In concurrent scenarios, API calls to RPC may result in context cancel

[z406497819]

Describe the bug Here we used the example of API calling RPC in the greet demo, The implementation logic is very simple, it just outputs hello world At first, I thought it was a version issue. Go Zero upgraded from 1.6.0 to 1.6.5 and then to 1.7.0, but this problem still occurs The higher the concurrency, the greater the probability of occurrence At concurrency of 100, it is almost inevitable The only change made was sleeping for 5 seconds in the RPC layer

To Reproduce Steps to reproduce the behavior, if applicable:

1. The code is

rpc:

Name: car.rpc
ListenOn: 0.0.0.0:8081
Timeout: 60000

// logic
func (l *PingLogic) Ping(in *car.Req) (*car.Resp, error) {

	time.Sleep(time.Second*5)

	return &car.Resp{
		Pong: "hello",
	}, nil
}

api:

Name: car
Host: 0.0.0.0
Port: 8889
Timeout: 60000

CarRpc:
  Timeout: 60000
  Endpoints:
    - 192.168.1.3:8081

func (l *TestLogic) Test() (resp *types.Resp, err error) {

	res, err := l.svcCtx.CarRpc.Ping(l.ctx, &car.Req{})
	if err != nil {
		return
	}

	return &types.Resp{
		Name: res.Pong,
	}, nil
}

2. The error is

http response status:408 rpc error: code = Canceled desc = context canceled

**Screenshots**
![image](https://github.com/user-attachments/assets/30d73fc9-6e07-4555-bbc9-f4208f35d5d1)

**Environments (please complete the following information):**
- OS: linux
- go version 1.22.1
- go-zero version 1.7.0
- goctl version 1.7.0

Hope to solve this problem, thank you everyone

[z406497819]

Looking forward to resolving 🙏

[evgeniy-dammer]

I have this problem too

[NicoleRobin]

Is there a complete example code? I can't reproduce it according to the above description.

[kevwan]

context canceled means clients closed the requests. Typically, the scenario is the user closes the browser window before the server responds.

[github-actions[bot]]

This issue is stale because it has been open for 30 days with no activity.