diff --git a/src/sync/src/syncRetrieve.c b/src/sync/src/syncRetrieve.c
index be4073760dfa551878301bc3bd4f2405b12b77cf..57472851df308bd75a996d8b18e46ec7f5bab053 100644
--- a/src/sync/src/syncRetrieve.c
+++ b/src/sync/src/syncRetrieve.c
@@ -334,7 +334,7 @@ static int64_t syncRetrieveWal(SSyncPeer *pPeer) {
       break;
     }
 
-    code = (int32_t)taosSendFile(pPeer->syncFd, sfd, NULL, size);
+    code = taosSendFile(pPeer->syncFd, sfd, NULL, size);
     close(sfd);
     if (code < 0) {
       sError("%s, failed to send wal:%s for retrieve since %s, code:0x%" PRIx64, pPeer->id, fname, strerror(errno), code);
diff --git a/src/util/inc/tsocket.h b/src/util/inc/tsocket.h
index 35b591b61e007dcf6d4edc39810a60454f37c07a..b4f55169594589b83c299694723cb234bd21ed7d 100644
--- a/src/util/inc/tsocket.h
+++ b/src/util/inc/tsocket.h
@@ -28,7 +28,7 @@ int32_t taosReadn(SOCKET sock, char *buffer, int32_t len);
 int32_t taosWriteMsg(SOCKET fd, void *ptr, int32_t nbytes);
 int32_t taosReadMsg(SOCKET fd, void *ptr, int32_t nbytes);
 int32_t taosNonblockwrite(SOCKET fd, char *ptr, int32_t nbytes);
-int32_t taosCopyFds(SOCKET sfd, int32_t dfd, int64_t len);
+int64_t taosCopyFds(SOCKET sfd, int32_t dfd, int64_t len);
 int32_t taosSetNonblocking(SOCKET sock, int32_t on);
 
 SOCKET  taosOpenUdpSocket(uint32_t localIp, uint16_t localPort);
diff --git a/src/util/src/tsocket.c b/src/util/src/tsocket.c
index e07587686774cb0fa6c7682daca59b400a9451ec..8911b7e8ee1bb6c3ac1ee28ceeabc80f2a8ed4ab 100644
--- a/src/util/src/tsocket.c
+++ b/src/util/src/tsocket.c
@@ -465,36 +465,36 @@ void tinet_ntoa(char *ipstr, uint32_t ip) {
 #define COPY_SIZE 32768
 // sendfile shall be used
 
-int32_t taosCopyFds(SOCKET sfd, int32_t dfd, int64_t len) {
+int64_t taosCopyFds(SOCKET sfd, int32_t dfd, int64_t len) {
   int64_t leftLen;
-  int32_t readLen, writeLen;
+  int64_t readLen, writeLen;
   char    temp[COPY_SIZE];
 
   leftLen = len;
 
   while (leftLen > 0) {
     if (leftLen < COPY_SIZE)
-      readLen = (int32_t)leftLen;
+      readLen = leftLen;
     else
       readLen = COPY_SIZE;  // 4K
 
-    int32_t retLen = taosReadMsg(sfd, temp, (int32_t)readLen);
+    int64_t retLen = taosReadMsg(sfd, temp, (int32_t)readLen);
     if (readLen != retLen) {
-      uError("read error, readLen:%d retLen:%d len:%" PRId64 " leftLen:%" PRId64 ", reason:%s", readLen, retLen, len,
-             leftLen, strerror(errno));
+      uError("read error, readLen:%" PRId64 " retLen:%" PRId64 " len:%" PRId64 " leftLen:%" PRId64 ", reason:%s",
+             readLen, retLen, len, leftLen, strerror(errno));
       return -1;
     }
 
     writeLen = taosWriteMsg(dfd, temp, readLen);
 
     if (readLen != writeLen) {
-      uError("copy error, readLen:%d writeLen:%d len:%" PRId64 " leftLen:%" PRId64 ", reason:%s", readLen, writeLen,
-             len, leftLen, strerror(errno));
+      uError("copy error, readLen:%" PRId64 " writeLen:%" PRId64 " len:%" PRId64 " leftLen:%" PRId64 ", reason:%s",
+             readLen, writeLen, len, leftLen, strerror(errno));
       return -1;
     }
 
     leftLen -= readLen;
   }
 
-  return (int32_t)len;
+  return len;
 }