【NoClassDefFoundError】: org/apache/http/util/Args

在进行SpringCloud微服务建工搭建温习的时候，发现之前能正常的运行的服务提供者，报了java.lang.NoClassDefFoundError的错误

Caused by: java.lang.NoClassDefFoundError: org/apache/http/util/Args
	at org.apache.http.conn.scheme.Scheme.<init>(Scheme.java:92) ~[httpclient-4.5.3.jar:4.5.3]
	at com.netflix.discovery.shared.transport.jersey.EurekaJerseyClientImpl$EurekaJerseyClientBuilder$MyDefaultApacheHttpClient4Config.createDefaultSslCM(EurekaJerseyClientImpl.java:274) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.shared.transport.jersey.EurekaJerseyClientImpl$EurekaJerseyClientBuilder$MyDefaultApacheHttpClient4Config.<init>(EurekaJerseyClientImpl.java:187) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.shared.transport.jersey.EurekaJerseyClientImpl$EurekaJerseyClientBuilder.build(EurekaJerseyClientImpl.java:170) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.shared.transport.jersey.JerseyEurekaHttpClientFactory$JerseyEurekaHttpClientFactoryBuilder.buildLegacy(JerseyEurekaHttpClientFactory.java:197) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.shared.transport.jersey.JerseyEurekaHttpClientFactory$JerseyEurekaHttpClientFactoryBuilder.build(JerseyEurekaHttpClientFactory.java:178) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.shared.transport.jersey.JerseyEurekaHttpClientFactory.create(JerseyEurekaHttpClientFactory.java:135) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.shared.transport.jersey.Jersey1TransportClientFactories.newTransportClientFactory(Jersey1TransportClientFactories.java:48) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.DiscoveryClient.scheduleServerEndpointTask(DiscoveryClient.java:454) ~[eureka-client-1.6.2.jar:1.6.2]
	at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:392) ~[eureka-client-1.6.2.jar:1.6.2]
	... 45 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.http.util.Args
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_241]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_241]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_241]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_241]
	... 55 common frames omitted

进过一番搜索，发现大多数相同的报错的原因都是因为httpClient版本冲突，但检测了该模块的依赖，发现httpClient版本并不冲突。

后来发现我之前换过maven仓库，于是换回老的仓库，发现能正常运行。于是切换新的残酷之后，对maven仓库中\org\apache\httpcomponents\httpclient下的包删除重新下，返现项目正常启动了

总结

应该还是httpClient版本冲突问题，有冲突解决冲突，如果没有冲突，重新下载httpClient相关包