Span.fromContext(Context.current()).getSpanContext() return PropagatedSpan.INVALID

[cleverchuk]

After upgrading our embedded extensions to version 1.22.0 of the agent, the instrumentation broke and span is consistently invalid. Please, I need help figuring out why the api is returning PropagatedSpan.INVALID when called.
I'm a noob in this stuff so a lot things aren't obvious to me.

Additional Details:

• instrumented library: servlet 3
• Servlet container: Tomcat
• Span.fromContext(Context.current()).getSpanContext() return PropagatedSpan.INVALID

[laurit]

You could enable debug logging with -Dotel.javaagent.debug=true and see if there is anything suspicious. It would help if you could provide a minimal sample that reproduces your issue.

[cleverchuk]

I was able to solve the problem. By using similar configuration as is found here and ensuring that any dependency on OTEL is compileOnly. This ensures that bootstrap class loader and the agent class loader don't end up loading the same exact class. I also refactored the project so it uses same structure as the one linked.

I believe the root cause was the project was using the buildSrc approach to repackage the jar.