Combining metrics annotations leads to exception

[schoeffm]

Description

---

Annotating a managed bean with more than one metrics annotation (i.e. @Metered and @Timed) causes a ClassCastException.

Expected Outcome

My expectation was to have both types registered - one metrics-measurement for each annotation.

Current Outcome

Well, when calling the annotated bean this leads to a ClassCastException.

Steps to reproduce (Only for bug reports)

Take the attached archive - unpack it - build and start it using:

mvn clean install && docker-compose build && docker-compose up -d

After the app was started, hit the defined endpoint:

curl http://localhost:8080/metricstest/api/ping
[metricstest.zip](https://github.com/payara/Payara/files/2231701/metricstest.zip)

Samples

import org.eclipse.microprofile.metrics.annotation.Metered;
import org.eclipse.microprofile.metrics.annotation.Timed;

import javax.enterprise.context.ApplicationScoped;
import javax.ws.rs.GET;
import javax.ws.rs.Path;

@ApplicationScoped
@Path("ping")
public class PingResource {

    @GET
    @Metered
    @Timed
    public String ping() {
        return "Hello World";
    }
}

Context (Optional)

What I wanted to accomplish is to measure different aspects of a method execution - thus I've placed two types of metrics-annotations on top of a REST-Resource to get

1. it's execution time
2. the number of calls during app-runtim

Environment

• Payara Version: 5.182, 4.181
• Edition: Micro
• JDK Version: 8 u152 - OpenJDK
• Operating System: Linux / Mac
• Database: no DB involved

[jGauravGupta]

Issue already fixed in master PR #2886