# aiohttp客户端异常：连接池已满

- **ID:** `python/aiohttp-client-connection-pool`
- **领域:** python
- **类别:** network_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

并发请求过多，耗尽了aiohttp的连接池限制。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 3.7 | active | — | — |
| 3.8 | active | — | — |
| 3.9 | active | — | — |

## 解决方案

1. **** (95% 成功率)
   ```
   sem = asyncio.Semaphore(10); async with sem: await session.get(url)
   ```
2. **** (90% 成功率)
   ```
   conn = aiohttp.TCPConnector(limit=100); async with aiohttp.ClientSession(connector=conn) as session:
   ```

## 无效尝试

- **** — May still be insufficient and can lead to memory issues. (60% 失败率)
- **** — Creates many sessions, causing resource leaks and performance degradation. (70% 失败率)