错误：应用程序运行失败，试图实现服务发现Eureka

Question

我有一个非常简单的演示应用程序，我正在使用它向Eureka服务器注册。但我得到了下面的错误。我已经成功注册了另一个演示应用程序，但这一个失败了：

以下是错误消息：

12:29:07.678[restartedMain]DEBUGorg.springframework.boot.context.logging.ClasspathLoggingApplicationListener-应用程序无法使用类路径启动：[file：/User/test/下载/demorest/目标/类/] 12:29:07.728[background-preinit]DEBUGorg.jboss.logging-日志提供程序：org.jboss.logging.Log4j2LoggerProvider 12:29:07.729[background-preinit]INFOorg.hibernate.validator.internal.util.版本-HV000001： Hibernate Validator 6.0.14. Final 12:29:07.736[background-preinit]DEBUGorg.hibernate.validator.internal.engine.resolver.TraversableResolvers-无法找到javax.persistence.类路径上的持久性。假设非JPA 2环境。默认情况下所有属性都将是可遍历的。12:29:07.741[background-preinit]DEBUGorg.hibernate.validator.internal.xml.config.ValidationXmlParser-尝试为基于XML的Validator配置加载META-INF/validation.xml。12:29:07.743[background-preinit]DEBUGorg.hibernate.validator.internal.xml.config.ResourceLoaderHelper-尝试通过TCCL加载META-INF/validation.xml12:29:07.744[background-preinit]DEBUGorg.hibernate.validator.internal.xml.config.ResourceLoaderHelper-尝试通过Hibernate Validator的类加载器加载META-INF/validation.xml12:29:07.744[background-preinit]DEBUGorg.hibernate.validator.internal.xml.config.ValidationXmlParser-未找到META-INF/validation.xml。仅使用基于注释的配置。12:29:07.939[background-preinit]DEBUGorg.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator-通过原始TCCL加载表达式工厂12:29:07.944[background-preinit]DEBUGorg.hibernate.validator.internal.engine.ValidatorFactoryImpl-HV000234：使用org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator作为ValidatorFactory范围的消息插值器。12:29:07.944[background-preinit]DEBUGorg.hibernate.validator.internal.engine.Valid12:29:07.945[background-preinit]DEBUGorg.hibernate.validator.internal.engine.ValidatorFactoryImpl-HV000234：使用org.hibernate.validator.internal.engine.DefaultClockProvider作为ValidatorFactory范围的时钟提供程序。12:29:07.945[background-preinit]DEBUGorg.hibernate.validator.internal.engine.ValidatorFactoryImpl-HV000234：使用org.hibernate.validator.internal.engine.scripting.DefaultScriptEvalatorFactory作为ValidatorFactory范围的脚本评估器工厂。12:29:08.513[restartedMain]ERRORorg.springframework.boot.SpringApplication-应用程序运行失败java.lang.NoSuchMethodError：org.springframework.boot.builder.SpringApplicationBuilder。（[Ljava/lang/Object；）V atorg.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext（BootstrapApplicationListener.java:161）atorg.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent（BootstrapApplicationList. java： 102）at org. springframe. cloud. bootstrap. BootstrapApplicationListener. onDemorestApplication. main（DemorestApplication. java： 15）在sun. refect。NativeMethodAccessorInpl. ainke0（Native Method）在sun. Repect。NativeMethodAccessorInpl. invoke（NativeMethodAccessorInpl. java： 62）在sun. Repect。在java. lang. Repect委派MethodAccessorInpl. invoke（委派ingMethodAccessorInpl. java： 43）。在org. springframework. boot. devtools. restart. RestartLauncher. run（RestartLauncher. java： 49）

同样的项目可以在没有尤里卡的情况下开始。

   <?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>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.2.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.example.rest</groupId>
<artifactId>demorest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demorest</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>1.8</java.version>
</properties>

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


    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        <version>1.4.6.RELEASE</version>
    </dependency>


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

    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>

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

</dependencies>

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

应用属性：

    spring.application.name=demorest
    eureka.client.service-url.defaultZone=http://localhost:8761/eureka

应用程序类别：

@EnableDiscoveryClient
@SpringBootApplication
public class DemorestApplication {

public static void main(String[] args) {
    ApplicationContext ctx = SpringApplication.run(DemorestApplication.class, args);

    String[] beanNames = ctx.getBeanDefinitionNames();
    //Arrays.sort(beanNames);

    for(String name : beanNames)
        System.out.println(name);
}

}

Answer 1

除了Ben G给出的答案之外，Spring Cloud和Spring Boot应该有兼容的版本，可以在表1中找到。发布训练Spring Boot兼容性。

例如：Spring Boot 2.6.1和Spring Cloud 2021.0.0可以一起使用，如下所示：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.6.1</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>2021.0.0</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>