How to activate JMX monitoring in spring boot standalone app

Question

I went via almost all docs and all but not able to get grip on this mysterious stuff. so my question - Can I use my standalone spring boot app to monitor health and other metrics of my app via http jmx url? Do I need to configure something else for this? I have added below dependency in boot app.

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.jolokia</groupId>
        <artifactId>jolokia-core</artifactId>
    </dependency>

I have also configured below properties in my config file.

management.endpoints.web.exposure.include=*
management.endpoints.jmx.unique-names=true
management.server.port=8080
management.server.ssl.enabled=false

When I try to hit URL : http://localhost:8080/actuator/jolokia/health I am not able to see any results.

Also tried adding custom end point like below but not working.

@Endpoint(id="mypoint")
    @Component
    public class myPointEndPoint {
        @ReadOperation
        public String mypoint(){
            return "Hello" ;
        }

with additional property
management.endpoint.mypoint.enabled=true

Answer 1

The problem is the url you are trying to invoke. First, retrieve the possible mbeans with: http://localhost:8080/actuator/jolokia/list

When you take a look at the Health mbean, you must provide the unique name and the operation (op).

In my case, it looked like: http://localhost:8080/actuator/jolokia/exec/org.springframework.boot:type=Endpoint,name=Health,identity=4200098/health

Also check the Jolokia documentation: https://jolokia.org/reference/html/index.html