diff --git a/source/os/src/osFile.c b/source/os/src/osFile.c
index 1b73f96896..a7855539a4 100644
--- a/source/os/src/osFile.c
+++ b/source/os/src/osFile.c
@@ -325,7 +325,7 @@ int64_t taosReadFile(TdFilePtr pFile, void *buf, int64_t count) {
 #if FILE_WITH_LOCK
   taosThreadRwlockRdlock(&(pFile->rwlock));
 #endif
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
   int64_t leftbytes = count;
   int64_t readbytes;
   char   *tbuf = (char *)buf;
@@ -365,7 +365,7 @@ int64_t taosPReadFile(TdFilePtr pFile, void *buf, int64_t count, int64_t offset)
 #if FILE_WITH_LOCK
   taosThreadRwlockRdlock(&(pFile->rwlock));
 #endif
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
   int64_t ret = pread(pFile->fd, buf, count, offset);
 #if FILE_WITH_LOCK
   taosThreadRwlockUnlock(&(pFile->rwlock));
@@ -380,7 +380,7 @@ int64_t taosWriteFile(TdFilePtr pFile, const void *buf, int64_t count) {
 #if FILE_WITH_LOCK
   taosThreadRwlockWrlock(&(pFile->rwlock));
 #endif
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
 
   int64_t nleft = count;
   int64_t nwritten = 0;
@@ -414,7 +414,7 @@ int64_t taosLSeekFile(TdFilePtr pFile, int64_t offset, int32_t whence) {
 #if FILE_WITH_LOCK
   taosThreadRwlockRdlock(&(pFile->rwlock));
 #endif
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
   int64_t ret = lseek(pFile->fd, (long)offset, whence);
 #if FILE_WITH_LOCK
   taosThreadRwlockUnlock(&(pFile->rwlock));
@@ -429,7 +429,7 @@ int32_t taosFStatFile(TdFilePtr pFile, int64_t *size, int32_t *mtime) {
   if (pFile == NULL) {
     return 0;
   }
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
 
   struct stat fileStat;
   int32_t code = fstat(pFile->fd, &fileStat);
@@ -456,7 +456,7 @@ int32_t taosLockFile(TdFilePtr pFile) {
   if (pFile == NULL) {
     return 0;
   }
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
 
   return (int32_t)flock(pFile->fd, LOCK_EX | LOCK_NB);
 #endif
@@ -469,7 +469,7 @@ int32_t taosUnLockFile(TdFilePtr pFile) {
   if (pFile == NULL) {
     return 0;
   }
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
 
   return (int32_t)flock(pFile->fd, LOCK_UN | LOCK_NB);
 #endif
@@ -529,7 +529,7 @@ int32_t taosFtruncateFile(TdFilePtr pFile, int64_t l_size) {
   if (pFile == NULL) {
     return 0;
   }
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
 
   return ftruncate(pFile->fd, l_size);
 #endif
@@ -750,7 +750,7 @@ void *taosMmapReadOnlyFile(TdFilePtr pFile, int64_t length) {
   if (pFile == NULL) {
     return NULL;
   }
-  assert(pFile->fd >= 0);
+  assert(pFile->fd >= 0); // Please check if you have closed the file.
 
   void *ptr = mmap(NULL, length, PROT_READ, MAP_SHARED, pFile->fd, 0);
   return ptr;
diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index 1f26ab7c51..563acfec78 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -214,6 +214,7 @@ static void *taosThreadToOpenNewFile(void *param) {
   tsLogObj.logHandle->pFile = pFile;
   tsLogObj.lines = 0;
   tsLogObj.openInProgress = 0;
+  taosSsleep(3);
   taosCloseLogByFd(pOldFile);
 
   uInfo("   new log file:%d is opened", tsLogObj.flag);
@@ -347,16 +348,12 @@ static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
   taosThreadMutexInit(&tsLogObj.logMutex, NULL);
 
   taosUmaskFile(0);
-  TdFilePtr pFile = taosOpenFile(fileName, TD_FILE_CTEATE | TD_FILE_WRITE);
+  tsLogObj.logHandle->pFile = taosOpenFile(fileName, TD_FILE_CTEATE | TD_FILE_WRITE);
 
-  if (pFile == NULL) {
+  if (tsLogObj.logHandle->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