Disconnected from the target VM, address: '127.0.0.1:51233', transport: 'socket'
Eureka Client的使用
使用IDEA创建一个Spring Initializr项目，在勾选模块的时候需要选择Eureka Discovery，如下:
项目生成的pom.xml文件内容如下：
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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< modelVersion>4.0.0</modelVersion>
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< groupId>org.zero.eureka</groupId>
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< artifactId>client</artifactId>
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< version>0.0.1-SNAPSHOT</version>
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< packaging>jar</packaging>
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< name>client</name>
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<description>Demo project for Spring Boot </description>
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< parent>
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< groupId>org.springframework.boot</groupId>
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< artifactId>spring-boot-starter-parent</artifactId>
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< version>2.0.4.RELEASE</version>
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< relativePath/> <!-- lookup parent from repository -->
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</ parent>
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< properties>
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< project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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< project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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< java.version>1.8</java.version>
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< spring-cloud.version>Finchley.SR1</spring-cloud.version>
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</ properties>
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< dependencies>
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< dependency>
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< groupId>org.springframework.cloud</groupId>
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< artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
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</ dependency>
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< dependency>
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< groupId>org.springframework.boot</groupId>
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< artifactId>spring-boot-starter-test</artifactId>
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< scope>test</scope>
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</ dependency>
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</ dependencies>
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< dependencyManagement>
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< dependencies>
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< dependency>
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< groupId>org.springframework.cloud</groupId>
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< artifactId>spring-cloud-dependencies</artifactId>
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< version>${spring-cloud.version}</version>
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<type>pom</type>
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< scope>import</scope>
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</ dependency>
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</ dependencies>
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</ dependencyManagement>
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< build>
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< plugins>
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< plugin>
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< groupId>org.springframework.boot</groupId>
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< artifactId>spring-boot-maven-plugin</artifactId>
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</ plugin>
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</ plugins>
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</ build>
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</project>
项目的依赖都加载完成后，在启动类中加上@EnableDiscoveryClient，声明这是一个eureka client，否则不会进行服务注册：
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package org.zero.eureka.client;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
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public class ClientApplication {
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public static void main(String[] args) {
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SpringApplication.run(ClientApplication.class, args);
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}
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}
接着就是在application.yml配置文件中，配置注册中心即eureka server的地址，以及项目的名称和启动端口号。如下：
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eureka:
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client:
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service-url:
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defaultZone: http: //localhost:8761/eureka/
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spring:
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application:
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name: eureka-client
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server:
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port: 9088
完成以上配置后，即可启动项目。但是我这里启动项目的时候失败了，控制台输出如下警告信息：
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!)
这是因为client里不包含Tomcat的依赖，所以Spring容器无法创建一些实例，从而导致项目无法启动，只需在pom.xml文件中，加上web依赖即可：
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<dependency>
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< groupId>org.springframework.boot</groupId>
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< artifactId>spring-boot-starter-web</artifactId>
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</dependency>
项目启动成功后，可以在eureka server的信息面板中查看到已注册的实例信息，如下：