app脚本启动失败，超过最大连接数

启动脚本突然appium说超过最大连接数，报错如下

1. ```bash urllib3.exceptions.MaxRetryError:
HTTPConnectionPool(host='127.0.0.1', port=4723): Max retries
exceeded with url: /wd/hub/session (Caused by
NewConnectionError('<urllib3.connection.HTTPConnection object at
0x104646908>: Failed to establish a new connection: [Errno 61]
Connection refused',)) ```

解决方法如下：
将adb服务关闭：

adb kill-server

adb start-server