Eureka Server 在 Spring Boot 中启动时出现错误
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【中文标题】Eureka Server 在 Spring Boot 中启动时出现错误【英文标题】：Eureka Server while starting in spring boot getting the errors 【发布时间】：2020-02-27 04:20:35 【问题描述】：启动 Eureka Server 时无法开始获取错误
尝试更改云版本更改版本
<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 https://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>2.2.0.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>eurekaserver</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>eurekaserver</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
</properties>
依赖部分
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<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-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.retry</groupId>
<artifactId>spring-retry</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.RC1</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
构建部分
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/mileston</url>
</repository>
</repositories>
</project>
日志：
2019-11-01 00:05:18.833 INFO 7544 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$3b9dbe3e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.0.RELEASE)
2019-11-01 00:05:19.455 INFO 7544 --- [ main] c.e.e.EurekaserverApplication : No active profile set, falling back to default profiles: default
2019-11-01 00:05:20.771 WARN 7544 --- [main] o.s.boot.actuate.endpoint.EndpointId：端点 ID 'service-registry' 包含无效字符，请迁移到有效格式。 2019-11-01 00:05:21.119 INFO 7544 --- [main] os.cloud.context.scope.GenericScope：BeanFactory id=9f8a0e73-0f18-37e3-a449-5d163b119105 2019-11-01 00:05:21.158 错误 7544 --- [main] os.boot.SpringApplication：应用程序运行失败 java.lang.NoClassDefFoundError: org/apache/commons/lang/text/StrLookup 在 java.base/java.lang.Class.getDeclaredConstructors0(Native Method) ~[na:na] 在 java.base/java.lang.Class.privateGetDeclaredConstructors(Class.java:3137) ~[na:na] 在 java.base/java.lang.Class.getDeclaredConstructors(Class.java:2357) ~[na:na] 在 org.springframework.boot.context.properties.ConfigurationPropertiesBean$BindMethod.findBindConstructor(ConfigurationPropertiesBean.java:318) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.context.properties.ConfigurationPropertiesBean$BindMethod.forClass(ConfigurationPropertiesBean.java:300) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.validate(ConfigurationPropertiesBeanDefinitionValidator.java:57) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.postProcessBeanFactory(ConfigurationPropertiesBeanDefinitionValidator.java:45) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:286) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] 在 org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:174) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] 在 org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] 在 org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] 在 org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] 在 com.example.eurekaserver.EurekaserverApplication.main(EurekaserverApplication.java:12) ~[classes/:na] 引起：java.lang.ClassNotFoundException：org.apache.commons.lang.text.StrLookup 在 java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na] 在 java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na] 在 java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na] ...省略了18个常用框架
【问题讨论】：
运行 mvn clean install 并再次测试。 在 mvn clean install 后仍然出现同样的错误 然后检查那个appache类是否出现在你的类路径中。 【参考方案1】：这段代码可能对你有帮助，我在我的 pom 文件中使用了代码，你也可以像这样查看和修复你的代码。
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.sencerseven.microservices</groupId>
<artifactId>netflix-eureka-naming-server</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>netflix-eureka-naming-server</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Greenwich.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>$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>
而且你必须把@EnableEurekaServer注解放到mainclass上
【讨论】：
仍然出现同样的错误原因：java.lang.ClassNotFoundException: org.apache.commons.lang.text.StrLookup at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8 .0_221] at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_221] at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_221] at java.lang。 ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_221] ...省略了18个常用框架以上是关于Eureka Server 在 Spring Boot 中启动时出现错误的主要内容，如果未能解决你的问题，请参考以下文章
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