整合order多模块之后，Failed to introspect Class报错，并尝试了许多办法还是不可以

来源：5-9 项目改造成多模块

土豆咬土豆

2018-08-12

在版本上spring boot 2.0.0.M2 另一个是M3与老师完全一致其次在启动类上已经添加了@EnableFeignClients(basePackages = "com.imooc.product.client")并且product的依赖都已经导入并且可以使用

尝试过将feign的版本改成2.0.0.M1 还是不行接下来是报错信息

2018-08-12 12:30:05.425 ERROR 12100 --- [ main] o.s.boot.SpringApplication : Application startup failed

java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.openfeign.ribbon.FeignRibbonClientAutoConfiguration] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]

at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:659) ~[spring-core-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:556) ~[spring-core-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:541) ~[spring-core-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:599) ~[spring-core-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:728) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:670) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:638) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1507) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:421) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:391) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:97) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:693) ~[spring-context-5.0.0.RC3.jar:5.0.0.RC3]

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) ~[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: java.lang.NoClassDefFoundError: org/springframework/cloud/client/loadbalancer/LoadBalancedRetryFactory

写回答

3回答

大吉本人

2019-08-10

如师兄说的, 是product-client里的feign版本和order里的feign版本不一致导致的.

都配置成如下版本试试:

1. order服务order-server模块的feign.

      <!--feign-->
      <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.0.0.M3</version>
        </dependency>
      </dependencies>

2. product服务的feign.

  <dependencyManagement>
        <dependencies>
            <!--feign-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
                <version>2.0.0.M3</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

3. product服务的product-client模块重新打jar包.

4. order服务mvn clean package后启动试试.