How to make a trace propagate further?

[rushsky518]

Hi everyone, i have a question about Skywalking trace.
I marked a Netty Handler method with @Trace annotation, then it starts a span and finally ends at a biz method, but i expect the trace info continue to propagate, what should i do?

[pg-yang]

Where do you want to propagate ?
If you mean propagate trace info to downstream , Our plugin should cover most library .
In a word, It depends on what library you used for requesting external service , or your thread model .

[rushsky518]

Thanks a lot, i noticed that TraceCrossThread can handle trace info in multi-thread scenario. However we use projectrecator in the project.
Maybe i have to write a plugin.

[pg-yang]

Yes . the main reason is thread-cross between Handler and RPC framework that used for requesting downstream .
If you write plugin , you could reference https://skywalking.apache.org/docs/skywalking-java/latest/en/setup/service-agent/java-agent/java-plugin-development-guide/