The difference between entrySpan and LocalSpan

[willardwang]

Hello, I have a problem. When I create a logical endpoint using localSpan, I find that it does not display trace. If I use entrySpan, it will display trace.

[wu-sheng]

logical span is for statistics, not for trace query. They are irrelevant.

[willardwang]

I would like to ask if a Spring MVC request will invoke many service methods, and I want to intercept each service method and create an entry span. Is this allowed?

[wu-sheng]

EntrySpan EntrySpan represents a service provider, which is also the endpoint on the server end. As an APM system, SkyWalking targets the application servers. Therefore, almost all the services and MQ-consumers are EntrySpans.

Ref https://skywalking.apache.org/docs/main/next/en/api/trace-data-protocol-v3/#trace-data-protocol

You could search and find the definition easily.

[willardwang]

Okay, I've got a BUG, and I don't know if it's a BUG, but look at this again
Click on the endpoint to see his statistics display empty
Refer to the first picture

This problem occurs when I click on this endpoint

The endpoint of the selector is blank

[wu-sheng]

We didn't test Chinese text. There may be an encoding issue. Upstream always considers English text only.

[willardwang]

English this will also fail

It will be the same

I found that it has nothing to do with Chinese, when I click on this endpoint to jump to the page, the page will make a request to get all the logical endpoints

{"query":"query queryEndpoints($serviceId: ID!, $keyword: String!) {\n  pods: findEndpoint(serviceId: $serviceId, keyword: $keyword, limit: 20) {\n    id\n    value: name\n     label: name\n    }\n}","variables":{"serviceId":"YXdzNzpsaXVmYXRhb0FXUzctMzFBNw==.1","duration":{"start":"2023-08-01 0858","end":"2023-08-01 0928","step":"MINUTE"},"keyword":""}}

It can be found that the keyword is empty, which causes the problem of picture 2 ，

A steady recurrence of this problem is to have more than 20 endpoints, then search for endpoints that are not displayed on the current endpoint page and click，The endpoint selector's page component appears empty，As shown in picture 3

[willardwang]

[wu-sheng]

Search and jump of endpoint works on the official demo env, demo.skywalking.a.o.

I can't be sure about your case.

[wu-sheng]

Are you using Safari?