python network_error ai_generated true

requests.exceptions.ConnectionError: HTTPConnectionPool(host='nonexistent.example.com', port=80): 超过最大重试次数 (由NewConnectionError('<urllib3.connection.HTTPConnection object at 0x...>: 无法建立新连接：[Errno -2] 名称或服务未知')引起)

requests.exceptions.ConnectionError: HTTPConnectionPool(host='nonexistent.example.com', port=80): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x...>: Failed to establish a new connection: [Errno -2] Name or service not known'))

ID: python/requests-connectionerror-dns-failure

其他格式: JSON · Markdown 中文 · English
80%修复率
84%置信度
0证据数
2024-05-12首次发现

版本兼容性

版本状态引入弃用备注
3.x active — — —

根因分析

主机名无法解析为IP地址，因为它不存在或DNS配置错误。

English

The hostname cannot be resolved to an IP address because it does not exist or DNS is misconfigured.

generic

解决方案

  1. 90% 成功率 Verify the hostname spelling and domain existence 
    Check the URL for typos, e.g., requests.get('https://example.com') instead of 'exampl.com'
  2. 80% 成功率 Use a public DNS server like 8.8.8.8 
    Configure system DNS to 8.8.8.8 or use socket.setdefaulttimeout(10) with a custom resolver

无效尝试

常见但无效的做法:

  1. Increasing the retry count 95% 失败

    Retrying does not fix DNS resolution; the hostname remains unresolved.

  2. Using a VPN or proxy without checking DNS 70% 失败

    A VPN may change DNS servers, but if the hostname is invalid, it still fails.