#EnableEurekaServer, #EnableConfigServer, #EnableAdminServer and #EnableZuulProxy walk into a bar - spring-boot

Question

I am having trouble building a Spring Boot + Spring Cloud application that is combining Zuul, Eureka server, Config server and Admin server in one unique application.
If you are already thinking: "Why on earth, this is breaking micro services concepts, etc.." I totally agree. This question is about the feasibility to make it happen, not to ask if it is a good idea to do it, thank you for your understanding.
Does anyone know how to make it happen? Some solution with Spring 2.1.0 + Spring Cloud Finchley or above will be great.
The code is obviously very straightforward:
`
#EnableZuulProxy
#EnableAdminServer
#EnableConfigServer
#EnableEurekaServer
#SpringBootApplication
public class Main {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
}
`
The pom is also simple:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Greenwich.M3</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-server-ui</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
</dependencies>
With an also straightforward config file:
spring.application.name=question
server.port=8090
eureka.client.service-url.defaultZone=http://localhost:8090/eureka
spring.boot.admin.context-path=/admin
spring.cloud.config.server.prefix=/config
spring.cloud.config.server.git.uri=...
spring.cloud.config.server.git.searchPaths=...
[...]
The closest I got was to use 2.0.6 + Finchley:
2018-12-08 13:20:10.515 INFO 13078 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2018-12-08 13:20:10.519 WARN 13078 --- [ost-startStop-1] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [RxIoScheduler-1 (Evictor)] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)
2018-12-08 13:20:10.534 INFO 13078 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-12-08 13:20:10.536 ERROR 13078 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
An attempt was made to call the method reactor.retry.Retry.retryMax(J)Lreactor/retry/Retry; but it does not exist. Its class, reactor.retry.Retry, is available from the following locations:
jar:file:/Users/aaa/.m2/repository/io/projectreactor/addons/reactor-extra/3.1.7.RELEASE/reactor-extra-3.1.7.RELEASE.jar!/reactor/retry/Retry.class
It was loaded from the following location:
file:/Users/aaa/.m2/repository/io/projectreactor/addons/reactor-extra/3.1.7.RELEASE/reactor-extra-3.1.7.RELEASE.jar
Action:
Correct the classpath of your application so that it contains a single, compatible version of reactor.retry.Retry
Process finished with exit code 1

Answer 1

You need version 2.0.4 of spring boot admin. You're using the latest (2.1.1) which is not compatible with the rest of Spring libraries you're using.