diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index ef15f44f8fe5452f15dbe07f8e67228b98e45ddb..1f26ab7c519016c5083008df005f98aa90fa67c8 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -347,12 +347,16 @@ static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
   taosThreadMutexInit(&tsLogObj.logMutex, NULL);
 
   taosUmaskFile(0);
-  tsLogObj.logHandle->pFile = taosOpenFile(fileName, TD_FILE_CTEATE | TD_FILE_WRITE);
+  TdFilePtr pFile = taosOpenFile(fileName, TD_FILE_CTEATE | TD_FILE_WRITE);
 
-  if (tsLogObj.logHandle->pFile == NULL) {
+  if (pFile == NULL) {
     printf("\nfailed to open log file:%s, reason:%s\n", fileName, strerror(errno));
     return -1;
   }
+  TdFilePtr pOldFile = tsLogObj.logHandle->pFile;
+  tsLogObj.logHandle->pFile = pFile;
+  taosUnLockLogFile(pOldFile);
+  taosCloseFile(&pOldFile);
   taosLockLogFile(tsLogObj.logHandle->pFile);
 
   // only an estimate for number of lines