urllib3.exceptions.MaxRetryError:HTTPConnectionPool(host=’’, port=): Max retries exceeded with url: ** /execute (Caused by NewConnectionError)

场景:
python selenium 爬虫测试
错误信息：

urllib3.exceptions.MaxRetryError:
HTTPConnectionPool(host=‘127.0.0.1’, port=60264): Max retries exceeded with url: /session/e01a77d0b37d544b76244f69c7d6a860/execute (Caused by NewConnectionError(’<urllib3.connection.HTTPConnection object at 0x00000214CF1B9F08>: Failed to establish a new connection: [WinError 10061] 由于目标计算机积极拒绝，无法连接。’))

分析原因:

Case I.端口被占用所致
Case II.采用爬虫工具selenium中，提前quit()（类似于<关闭服务>）后，又请求webdriver服务引起

采用方式：

引用socket进行ip查询，判断是否有端口被占用

code:

    def get_host_ip():
        """
        get host ip address
        获取本机IP地址

        :return:
        """
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        try:
            s.connect(('8.8.8.8', 80))
            ip = s.getsockname()[0]
        finally:
            s.close()

        return ip

    def is_port_used(ip, port):
        """
        check whether the port is used by other program
        检测端口是否被占用

        :param ip:
        :param port:
        :return:
        """
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        try:
            s.connect((ip, port))
            return True
        except OSError:
            return False
        finally:
            s.close()

    print(1, is_port_used(get_host_ip(), 80))

增加最大重试次数

requests.adapters.DEFAULT_RETRIES = 5
session = requests.session()
session.keep_alive = False

未果，打断点寻找情况2的原因

发现迭代代码块中有，提前quit后，继续请求webdriver相关服务所致.
晕 (´థ౪థ)σ

五一快乐，祝你快落

完毕.