Seeing HTTP POST as first span instead of the actual method being called

[zubaiersayed]

Describe the bug

When a request is made to an endpoint the first span is {GET/POST/PUT ETC} instead of the actual method being being called by the endoint.

For example when I make a request to /report I expect the first span to be ReportController.generateReport, and not HTTP POST. I use @WithSpan annotations on my endpoint methods.

I using Micronaut with Netty, and run the opentelemetry agent like this:

exec su-exec "$USER:$GROUP" "$JAVA_HOME/bin/java" \
      -javaagent:/home/appuser/opentelemetry-javaagent.jar \
      -Dotel.exporter.otlp.endpoint="$APM_SERVER_URL" \
      -Dotel.exporter.otlp.headers="Authorization=Bearer $APM_SECRET_TOKEN" \
      -Dotel.resource.attributes="service.name=$APM_SERVICE_NAME,deployment.environment=$APM_ENVIRONMENT" \
      -Dotel.instrumentation.kotlinx-coroutines.enabled=true \
      -Dmicronaut.environments=ec2,cloud \
      -Dlogback.configurationFile=logback-cloud.xml \
      -XX:MaxRAMPercentage=80 \
      -jar "$APP_JAR"

Example in the picture below.

Steps to reproduce

Example above.

Expected behavior

Expect the first span to be the actual method running inside the application.

Actual behavior

I see POST, GET etc as the first span

Javaagent or library instrumentation version

2.13.1

Environment

JDK:
OS:

Additional context

No response

[zubaiersayed]

@trask any insight?

[trask]

we don't have any Micronaut instrumentation that sets the http.route (and nice span name)

you could try https://micronaut-projects.github.io/micronaut-tracing/latest/guide/#opentelemetry