Opentelemetry: reactive message incoming channel has no attributes

[turing85]

Describe the bug

Spans generated for a method annotated with @Incoming(...) @WithSpan(...) ... have on attributes.

Expected behavior

Spans have general attributes like code.namespace.

Actual behavior

Spans have no attributes.

How to Reproduce?

Reproducer:

1. Clone https://github.com/turing85/quarkus-opentelemetry, branch feature/switch-to-lgtm:

$ git clone --branch feature/switch-to-lgtm https://github.com/turing85/quarkus-opentelemetry.git \
  && cd quarkus-opentelemetry

2. Start lgtm and wait until lgtm is fully started, i.e. until the contaier logs show:

$ docker-compose --file local-deployment/docker-compose.yml up --detach &&
  docker logs -f quarkus-opentelemetry-lgtm-1
...
The OpenTelemetry collector and the Grafana LGTM stack are up and running. (created /tmp/ready)
Open ports:
 - 4317: OpenTelemetry GRPC endpoint
 - 4318: OpenTelemetry HTTP endpoint
 - 3000: Grafana. User: admin, password: admin

2.1. While you are waiting, take a look at class Receiver.java, which holds the relevant code:

...
@ApplicationScoped
@Log4j2
public class Receiver {
  @Incoming("numbers")
  @WithSpan("numbers-receive")
  public CompletionStage<Void> data(Message<Number> message) {
    // @formatter:off
    log.info(
        "received a {} message for {}",
        message
            .getMetadata(SubscribeMessageMetadata.class)
            .map(SubscribeMessageMetadata::subject)
            .orElse("<none>"),
        message.getPayload());
    // @formatter:on
    return message.ack();
  }
}

3. start the ping-service, wait for the service to be fully started:

$ ./mvnw --projects ping quarkus:dev

4. In another terminal, start the pong-service, wait for the service to be fully started:

$ ./mvnw --projects pong quarkus:dev

5. Generate some requests, cancel the script after a few runs with CRTL + C:

$ scripts/generate-load.sh

6. Look at the traces in Grafana. Grafana is reachable at http://localhost:3000

Output of uname -a or ver

Linux xxx 6.8.0-51-generic #52-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec 5 13:09:44 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Output of java -version

openjdk version "21.0.3" 2024-04-16 LTS 
OpenJDK Runtime Environment Temurin-21.0.3+9 (build 21.0.3+9-LTS) 
OpenJDK 64-Bit Server VM Temurin-21.0.3+9 (build 21.0.3+9-LTS, mixed mode, sharing)

Quarkus version or git rev

3.17.5

Build tool (ie. output of mvnw --version or gradlew --version)

Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937) 
Maven home: /home/marco/.m2/wrapper/dists/apache-maven-3.9.9/3477a4f1
Java version: 21.0.3, vendor: Eclipse Adoptium, runtime: /opt/java/mandrel/23.1.3.1-java21
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "6.8.0-51-generic", arch: "amd64", family: "unix"

Additional information

No response

[quarkus-bot]

/cc @Karm (mandrel), @brunobat (opentelemetry), @galderz (mandrel), @radcortez (opentelemetry), @zakkak (mandrel)