diff --git a/kernel/model/sync.go b/kernel/model/sync.go
index e33263772..3dc8c0899 100644
--- a/kernel/model/sync.go
+++ b/kernel/model/sync.go
@@ -695,6 +695,10 @@ func connectSyncWebSocket() {
 				reconnected := false
 				for retries := 0; retries < 7; retries++ {
 					time.Sleep(7 * time.Second)
+					if nil == Conf.User {
+						return
+					}
+
 					//logging.LogInfof("reconnecting sync websocket...")
 					webSocketConn, dialErr = dialSyncWebSocket()
 					if nil != dialErr {
@@ -743,7 +747,6 @@ func connectSyncWebSocket() {
 var KernelID = gulu.Rand.String(7)
 
 func dialSyncWebSocket() (c *websocket.Conn, err error) {
-	//endpoint := "ws://127.0.0.1:64388" + "/apis/siyuan/dejavu/ws"
 	endpoint := util.GetCloudWebSocketServer() + "/apis/siyuan/dejavu/ws"
 	header := http.Header{
 		"x-siyuan-uid":      []string{Conf.User.UserId},