     pthread_mutex_unlock(&queue->mutex);
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index f43d10a7a3..171557acb6 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -94,7 +94,7 @@ static int32_t vnodeProcessSubmitMsg(SVnodeObj *pVnode, void *pCont, SRspRet *pR
 
   // save insert result into item
 
-  vDebug("vgId:%d, submit msg is processed", pVnode->vgId);
+  vTrace("vgId:%d, submit msg is processed", pVnode->vgId);
   
   pRet->len = sizeof(SShellSubmitRspMsg);
   pRet->rsp = rpcMallocCont(pRet->len);