diff --git a/internal/msggateway/n_ws_server.go b/internal/msggateway/n_ws_server.go
index 69fa37680..d90ab8ec8 100644
--- a/internal/msggateway/n_ws_server.go
+++ b/internal/msggateway/n_ws_server.go
@@ -124,11 +124,13 @@ func (ws *WsServer) registerClient(client *Client) {
 	)
 	cli, userOK, clientOK = ws.clients.Get(client.userID, client.platformID)
 	if !userOK {
+		log.ZDebug(client.ctx, "user not exist", "userID", client.userID, "platformID", client.platformID)
 		ws.clients.Set(client.userID, client)
 		atomic.AddInt64(&ws.onlineUserNum, 1)
 		atomic.AddInt64(&ws.onlineUserConnNum, 1)
 
 	} else {
+		log.ZDebug(client.ctx, "user exist", "userID", client.userID, "platformID", client.platformID)
 		if clientOK { //已经有同平台的连接存在
 			ws.clients.Set(client.userID, client)
 			ws.multiTerminalLoginChecker(cli)
diff --git a/internal/msggateway/user_map.go b/internal/msggateway/user_map.go
index 87699b915..9f14bb3de 100644
--- a/internal/msggateway/user_map.go
+++ b/internal/msggateway/user_map.go
@@ -1,6 +1,10 @@
 package msggateway
 
-import "sync"
+import (
+	"context"
+	"github.com/OpenIMSDK/Open-IM-Server/pkg/common/log"
+	"sync"
+)
 
 type UserMap struct {
 	m sync.Map
@@ -36,10 +40,12 @@ func (u *UserMap) Get(key string, platformID int) ([]*Client, bool, bool) {
 func (u *UserMap) Set(key string, v *Client) {
 	allClients, existed := u.m.Load(key)
 	if existed {
+		log.ZDebug(context.Background(), "Set existed", "user_id", key, "client", v)
 		oldClients := allClients.([]*Client)
 		oldClients = append(oldClients, v)
 		u.m.Store(key, oldClients)
 	} else {
+		log.ZDebug(context.Background(), "Set not existed", "user_id", key, "client", v)
 		var clients []*Client
 		clients = append(clients, v)
 		u.m.Store(key, clients)