Failed to introspect Class [org...DiscoveryClientOptionalArgsConfiguration from ClassLoader ...

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我是靠谱客的博主受伤小甜瓜，最近开发中收集的这篇文章主要介绍Failed to introspect Class [org...DiscoveryClientOptionalArgsConfiguration from ClassLoader ...，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

在启动zuul工程时候报的问题

报错原文：


java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.netflix.eureka.config.DiscoveryClientOptionalArgsConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:358) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:414) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.lambda$getTypeForFactoryMethod$2(AbstractAutowireCapableBeanFactory.java:743) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1688) ~[na:1.8.0_251]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:742) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:681) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:649) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1608) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:524) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:495) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:617) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:609) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1243) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:880) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:868) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:855) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:806) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:325) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
	at com.yss.ZuulServerApplication.main(ZuulServerApplication.java:14) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: com/netflix/discovery/AbstractDiscoveryClientOptionalArgs
	at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_251]
	at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[na:1.8.0_251]
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_251]
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) ~[na:1.8.0_251]
	at java.net.URLClassLoader.access$100(URLClassLoader.java:74) ~[na:1.8.0_251]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:369) ~[na:1.8.0_251]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:363) ~[na:1.8.0_251]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_251]
	at java.net.URLClassLoader.findClass(URLClassLoader.java:362) ~[na:1.8.0_251]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_251]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_251]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_251]
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_251]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_251]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_251]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.netflix.discovery.AbstractDiscoveryClientOptionalArgs
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_251]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_251]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_251]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_251]
	... 37 common frames omitted


Process finished with exit code 1

解决方案：
工程pom.xml中找到：

		 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-eureka-client</artifactId>
        </dependency>

这个依赖，改成下面的依赖：

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