python network_error ai_generated true

asyncio 异常：连接主机超时

asyncio.exceptions.TimeoutError: Connection timeout to host

ID: python/aiohttp-client-connector-timeout

其他格式: JSON · Markdown 中文 · English
80%修复率
82%置信度
0证据数
2024-09-01首次发现

版本兼容性

版本状态引入弃用备注
3.10 active — — —
3.11 active — — —

根因分析

与远程主机的 TCP 连接耗时超过指定的超时时间，通常是由于网络问题或服务器过载。

English

The TCP connection to the remote host takes longer than the specified timeout, often due to network issues or server overload.

generic

解决方案

  1. 85% 成功率 Implement exponential backoff retry logic 
    import asyncio
async def fetch_with_retry(url, max_retries=3):
    for i in range(max_retries):
        try:
            async with session.get(url, timeout=aiohttp.ClientTimeout(total=10)) as resp:
                return await resp.text()
        except asyncio.TimeoutError:
            await asyncio.sleep(2**i)
    raise
  2. 80% 成功率 Use a custom connector with adjusted timeouts 
    connector = aiohttp.TCPConnector(limit=10, force_close=True)
timeout = aiohttp.ClientTimeout(total=30, connect=10)
async with aiohttp.ClientSession(connector=connector, timeout=timeout) as session:

无效尝试

常见但无效的做法:

  1. Increasing timeout to a very high value 30% 失败

    This masks the underlying issue and may cause the application to hang indefinitely.

  2. Retrying immediately without backoff 60% 失败

    If the server is overloaded, immediate retries may worsen the situation and still timeout.