diff --git a/source/util/src/tconfig.c b/source/util/src/tconfig.c
index e29a21d08eeb4051602e7749be47444be291e365..dc9fa33595defda2234d51f4c936a02551b7cefb 100644
--- a/source/util/src/tconfig.c
+++ b/source/util/src/tconfig.c
@@ -96,6 +96,7 @@ void cfgCleanup(SConfig *pCfg) {
       SConfigItem *pItem = taosHashIterate(pCfg->hash, NULL);
       while (pItem != NULL) {
         cfgFreeItem(pItem);
+        tfree(pItem->name);
         pItem = taosHashIterate(pCfg->hash, pItem);
       }
       taosHashCleanup(pCfg->hash);
@@ -249,9 +250,7 @@ static int32_t cfgSetString(SConfigItem *pItem, const char *value, ECfgSrcType s
 }
 
 static int32_t cfgSetDir(SConfigItem *pItem, const char *value, ECfgSrcType stype) {
-  char *tmp = strdup(value);
-  if (tmp == NULL || cfgCheckAndSetDir(pItem, value) != 0) {
-    free(tmp);
+  if (cfgCheckAndSetDir(pItem, value) != 0) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     uError("cfg:%s, type:%s src:%s value:%s failed to dup since %s, use last src:%s value:%s", pItem->name,
            cfgDtypeStr(pItem->dtype), cfgStypeStr(stype), value, terrstr(), cfgStypeStr(pItem->stype), pItem->str);
@@ -263,9 +262,7 @@ static int32_t cfgSetDir(SConfigItem *pItem, const char *value, ECfgSrcType styp
 }
 
 static int32_t cfgSetLocale(SConfigItem *pItem, const char *value, ECfgSrcType stype) {
-  char *tmp = strdup(value);
-  if (tmp == NULL || cfgCheckAndSetLocale(pItem, value) != 0) {
-    free(tmp);
+  if (cfgCheckAndSetLocale(pItem, value) != 0) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     uError("cfg:%s, type:%s src:%s value:%s failed to dup since %s, use last src:%s value:%s", pItem->name,
            cfgDtypeStr(pItem->dtype), cfgStypeStr(stype), value, terrstr(), cfgStypeStr(pItem->stype), pItem->str);
@@ -277,9 +274,7 @@ static int32_t cfgSetLocale(SConfigItem *pItem, const char *value, ECfgSrcType s
 }
 
 static int32_t cfgSetCharset(SConfigItem *pItem, const char *value, ECfgSrcType stype) {
-  char *tmp = strdup(value);
-  if (tmp == NULL || cfgCheckAndSetCharset(pItem, value) != 0) {
-    free(tmp);
+  if (cfgCheckAndSetCharset(pItem, value) != 0) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     uError("cfg:%s, type:%s src:%s value:%s failed to dup since %s, use last src:%s value:%s", pItem->name,
            cfgDtypeStr(pItem->dtype), cfgStypeStr(stype), value, terrstr(), cfgStypeStr(pItem->stype), pItem->str);
@@ -291,9 +286,7 @@ static int32_t cfgSetCharset(SConfigItem *pItem, const char *value, ECfgSrcType
 }
 
 static int32_t cfgSetTimezone(SConfigItem *pItem, const char *value, ECfgSrcType stype) {
-  char *tmp = strdup(value);
-  if (tmp == NULL || cfgCheckAndSetTimezone(pItem, value) != 0) {
-    free(tmp);
+  if (cfgCheckAndSetTimezone(pItem, value) != 0) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     uError("cfg:%s, type:%s src:%s value:%s failed to dup since %s, use last src:%s value:%s", pItem->name,
            cfgDtypeStr(pItem->dtype), cfgStypeStr(stype), value, terrstr(), cfgStypeStr(pItem->stype), pItem->str);
diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index e8963c97850f7b32197c28a72cb81857cc6643f5..2ed8d6e347357f458e3035b6e877717cda669d50 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -135,8 +135,6 @@ static void taosStopLog() {
 
 void taosCloseLog() {
   taosStopLog();
-  // tsem_post(&(tsLogObj.logHandle->buffNotEmpty));
-  taosMsleep(LOG_MAX_INTERVAL / 1000);
   if (taosCheckPthreadValid(tsLogObj.logHandle->asyncThread)) {
     pthread_join(tsLogObj.logHandle->asyncThread, NULL);
   }
@@ -495,12 +493,6 @@ void taosPrintLongString(const char *flags, int32_t dflag, const char *format, .
   if (dflag & DEBUG_SCREEN) write(1, buffer, (uint32_t)len);
 }
 
-#if 0
-void taosCloseLog() { 
-  taosCloseLogByFd(tsLogObj.logHandle->pFile); 
-}
-#endif
-
 static void taosCloseLogByFd(TdFilePtr pFile) {
   if (pFile != NULL) {
     taosUnLockLogFile(pFile);
@@ -533,15 +525,6 @@ _err:
   return NULL;
 }
 
-#if 0
-static void taosLogBuffDestroy(SLogBuff *tLogBuff) {
-  tsem_destroy(&(tLogBuff->buffNotEmpty));
-  pthread_mutex_destroy(&(tLogBuff->buffMutex));
-  free(tLogBuff->buffer);
-  tfree(tLogBuff);
-}
-#endif
-
 static void taosCopyLogBuffer(SLogBuff *tLogBuff, int32_t start, int32_t end, char *msg, int32_t msgLen) {
   if (start > end) {
     memcpy(LOG_BUF_BUFFER(tLogBuff) + end, msg, msgLen);