Helidon SE: Active span is returning null from GlobalTracer for inbound requests

[midhunnkj]

Environment Details

• Helidon Version:2.5.1
• Helidon SE
• JDK version: java version "17.0.3.1"
• OS: Mac OS Monterey 12.2.1
• Docker version (if applicable):

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Problem Description

In Helidon SE application when intercepting inbound requests, activeSpan is returning null from GlobalTracer //: # "State if the problem is easily reproducible or happens intermittently" easily reproducible //: # "Include stack traces or command outputs"

Steps to reproduce

1.Create a sample Helidon SE application 2.Intercept any inbound request 3. GlobalTracer.get().scopeManager().activeSpan(); is returning null //: # "Provide sample code/application if relevant"

GlobalTracer.get().scopeManager().activeSpan();

[spericas]

@midhunnkj What dependencies do you have in your pom? Have you included Jaeger or Zipkin?

[tomas-langer]

Hello, active span cannot be obtained from tracer, because it is reactive and may use multiple threads within a single request. To obtain the current span context, please use

io.helidon.common.context.Contexts.context()
        .flatMap(it -> it.get(SpanContext.class))
        .orElse(null);

or

serverRequest.context().get(SpanContext.class)

to obtain it. This can be used to create additional spans as children of it.