lizining1231 commented on issue #3640:
URL: https://github.com/apache/dubbo-go/issues/3640#issuecomment-5245971865
我尝试构造了一份 最小复现测试 用于辅助该issue，它在当前场景下稳定报错
1. 测试的报错日志是：
```text
=== RUN TestRepro_RunHangsOnOccupiedTCP
repro_issue9_test.go:125: BUG REPRODUCED: Run did not return within 3s
after HTTP/2 failed to start (hung on errgroup.Wait)
--- FAIL: TestRepro_RunHangsOnOccupiedTCP (3.00s)
```
2. 测试的行为是：
测试拿到空闲 TCP 端口并验证同端口 UDP 空闲，然后占住 TCP 端口，用这个地址创建开启 HTTP/3 的 Server，在 goroutine
里调用 srv.Run 并把结果发到 channel。主 goroutine 用 select 等 3 秒：收到错误就打 t.Logf 日志，超时则打
t.Errorf 的 BUG REPRODUCED 日志
3. 测试的预期是：
如果 Run 在这 3 秒内返回了，带着 HTTP/2 的 bind 错误及时返回，测试通过。反之则FAIL，bug复现
4. 测试的原文件是：
[repro_issue3640_test.txt](https://github.com/user-attachments/files/30913881/repro_issue3640_test.txt)
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