项目中有个模块是定时获取设备状态的，通过设备的http请求访问获取返回的状态码，然后根据状态码检测设备是否在线。但是最近发现连接后出现了偶尔连接不上的情况，报错如下：

2018-06-14 15:51:42,076 - configuration_model - ERROR - HTTPSConnectionPool(host='10.1.1.1', port=443): Max retries exceeded with url: /api/1.0/device/status (Caused by ConnectTimeoutError(, 'Connection to 10.1.1.1 timed out. (connect timeout=2)'))2018-06-14 15:51:48,475 - configuration_model - ERROR - HTTPSConnectionPool(host='10.1.1.1', port=443): Max retries exceeded with url: /api/1.0/device/status (Caused by ConnectTimeoutError(, 'Connection to 10.1.1.1 timed out. (connect timeout=2)'))2018-06-14 15:51:55,003 - configuration_model - ERROR - HTTPSConnectionPool(host='10.1.1.1', port=443): Max retries exceeded with url: /api/1.0/device/status (Caused by ConnectTimeoutError(, 'Connection to 10.1.1.1 timed out. (connect timeout=2)'))

最初怀疑是网络原因，写了个定时脚本，看能否稳定复现这个问题：

#coding:utf-8

import requests

from requests.auth import HTTPBasicAuth

import json

import time

import logging

import logging.handlers

from mlogging import TimedRotatingFileHandler_MP

logging.captureWarnings(True)

def get_logger(logger_fie = "/home/test/testTacConnect.log"):

logger = logging.getLogger(logger_fie)

logger.setLevel(logging.DEBUG)

filehandle = TimedRotatingFileHandler_MP(logger_fie, 'midnight')

filehandle.suffix = "%Y-%m-%d"

filehandle.setLevel(logging.DEBUG)

consolehandle = logging.StreamHandler()

consolehandle.setLevel(logging.DEBUG)

formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

filehandle.setFormatter(formatter)

consolehandle.setFormatter(formatter)

logger.addHandler(filehandle)

logger.addHandler(consolehandle)

return logger

def getTacstatus(userName, password, tacip, EXITTIME = 2):

# 设备请求超时时间，默认为2秒

status = "0"

try:

url = "https://%s/api/1.0/device/status"%(tacip,)

req = requests.post(url, auth=HTTPBasicAuth(userName, password), timeout=EXITTIME, verify=False)

result = json.loads(req.content)

if result.get(u'code') == 200:

status = "1"

except Exception as e:

logger.error(e)

return status

if __name__ == '__main__':

tacip = '10.1.1.1'

userName = '*****'

password = '*******'

logger = get_logger()

while True:

status = getTacstatus(userName,password,tacip)

if status != 1:

logger.debug(status)

time.sleep(10)

运行了1个小时之后，异常状态出现了，request请求报了Max retries exceeded with url。

看了下网上的相关论坛，发现是http请求连接太多没有关闭造成的，在request对象获取session，然后设置下状态，如下：

sess = requests.session()

sess.keep_alive = False

更新了代码，在测试脚本运行，观察中。