[OpenTelemetry] http.route server span attribute set to "/"

[PhilippParis]

Describe the bug

when defining the JAX-RS annotations in an interface (e.g. generated by the openapi-generator) the OpenTelemetry server span attribute http.route
is set to "/" instead of the actual route.

the issue is also mentioned here: #27827 (comment)

http.route is used in some tools (e.g. graphana) to display the trace name.
Due to the bug, all traces have the same name: e.g "POST /"

Expected behavior

http.route set to "/path/to/resource"

Server Span Attributes:

client.address:  "127.0.0.1" 
code.function: "endpoint"  
code.namespace: "com.example.com.Resource" 
http.request.body.size: 0   
http.request.method:  "POST"  
http.response.status_code: 204   
http.route: "/path/to/resource"   
server.address: "localhost"  
server.port: 8080 
url.path: "/example/api/v1/path/to/resource"   
url.scheme: "http" 
user_agent.original: "bruno-runtime/1.34.0"

Actual behavior

http.route set to "/"

Server Span Attributes:

client.address:  "127.0.0.1" 
code.function: "endpoint"  
code.namespace: "com.example.com.Resource" 
http.request.body.size: 0   
http.request.method:  "POST"  
http.response.status_code: 204   
http.route: "/"   
server.address: "localhost"  
server.port: 8080 
url.path: "/example/api/v1/path/to/resource"   
url.scheme: "http" 
user_agent.original: "bruno-runtime/1.34.0"

How to Reproduce?

public interface ResourceInterface {
    @POST
    Response endpoint();
}


@Path("/path/to/resource")
@ApplicationScoped
public class Resource implements ResourceInterface {

    public Response endpoint() {
        return Response.noContent().build();
    }
}

Output of uname -a or ver

No response

Output of java -version

openjdk 21.0.3

Quarkus version or git rev

3.17.7

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

Apache Maven 3.9.8

Additional information

No response

[quarkus-bot]

/cc @brunobat (opentelemetry), @radcortez (opentelemetry)

[gsmet]

Could you please provide a simple reproducer in the form of a Maven project? Thanks!

[brunobat]

It's a bit strange to split JAX-RS annotations between interface and implementation. In theory it's possible but it looks wrong.
Can you please try:

public interface ResourceInterface {
    @POST
    @Path("/path/to/resource")
    Response endpoint();
}

[PhilippParis]

here is a reproducer project: https://github.com/PhilippParis/otel-issue-reproducer

issue can be reproduced by executing "curl localhost:8080/api/v1/hello"
and checking the traces in the graphana dev service

in setting up the reproducer i discovered that the issue is only present when using the resteasy dependencies.
when using "quarkus-rest-jackson" or "quarkus-rest" it works as expected!

so i guess should really migrate my projects to quarkus-rest!
if you are not planning to fix that in the old resteasy dependencies, feel free to close the issue.

thanks for your quick feedback!

[geoand]

so i guess should really migrate my projects to quarkus-rest!

That should probably be done regardless of this issue (which we should fix in any case) :)