http请求报错SSLError: HTTPSConnectionPool:Max retries exceeded with url

1、问题描述：

迭代请求http web服务，中途遇到异常报错：

requests.exceptions.SSLError: HTTPSConnectionPool(host='xxx.com', port=443): Max retries exceeded with url:xxx

2、问题排查

# 源代码
response = requests.request("POST", url=url, headers=headers, data=payload)

3、问题原因：

http的连接数超过最大限制。默认的情况下连接是keep-alive的，所以导致服务器保持了太多连接而不能再新建连接

4、解决方法：

每次请求完成后，主动关闭请求

response = requests.request("POST", url=url, headers=headers, data=payload)
response.close()

参考：爬虫遇到 HTTPSConnectionPool(host=‘xxxxx‘, port=443) 解决思路_自学AI的鲨鱼儿的博客-CSDN博客_port=443

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