Spring Cloud Service регистрируется на Discovery Server, но затем отменяет регистрацию и останавливается

Question

В двух словах объяснение:
Сборка очень простого сервера Eureka Discovery с весенней загрузкой 2.0.4. Также создан базовый сервис Eureka, который использует Eureka Discovery. Запустите сервер обнаружения, а затем запустите службу. Служба регистрируется на сервере обнаружения, но затем сразу же незарегистрируется и останавливается.

Подробности Код сервера обнаружения:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@SpringBootApplication
@EnableEurekaServer
public class DiscoveryServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(DiscoveryServerApplication.class, args);
}
}

Служба: обратите внимание, для этого примера я помещаю контроллер в основное загрузочное приложение.

@EnableDiscoveryClient  //Want it to registger with the discovery 
@SpringBootApplication
@RestController  //Obviously not a best practice just an example
public class ServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(ServiceApplication.class, args);
    }

    @Value("${spring.application.name")
    private String instance;

    @RequestMapping("/")
    public String message() {
        return "hello from " + instance;
    }

}

Сервис pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.skjenco</groupId>
    <artifactId>service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>service</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.4.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

Проблема: Служба будет зарегистрирована, но затем не зарегистрирована.

2018-09-07 22:18:23.918  INFO 9660 --- [  restartedMain] com.netflix.discovery.DiscoveryClient    : Getting all instance registry info from the eureka server
2018-09-07 22:18:24.011  INFO 9660 --- [  restartedMain] com.netflix.discovery.DiscoveryClient    : The response status is 200
2018-09-07 22:18:24.014  INFO 9660 --- [  restartedMain] com.netflix.discovery.DiscoveryClient    : Starting heartbeat executor: renew interval is: 30
2018-09-07 22:18:24.016  INFO 9660 --- [  restartedMain] c.n.discovery.InstanceInfoReplicator     : InstanceInfoReplicator onDemand update allowed rate per min is 4
2018-09-07 22:18:24.019  INFO 9660 --- [  restartedMain] com.netflix.discovery.DiscoveryClient    : Discovery Client initialized at timestamp 1536380304018 with initial instances count: 0
2018-09-07 22:18:24.022  INFO 9660 --- [  restartedMain] o.s.c.n.e.s.EurekaServiceRegistry        : Registering application service with eureka with status UP
2018-09-07 22:18:24.023  INFO 9660 --- [  restartedMain] com.netflix.discovery.DiscoveryClient    : Saw local status change event StatusChangeEvent [timestamp=1536380304023, current=UP, previous=STARTING]
2018-09-07 22:18:24.025  INFO 9660 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_SERVICE/325L:service:8081: registering service...
2018-09-07 22:18:24.041  INFO 9660 --- [  restartedMain] com.skjenco.service.ServiceApplication   : Started ServiceApplication in 4.053 seconds (JVM running for 4.947)
2018-09-07 22:18:24.046  INFO 9660 --- [      Thread-19] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@7fb5981d: startup date [Fri Sep 07 22:18:21 MDT 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@47583a40
2018-09-07 22:18:24.047  INFO 9660 --- [      Thread-19] o.s.c.n.e.s.EurekaServiceRegistry        : Unregistering application service with eureka with status DOWN
2018-09-07 22:18:24.047  WARN 9660 --- [      Thread-19] com.netflix.discovery.DiscoveryClient    : Saw local status change event StatusChangeEvent [timestamp=1536380304047, current=DOWN, previous=UP]
2018-09-07 22:18:24.049  INFO 9660 --- [      Thread-19] o.s.c.support.DefaultLifecycleProcessor  : Stopping beans in phase 0
2018-09-07 22:18:24.051  INFO 9660 --- [      Thread-19] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
2018-09-07 22:18:24.052  INFO 9660 --- [      Thread-19] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans
2018-09-07 22:18:24.053  INFO 9660 --- [      Thread-19] com.netflix.discovery.DiscoveryClient    : Shutting down DiscoveryClient ...
2018-09-07 22:18:24.055  WARN 9660 --- [      Thread-19] .s.c.a.CommonAnnotationBeanPostProcessor : Invocation of destroy method failed on bean with name 'scopedTarget.eurekaClient': org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'eurekaInstanceConfigBean': Singleton bean creation not allowed while singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!)

При отладке вы можете увидеть ошибку при создании компонента конфигурации.

org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name 'eurekaInstanceConfigBean': Singleton bean creation not allowed while singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:208) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:251) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1135) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1062) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:818) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolvePreparedArguments(ConstructorResolver.java:767) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:410) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1247) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1096) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:535) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:495) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$1(AbstractBeanFactory.java:353) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:390) [spring-cloud-context-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:184) [spring-cloud-context-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:350) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:672) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at com.netflix.appinfo.ApplicationInfoManager$$EnhancerBySpringCGLIB$$9150922a.unregisterStatusChangeListener(<generated>) ~[eureka-client-1.9.3.jar:1.9.3]
at com.netflix.discovery.DiscoveryClient.shutdown(DiscoveryClient.java:891) ~[eureka-client-1.9.3.jar:1.9.3]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_111]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_111]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_111]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeDestroyMethods(InitDestroyAnnotationBeanPostProcessor.java:324) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeDestruction(InitDestroyAnnotationBeanPostProcessor.java:156) ~[spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:240) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DisposableBeanAdapter.run(DisposableBeanAdapter.java:233) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.destroy(GenericScope.java:404) [spring-cloud-context-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.cloud.context.scope.GenericScope.destroy(GenericScope.java:139) [spring-cloud-context-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:256) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:571) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:543) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:954) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:504) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:961) [spring-beans-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1041) [spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1017) [spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext$1.run(AbstractApplicationContext.java:937) [spring-context-5.0.8.RELEASE.jar:5.0.8.RELEASE]

Мой обходной путь - не использовать последний загрузочный инициализатор Spring. Вместо этого я использую 1.5.15.

Я хотел бы использовать Spring Boot 2 ^ с Spring Cloud.

Answer 1

Уведомление в строке журнала:

2018-09-07 22:18:24.046  INFO 9660 --- [      Thread-19] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@7fb5981d: startup date [Fri Sep 07 22:18:21 MDT 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@47583a40

Ваше приложение останавливается сразу после его запуска, и это не относится к Discovery Client. Журналы ошибок внизу - это просто ошибки при остановке клиента обнаружения, вызванные остановкой приложения.

Основной причиной этой проблемы является то, что ваше приложение не является веб-приложением, поскольку в нем нет встроенного Tomcat . Это привело к отсутствию загрузочного веб-ресурса Spring на его пути к классам.

Разрешение: добавьте веб-зависимость загрузки Spring на ваш pom.xml файл:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

Ура!