Whitelabel Error coming when trying to integrate @ManagementContextConfiguration in META-INF/spring.factories

问题

I am building Spring boot gradle application. I am trying to add an additional port for the actuator endpoint with Undertow.

Code: SecondActuatorPortConfiguration.java

package com.test.config;

import org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration;
import org.springframework.boot.actuate.autoconfigure.web.ManagementContextType;
import org.springframework.boot.web.embedded.undertow.UndertowBuilderCustomizer;
import org.springframework.context.annotation.Bean;

@ManagementContextConfiguration(ManagementContextType.CHILD)
public class SecondActuatorPortConfiguration {
    
    @Bean
    public UndertowBuilderCustomizer aa() {
        return (undertow) -> {
            // I need to expose 9090 (management.server.port=9090) 
            // and additional port, lets say - 9091
            undertow.addHttpListener(9091, "0.0.0.0");
        };
    }
}

src/main/respurces/META-INF/spring.factories :

org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration=\
com.test.config.SecondActuatorPortConfiguration

Hierarchy of files: Hierarchy of files

---

Till now, all the changes have been made as per this. But, if do netstat -tulpn | grep :9091 , then port is Listening but if I access this via http://127.0.0.1:9091/actuator, then Error: Whitelabel Error Page (type=Not Found, status=404) is coming

来源：https://stackoverflow.com/questions/62952159/whitelabel-error-coming-when-trying-to-integrate-managementcontextconfiguration