[Broken] CROSS_PROCESS

[Struggleee]

我在追蹤grpc service，
當我沒加sleep時會出現 [Broken] CROSS_PROCESS

func sendRequest(client hello.HelloClient) {
	ctx := context.Background()
	exSpan, err := tracer.CreateExitSpan(ctx, "grpc-server", "grpc-server-domain:5051", func(headerKey, headerValue string) error {
		ctx = metadata.AppendToOutgoingContext(ctx, headerKey, headerValue)
		return nil
	})
	if err != nil {
		log.Fatalln(err)
	}
	exSpan.SetComponent(23)
	exSpan.SetSpanLayer(2)
	req := &hello.HelloRequest{
		Value: "test",
	}
	res, err := client.Hello(ctx, req)
	if err != nil {
		log.Fatalln(err)
	}
	exSpan.End()
	log.Println(res.Value)
}

當我加sleep 200ms 在 span.End()之後時，就正常運作。

func sendRequest(client hello.HelloClient) {
	fmt.Println("Starting to do a RPC")
	ctx := context.Background()
	exSpan, err := tracer.CreateExitSpan(ctx, "grpc-server", "grpc-server-domain:5051", func(headerKey, headerValue string) error {
		ctx = metadata.AppendToOutgoingContext(ctx, headerKey, headerValue)
		return nil
	})
	if err != nil {
		log.Fatalln(err)
	}
	exSpan.SetComponent(23)
	exSpan.SetSpanLayer(2)
	req := &hello.HelloRequest{
		Value: "test",
	}
	res, err := client.Hello(ctx, req)
	if err != nil {
		log.Fatalln(err)
	}
	exSpan.End()
        time.Sleep(200 * time.Millisecond)
	log.Println(res.Value)
}

請問這是我寫法有問題嗎？
謝謝。

[wu-sheng]

Please use English on GitHub. go2sky relies on your codes(go's context) to propagate the tracing context. And you should make sure all spans are closed properly.

The ASF upstream doc provides explanation about what is VNode, https://skywalking.apache.org/docs/main/latest/en/faq/vnode/#what-is-vnode