What version of Go are you using (go version)?

$ go version

1.11.4

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

darwin/amd64

$ go env

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"

What did you do?

I have a service(Service-B) which talks to another service(service-A) via GRPC. The GRPC server(service-A) is coded to return an error on every request. In the client, I have implemented a retry mechanism to retry calls to the server on every error max of 10 times. I am trying to print the logs of how many times the call was retried. I am doing this in my client(service-B).

func (s *server) Sum(ctx context.Context, req *gw.SumRequest) (*gw.SumResponse, error) {
	newTrace := trace.New("service-B", "main")
	newTrace.SetRecycler(func(args interface{}) {
		fmt.Println(args)
	})
	ctx = trace.NewContext(ctx, newTrace)
	defer newTrace.Finish()

	newEventLog := trace.NewEventLog("service-B", "main")
	defer newEventLog.Finish()

	sumResp, err := s.serviceAClient.Sum(
		ctx,
		&pbsa.SumRequest{
			A: req.A,
			B: req.B,
		},
	)
	if err != nil {
		currentTrace, _ := trace.FromContext(ctx)
		currentTrace.SetRecycler(func(args interface{}) {
			fmt.Println(args)
		})
		defer currentTrace.Finish()

		return nil, err
	}
}

What did you expect to see?

Some logs of how many times the calls were retried.

What did you see instead?

No logs. However, when I print the context(ctx) or the trace(currentTrace), I do see the trace in the log. I also saw an Events() method in both the Trace and EventLog files. But it is not in the interface, so I cannot make use of the method. I need some help as to how I can print the trace of the retries.