Check if connection timeout is invalid in cluster mode

[FangPengbo]

standalone mode

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
rdb := redis.NewClient(&redis.Options{
			Addr:     u.IP,
			Password: u.Password,
		})
		result, err := rdb.Ping(ctx).Result()
		if err != nil {
			defer cancel()
			if errors.Is(err, context.DeadlineExceeded) {
				return res, errors.New("redis connection timed out")
			}
			return ‘’, err
		}

Effective, return redis connection timed out in 5 seconds

cluster mode

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
rdb := redis.NewClusterClient(&redis.ClusterOptions{
			Addrs:    strings.Split(u.IP, `,`),
			Password: u.Password,
		})
		result, err := rdb.Ping(ctx).Result()
		if err != nil {
			defer cancel()
			if errors.Is(err, context.DeadlineExceeded) {
				return res, errors.New("redis connection timed out")
			}
			return ‘’, err
		}

It is invalid no matter how the context is modified WithTimeout will return after 12 seconds

Does anyone know what's going on?