diff --git a/source/client/src/clientMain.c b/source/client/src/clientMain.c
index 5e442c4bf1194aa2c53e9021d9f728b42ef1d3ee..97275c03752d62398bed740eab0f22eaec8edeb8 100644
--- a/source/client/src/clientMain.c
+++ b/source/client/src/clientMain.c
@@ -199,7 +199,10 @@ TAOS_RES *taos_query(TAOS *taos, const char *sql) {
   taos_query_a(pTscObj, sql, syncQueryFn, param);
   tsem_wait(&param->sem);
 
-  return param->pRequest;
+  TAOS_RES *request = param->pRequest;
+  tsem_destroy(&param->sem);
+  taosMemoryFree(param);
+  return request;
 #else
   size_t sqlLen = strlen(sql);
   if (sqlLen > (size_t)TSDB_MAX_ALLOWED_SQL_LEN) {
diff --git a/source/client/src/clientSml.c b/source/client/src/clientSml.c
index bf60d259765563297ce0f78eb029dd6150c9f312..d63c93bd32f3f10eadd8f5699e13d71eec1a48c8 100644
--- a/source/client/src/clientSml.c
+++ b/source/client/src/clientSml.c
@@ -2261,7 +2261,7 @@ static int smlProcess(SSmlHandle *info, char* lines[], int numLines) {
   code = smlParseLine(info, lines, numLines);
   if (code != 0) {
     uError("SML:0x%"PRIx64" smlParseLine error : %s", info->id, tstrerror(code));
-    goto cleanup;
+    return code;
   }
 
   info->cost.lineNum = numLines;
@@ -2277,20 +2277,16 @@ static int smlProcess(SSmlHandle *info, char* lines[], int numLines) {
 
   if (code != 0) {
     uError("SML:0x%"PRIx64" smlModifyDBSchemas error : %s", info->id, tstrerror(code));
-    goto cleanup;
+    return code;
   }
 
   info->cost.insertBindTime = taosGetTimestampUs();
   code = smlInsertData(info);
   if (code != 0) {
     uError("SML:0x%"PRIx64" smlInsertData error : %s", info->id, tstrerror(code));
-    goto cleanup;
+    return code;
   }
-  info->cost.endTime = taosGetTimestampUs();
 
-cleanup:
-  info->cost.code = code;
-  smlPrintStatisticInfo(info);
   return code;
 }
 
@@ -2329,6 +2325,9 @@ static void smlInsertCallback(void* param, void* res, int32_t code) {
   printf("SML:0x%" PRIx64 " insert finished, code: %d, total: %d\n", info->id, code, info->affectedRows);
   Params *pParam = info->params;
   bool isLast = info->isLast;
+  info->cost.endTime = taosGetTimestampUs();
+  info->cost.code = code;
+  smlPrintStatisticInfo(info);
   smlDestroyInfo(info);
 
   if(isLast){
diff --git a/source/dnode/vnode/src/meta/metaQuery.c b/source/dnode/vnode/src/meta/metaQuery.c
index 063a78b0c64fda9f70d39c93a29ed66f8d4fdc20..ebf5098a058a68d61c3e4d115a02ad74f634ef53 100644
--- a/source/dnode/vnode/src/meta/metaQuery.c
+++ b/source/dnode/vnode/src/meta/metaQuery.c
@@ -86,11 +86,15 @@ tb_uid_t metaGetTableEntryUidByName(SMeta *pMeta, const char *name) {
   int      nData = 0;
   tb_uid_t uid = 0;
 
+  metaRLock(pMeta);
+
   if (tdbTbGet(pMeta->pNameIdx, name, strlen(name) + 1, &pData, &nData) == 0) {
     uid = *(tb_uid_t *)pData;
     tdbFree(pData);
   }
 
+  metaULock(pMeta);
+
   return 0;
 }
 
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 1524d8fe6fc246578c9732a8caceed0d823e6070..2f72a78c38d260796ce93c222095642dccb92785 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -787,7 +787,9 @@ static int32_t vnodeProcessSubmitReq(SVnode *pVnode, int64_t version, void *pReq
         msgIter.suid = 0;
       }
 
+#ifdef TD_DEBUG_PRINT_ROW
       vnodeDebugPrintSingleSubmitMsg(pVnode->pMeta, pBlock, &msgIter, "real uid");
+#endif
       tDecoderClear(&decoder);
     } else {
       submitBlkRsp.tblFName = taosMemoryMalloc(TSDB_TABLE_FNAME_LEN);