NoClassDefFoundError：Spring CloudのNameCoder Brixton.SR7とSpring Cloud Camden.SR3

Question

CamdenのすべてのリリースでBrixton.SR7も同様に、Springブートアプリケーションの起動時にEureka Clientに関する次の問題が発生します。

私は @EnableDiscoveryClient注釈を持つ春のブートアプリを持っている。例えば

java.lang.NoClassDefFoundError: com/thoughtworks/xstream/io/naming/NameCoder

...

最近、私は春の雲を変えてきた。この取り除くためにBrixton.SR6に戻っ依存関係エラー。確かに、Spring Cloudの最新バージョンを使用したいのですが、どうすればこのエラーを正しい方法で修正できますか？ ` http://maven.apache.org/xsd/maven-4.0.0：ここ

2016-11-30 13:09:50.166 INFO 9248 --- [   main] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled. 
2016-11-30 13:09:50.177 ERROR 9248 --- [   main] o.s.boot.SpringApplication    : Application startup failed 

org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.cloud.netflix.eureka.EurekaDiscoveryClientConfiguration'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.eurekaClient' defined in class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.RuntimeException: Failed to initialize DiscoveryClient! 
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:176) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:51) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:346) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:149) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:112) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:879) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144) ~[spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.2.RELEASE.jar:1.4.2.RELEASE] 
    at com.citifintech.ReferenceZipkinServiceApplication.main(ReferenceZipkinServiceApplication.java:15) [classes/:na] 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.eurekaClient' defined in class path resource [org/springframework/cloud/netflix/eureka/EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.RuntimeException: Failed to initialize DiscoveryClient! 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1128) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1022) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:512) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory$2.getObject(AbstractBeanFactory.java:345) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:359) ~[spring-cloud-context-1.1.6.RELEASE.jar:1.1.6.RELEASE] 
    at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:176) ~[spring-cloud-context-1.1.6.RELEASE.jar:1.1.6.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:340) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:192) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at com.sun.proxy.$Proxy82.getApplications(Unknown Source) ~[na:na] 
    at org.springframework.cloud.netflix.eureka.EurekaDiscoveryClientConfiguration.maybeInitializeClient(EurekaDiscoveryClientConfiguration.java:120) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at org.springframework.cloud.netflix.eureka.EurekaDiscoveryClientConfiguration.start(EurekaDiscoveryClientConfiguration.java:97) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:173) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    ... 14 common frames omitted 
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.netflix.discovery.EurekaClient]: Factory method 'eurekaClient' threw exception; nested exception is java.lang.RuntimeException: Failed to initialize DiscoveryClient! 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    ... 29 common frames omitted 
Caused by: java.lang.RuntimeException: Failed to initialize DiscoveryClient! 
    at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:441) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:304) ~[eureka-client-1.4.12.jar:1.4.12] 
    at org.springframework.cloud.netflix.eureka.CloudEurekaClient.<init>(CloudEurekaClient.java:51) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.eurekaClient(EurekaClientAutoConfiguration.java:192) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$c1700a5f.CGLIB$eurekaClient$1(<generated>) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$c1700a5f$$FastClassBySpringCGLIB$$3759430b.invoke(<generated>) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$c1700a5f.eurekaClient(<generated>) ~[spring-cloud-netflix-eureka-client-1.2.3.RELEASE.jar:1.2.3.RELEASE] 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_111] 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_111] 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_111] 
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_111] 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    ... 30 common frames omitted 
Caused by: java.lang.NoClassDefFoundError: com/thoughtworks/xstream/io/naming/NameCoder 
    at com.netflix.discovery.converters.wrappers.CodecWrappers$XStreamXml.<init>(CodecWrappers.java:358) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.converters.wrappers.CodecWrappers.create(CodecWrappers.java:133) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.converters.wrappers.CodecWrappers.getEncoder(CodecWrappers.java:75) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.converters.wrappers.CodecWrappers.getEncoder(CodecWrappers.java:66) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.provider.DiscoveryJerseyProvider.<init>(DiscoveryJerseyProvider.java:77) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.shared.transport.jersey.EurekaJerseyClientImpl$EurekaJerseyClientBuilder$MyDefaultApacheHttpClient4Config.<init>(EurekaJerseyClientImpl.java:194) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.shared.transport.jersey.EurekaJerseyClientImpl$EurekaJerseyClientBuilder.build(EurekaJerseyClientImpl.java:170) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.shared.transport.jersey.JerseyEurekaHttpClientFactory$JerseyEurekaHttpClientFactoryBuilder.buildLegacy(JerseyEurekaHttpClientFactory.java:205) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.shared.transport.jersey.JerseyEurekaHttpClientFactory$JerseyEurekaHttpClientFactoryBuilder.build(JerseyEurekaHttpClientFactory.java:186) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.shared.transport.jersey.JerseyEurekaHttpClientFactory.create(JerseyEurekaHttpClientFactory.java:143) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.shared.transport.jersey.TransportClientFactories.newTransportClientFactory(TransportClientFactories.java:49) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.DiscoveryClient.scheduleServerEndpointTask(DiscoveryClient.java:477) ~[eureka-client-1.4.12.jar:1.4.12] 
    at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:428) ~[eureka-client-1.4.12.jar:1.4.12] 
    ... 43 common frames omitted 
Caused by: java.lang.ClassNotFoundException: com.thoughtworks.xstream.io.naming.NameCoder 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_111] 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_111] 
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_111] 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_111] 
    ... 56 common frames omitted 

があるのpom.xml：

おかげ

コンソール出力は以下のとおりです。 .xsd "> 4.0.0

<groupId>com.financial</groupId> 
<artifactId>demo</artifactId> 
<version>0.0.1-SNAPSHOT</version> 
<packaging>jar</packaging> 

<name>client-service</name> 
<description>Reference application</description> 

<parent> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-parent</artifactId> 
    <version>1.4.2.RELEASE</version> 
    <relativePath/> <!-- lookup parent from repository --> 
</parent> 

<properties> 
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> 
    <java.version>1.8</java.version> 
</properties> 

<dependencies> 
    <dependency> 
     <groupId>org.springframework.cloud</groupId> 
     <artifactId>spring-cloud-starter-config</artifactId> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.cloud</groupId> 
     <artifactId>spring-cloud-starter-eureka</artifactId> 
    </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>Camden.SR3</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> 

`

ここで、アプリケーションのメインクラスです：

package com.financial; 

import org.springframework.boot.SpringApplication; 
import org.springframework.boot.autoconfigure.SpringBootApplication; 
import org.springframework.cloud.client.discovery.EnableDiscoveryClient; 

@EnableDiscoveryClient 
@SpringBootApplication 
public class ClientServiceApplication { 

public static void main(String[] args) { 
    SpringApplication.run(ClientServiceApplication.class, args); 
} 
} 

最後にbootstrap.properties

spring.application.name=client-service 
spring.cloud.config.uri=http://localhost:8888 

Answer 1

私は...この問題に詳しく見ていくためにいくつかの時間があったので、例外はの欠如によって引き起こされますxstreamライブラリでNameCoderクラス。このライブラリはEurekaの実装で使用されています。

今のところxstreamの最新バージョンは、管理対象依存関係に含まれるCamden.SR3とBrixton.SR7の1.4.9です。

NameCoderクラスは、私は私のプロジェクトのすべてではなく、依存関係xstreamバージョン1.4.8を使用するにはユーレカサーバーまたはクライアントを持っているため、ユーレカ依存性が記載されているpom.xml権利を変更する必要がありましたので、xstream-1.4.8で含み最新バージョンCamden.SR3によって管理されている依存関係により提供されています。 Mavenの中に確かにあったプロジェクトの構造によっては、これを達成するには、いくつかの選択肢がありますが、次のように最も単純な方法は次のとおりです。

<dependency> 
    <groupId>org.springframework.cloud</groupId> 
    <artifactId>spring-cloud-starter-eureka</artifactId> 
    <exclusions> 
     <exclusion> 
      <groupId>com.thoughtworks.xstream</groupId> 
      <artifactId>xstream</artifactId>       
     </exclusion> 
    </exclusions> 
</dependency>  

<dependency> 
    <groupId>com.thoughtworks.xstream</groupId> 
    <artifactId>xstream</artifactId> 
    <version>1.4.8</version><!--$NO-MVN-MAN-VER$--> 
</dependency> 

はさて、注意すべき点は、どのようユーレカ現在の実装ということです春の雲Camden.SR3とBrixton.SR7のリリースで提供さxstreamライブラリのバージョンは正確にこのクラスを持っていないxstream-1.4.9であるということでNameCoderクラスを使うのか？おそらくこの問題は、しかし、少なくとも当分の間、この変更を行うことが必要であろう春の雲の最新リリースでユーレカサービスを実装する際に、理由は自動的に解決することになったMavenのいくつかの複数の依存関係のテストバンドル中にレーダーの下に行ってきました。

Answer 2

私は同じ問題がありました。これは、XStreamのの古い含める（xstream:xstream:jar:1.1.3:compile）に関連しています。 xstreamライブラリのchange groupIdおよびSpringクラウドは新しいバージョン（com.thoughtworks.xstream:xstream:jar:1.4.9:compile）を使用します。

mvn dependency:treeコマンドを使用して、クラスパスに2つのライブラリがあるかどうかを確認します。次に、maven除外を使用してクラスパスから古いものを削除することができます。

<dependency> 
    <groupId>GROUPID</groupId> 
    <artifactId>ARTIFACTID</artifactId> 
    <version>X.Y.Z</version> 
    <exclusions> 
     <exclusion> 
      <groupId>xstream</groupId> 
      <artifactId>xstream</artifactId> 
     </exclusion> 
    </exclusions> 
</dependency>