# 致命错误：所有goroutine都处于睡眠状态 - 死锁！（sync.Mutex锁顺序）

- **ID:** `go/goroutine-mutex-lock-deadlock`
- **领域:** go
- **类别:** runtime_error
- **验证级别:** ai_generated
- **修复率:** 80%

## 根因

两个或多个goroutine持有互斥锁并等待对方释放，形成循环依赖。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| 1.18 | active | — | — |
| 1.19 | active | — | — |
| 1.20 | active | — | — |
| 1.21 | active | — | — |
| 1.22 | active | — | — |

## 解决方案

1. **Always acquire locks in a consistent global order** (95% 成功率)
   ```
   // Lock mu1 then mu2; goroutine1: mu1.Lock(); mu2.Lock(); goroutine2: mu1.Lock(); mu2.Lock()
   ```
2. **Use try-lock pattern with channels** (80% 成功率)
   ```
   select { case <-mu: default: // avoid deadlock }
   ```

## 无效尝试

- **Using sync.RWMutex instead of Mutex** — Does not fix lock ordering issue. (90% 失败率)
- **Adding sleep to break deadlock** — Sleep does not resolve logical cycle. (95% 失败率)