diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index e656193e1fb3510f34cb271676c0f57790073e47..34fa13b279ba7baf25b2fb08ebfe31b15a2bc032 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -1502,7 +1502,10 @@ static int32_t syncForwardToPeerImpl(SSyncNode *pNode, void *data, void *mhandle
       }
     }
 
-    int32_t retLen = taosWriteMsg(pPeer->peerFd, pSyncHead, fwdLen);
+    SOCKET peerFd = pPeer->peerFd;
+    pthread_mutex_unlock(&pNode->mutex);
+    int32_t retLen = taosWriteMsg(peerFd, pSyncHead, fwdLen);
+    pthread_mutex_lock(&pNode->mutex);
     if (retLen == fwdLen) {
       sTrace("%s, forward is sent, role:%s sstatus:%s hver:%" PRIu64 " contLen:%d", pPeer->id, syncRole[pPeer->role],
              syncStatus[pPeer->sstatus], pWalHead->version, pWalHead->len);