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问题:

For all the Camden releases and now on the Brixton.SR7 as well, the following issue related to the Eureka Client occurs when starting the Spring Boot app:

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

For an instance I have a Spring Boot app having the @EnableDiscoveryClient annotation...

Lately I’ve been changing the Spring Cloud dependencies back to Brixton.SR6 in order to get rid of this error. Certainly, I want to use the latest versions of the Spring Cloud but how could I fix this error the right way?

Thanks

The console output is the following:

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

Here is the pom.xml : ` http://maven.apache.org/xsd/maven-4.0.0.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>

Here is the main class of the application:

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);  } }

Finally the bootstrap.properties

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

回答1:

I had the same issue. This is related to an old inclusion of xstream (xstream:xstream:jar:1.1.3:compile). The xstream library change groupId and Spring cloud use a new version (com.thoughtworks.xstream:xstream:jar:1.4.9:compile).

Use mvn dependency:tree command to check if you have the two library in your classpath. Then you can use maven exclusions to remove the old one from your classpath.

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

回答2:

I had some time to take a closer look into this issue… so the exception is caused by the absence of the NameCoder class in the xstream library. This library is used by Eureka implementation.

Now then, xstream latest version to this date is 1.4.9 which is the one that is included on the managed dependencies for Camden.SR3 and Brixton.SR7.

The latest version that includes the NameCoder class is the xstream-1.4.8 so I had to modify the pom.xml right where the eureka dependency is stated, for all of my projects have eureka server or client to use the dependency xstream version 1.4.8 instead of the provided by the Camden.SR3 managed dependencies. For sure in maven there are several alternatives to accomplish this depending of the structure of the project, but the most straight forward way is as follows:

<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>

Now then, the point to notice is that how the Eureka current implementations use the NameCoder class being that the version of the xstream library provided by the Spring Cloud Camden.SR3 and Brixton.SR7 releases is xstream-1.4.9 which doesn’t have precisely this class? Possibly this issue went under the radar during the testing bundle because of some multiple dependencies that maven ended up solving automatically, however when implementing Eureka service with the latest release of Spring Cloud it will be necessary to do this change, at least for the time being.

回答3:

I'm using spring-boot-starter-parent 2.0.3.RELEASE and spring-cloud.version Finchley.RELEASE, i had same issue - Eureka fail to start with error: java.lang.NoClassDefFoundError: com/netflix/discovery/converters/XmlXStream

I follow the above instruction but still not WORKING. Any advise? Very appreciated!!!

my POM as: exclude xstream from spring-cloud-starter-netflix-eureka-server, add dependency xstream 1.4.10

文章来源: NoClassDefFoundError: NameCoder at Spring Cloud Brixton.SR7 and Spring Cloud Camden.SR3

标签

eureka

spring-cloud