出现协程死锁

### Describe Your Environment (描述你的环境)

- System: 
- PHP version:  7.4
- Mysql version:  8.0
- Swoole version:  4.8.5
- SMProxy version: latest

### 错误内容

**[FATAL ERROR]: all coroutines (count: 2) are asleep - deadlock!** 

### How to Reproduce the Problem? (如何重现问题)

1. 在并发的大查询场景下
