TraceId and the SpanId are Zeros

[vigamage]

I built a very simple Springboot REST API to test the metric collection and tracing. The metric collection is working fine, but I have issues with the tracing.

I am using the opentelemetry javaagent when starting the application.

java -javaagent:./opentelemetry-javaagent-1.22.0.jar \ -jar target/spring-tracing-0.0.1-SNAPSHOT.jar \ --spring.config.location=./src/main/resources/application.properties

When I call a endpoint exposed from the service, I get below printed in the console.

2023-05-25 19:15:58.201 INFO [spring-tracing,00000000000000000000000000000000,0000000000000000] 14527 --- [nio-9093-exec-2] c.e.demo.controller.GreetingsController : Hello 7777 2023-05-25 19:15:58.202 ERROR [spring-tracing,00000000000000000000000000000000,0000000000000000] 14527 --- [nio-9093-exec-2] c.e.demo.controller.GreetingsController : error log

As you can see, It prints zeros as the trace id and the span id.

I know this question is similar to one below. But I have made sure that spring uses opentelemetry sdk version 1.22.0 and i am using the java agent jar for the same version.(1.22.0)

#2435

How can I solve this issue.

Thanks

[trask]

hi @vigamage, are you following https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/docs/logger-mdc-instrumentation.md?

what happens if you print Span.current().getSpanContext().getTraceId() from inside of your code at that point where you are performing the logging?

[vigamage]

Actually I was following some other tutorials which talked about trace and span id only. The combination of them together with open telemetry java agent was not a point of discussion of any of them.

Now only I understand that the mdc should come into play here. After adding the MDC to the log lines, it started working. Thanks @trask

logging.pattern.level = trace_id=%mdc{trace_id} span_id=%mdc{span_id} trace_flags=%mdc{trace_flags} %5p

[banujan6]

@trask I get the same issue. When I print the TraceID using Span.current().getSpanContext().getTraceId(), I get 00000000000000000000000000000000.

In fact, I build the Span using the Context from the front-end application.

otelSpan = NeutrinoOTel.createSpanFromParent( ( ObjectNode )message.getOtelContext() );
otelScope = otelSpan.makeCurrent();
System.out.println(otelSpan.getSpanContext().getTraceId());

The message.getOtelContext() is giving the Context which is in the request.

{
   //... Other request data
    "otel-ctx": {
        traceparent: "00-f4cd9f124f94a8e029c0d5d72078759f-4a4eae6a3402fb14-01"
    }
}

[laurit]

@banujan6 it is best to create a new discussion for your issue not hijack an old discussion where the issue is completely different from yours. That being said the issue is most likely in your code. Try debugging NeutrinoOTel.createSpanFromParent, by stepping through the code you should be able narrow down why the context isn't extracted. If you need assistance then create a new github issue and include a minimal sample application that reproduces your issue and include all necessary instructions.

[banujan6]

This is noted. Thank you!