log bad ack

server/src/Router.ts

@@ -58,6 +58,8 @@ export class Router {
     } else if (this.seq == 0) { // 服务器重启或客户端下线
       this.time = Date.now();
       this.send(socket, {}, {});
+    } else {
+      console.log(`ignoring packet from ${data.id}, packet ack=${data.ack}, server seq=${this.seq}`);
     }
   }