python network_error ai_generated true

httpx.ConnectTimeout: Connection timed out after 5000ms to host 'api.example.com' (DNS resolution failed)

ID: python/httpx-connecttimeout-dns-resolution

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
0Evidence
2024-02-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

The DNS server cannot resolve the hostname, possibly due to network misconfiguration or DNS server unavailability.

generic

中文

DNS服务器无法解析主机名，可能是由于网络配置错误或DNS服务器不可用。

Workarounds

  1. 70% success Use an IP address directly instead of hostname 
    client = httpx.Client()
response = client.get('http://93.184.216.34')
  2. 90% success Configure a custom DNS resolver in the system or use a different DNS server 
    import socket
socket.setdefaulttimeout(10)
# Or change /etc/resolv.conf (Linux) or network settings (Windows)

Dead Ends

Common approaches that don't work:

  1. Increasing timeout to a very high value 80% fail

    Timeout increase does not fix DNS resolution; the request will still hang if DNS fails.

  2. Restarting the application without checking DNS configuration 90% fail

    The underlying DNS issue persists across restarts.