When service A calls service B using Feign or HttpClient, how can I obtain the server span id of service A in service B, instead of the client span id?

[wenton1993]

Because I want to print the parent span id in the business log. If it prints the client span id, it makes no sense.

[laurit]

If you want to obtain the server span for service A in service A then you can use https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/instrumenter/LocalRootSpan.java If you want to obtain the server span id of service A from service B then you will have to pass it along manually in baggage or wherever is convenient for you.