<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M3</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<spring-cloud.version>Finchley.M2</spring-cloud.version>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
报错信息
Caused by: java.lang.NoClassDefFoundError: feign/Feign$Builder
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_121]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_121]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_121]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:641) ~[spring-core-5.0.0.RC3.jar:5.0.0.RC3]
... 35 common frames omitted
Caused by: java.lang.ClassNotFoundException: feign.Feign$Builder
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_121]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_121]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_121]
... 39 common frames omitted
尝试跟换maven仓库 从新下载 依旧是ClassNotFound
尝试更改feign版本 现在选用
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
<version>1.1.5.RELEASE</version>
</dependency>
启动项目不会出现classNotFound
出现了新的问题 求助
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'clientController': Unsatisfied dependency expressed through field 'productClient'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.imooc.order.client.ProductClient': FactoryBean threw exception on object creation; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'feignRetryer' defined in org.springframework.cloud.netflix.feign.FeignClientsConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [feign.Retryer]: Factory method 'feignRetryer' threw exception; nested exception is java.lang.NoSuchFieldError: NEVER_RETRY
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:570) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:356) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1352) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:580) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:499) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:122) ~[spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:386) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.M3.jar:2.0.0.M3]
at com.imooc.order.OrderApplication.main(OrderApplication.java:14) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.imooc.order.client.ProductClient': FactoryBean threw exception on object creation; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'feignRetryer' defined in org.springframework.cloud.netflix.feign.FeignClientsConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [feign.Retryer]: Factory method 'feignRetryer' threw exception; nested exception is java.lang.NoSuchFieldError: NEVER_RETRY
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:172) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1663) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1188) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:258) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:205) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:255) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1305) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1271) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1094) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1058) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:567) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
... 19 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'feignRetryer' defined in org.springframework.cloud.netflix.feign.FeignClientsConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [feign.Retryer]: Factory method 'feignRetryer' threw exception; nested exception is java.lang.NoSuchFieldError: NEVER_RETRY
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:586) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1261) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1109) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:499) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.cloud.context.named.NamedContextFactory.createContext(NamedContextFactory.java:116) ~[spring-cloud-context-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.context.named.NamedContextFactory.getContext(NamedContextFactory.java:85) ~[spring-cloud-context-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.context.named.NamedContextFactory.getInstance(NamedContextFactory.java:121) ~[spring-cloud-context-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.get(FeignClientFactoryBean.java:195) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.feign(FeignClientFactoryBean.java:86) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:223) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:165) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
... 30 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [feign.Retryer]: Factory method 'feignRetryer' threw exception; nested exception is java.lang.NoSuchFieldError: NEVER_RETRY
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:182) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:575) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
... 48 common frames omitted
Caused by: java.lang.NoSuchFieldError: NEVER_RETRY
at org.springframework.cloud.netflix.feign.FeignClientsConfiguration.feignRetryer(FeignClientsConfiguration.java:111) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.netflix.feign.FeignClientsConfiguration$$EnhancerBySpringCGLIB$$5951634e.CGLIB$feignRetryer$3(<generated>) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cloud.netflix.feign.FeignClientsConfiguration$$EnhancerBySpringCGLIB$$5951634e$$FastClassBySpringCGLIB$$64202521.invoke(<generated>) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:360) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]
at org.springframework.cloud.netflix.feign.FeignClientsConfiguration$$EnhancerBySpringCGLIB$$5951634e.feignRetryer(<generated>) ~[spring-cloud-netflix-core-2.0.0.M2.jar:2.0.0.M2]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_121]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:155) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
... 49 common frames omitted
SpringCloud组件实现微服务,【已升级Finchley.Release】
了解课程