python network_error ai_generated true

aiohttp.client_exceptions.ServerTimeoutError: Connection timeout to host https://slow.example.com

ID: python/aiohttp-connector-timeout

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2024-07-03First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.8 active — — —
3.9 active — — —
3.10 active — — —
3.11 active — — —
3.12 active — — —

Root Cause

The server did not complete the TCP/TLS handshake or respond within the configured aiohttp.ClientTimeout, often because of an overloaded endpoint or a too-aggressive default timeout.

generic

中文

服务器未在配置的 aiohttp.ClientTimeout 内完成 TCP/TLS 握手或响应，通常是因为端点过载或超时设置过于激进。

Workarounds

  1. 90% success 
    timeout = aiohttp.ClientTimeout(total=30, connect=5, sock_read=10)
async with aiohttp.ClientSession(timeout=timeout) as s:
    await s.get(url)
  2. 85% success 
    for i in range(3):
    try:
        async with session.get(url) as r:
            return await r.text()
    except aiohttp.ServerTimeoutError:
        await asyncio.sleep(2 ** i)

Dead Ends

Common approaches that don't work:

  1. 90% fail

    Hangs forever on dead hosts and exhausts connection pool slots.

  2. 75% fail

    Handshake still fails on the sock_connect phase before the total timer matters.