Question

我尝试将Springboot 1.x.y（Brussels-SR12）迁移到2.x.y。我使用FeignClients

我更改Maven配置：

<spring-cloud.version>Finchley.RELEASE</spring-cloud.version>

如此

<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-openfeign</artifactId>
<version>2.0.0.RELEASE</version>

我更改了所有导入：

import org.springframework.cloud.netflix.feign.EnableFeignClients;

import org.springframework.cloud.netflix.feign.FeignClient;

到

import org.springframework.cloud.openfeign.EnableFeignClients;

import org.springframework.cloud.openfeign.FeignClient;

我使用此界面：

@FeignClient(value = "COMPANY", fallbackFactory = CompanyClientFallbackFactory.class, configuration = FeignConfiguration.class)
public interface CompanyClient extends CompanyApi {
}

在运行带有弹簧上下文的JUnit测试时，我现在遇到此错误（不在Springboot 1.x.y和旧的netflix软件包中）：

The bean 'COMPANY.FeignClientSpecification', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled.

完整跟踪：

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:125)
    at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:108)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.postProcessFields(MockitoTestExecutionListener.java:99)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.injectFields(MockitoTestExecutionListener.java:79)
    at org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener.prepareTestInstance(MockitoTestExecutionListener.java:54)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:246)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:227)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
...
Caused by: org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'COMPANY.FeignClientSpecification' defined in null: Cannot register bean definition [Generic bean: class [org.springframework.cloud.openfeign.FeignClientSpecification]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] for bean 'COMPANY.FeignClientSpecification': There is already [Generic bean: class [org.springframework.cloud.openfeign.FeignClientSpecification]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] bound.
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.registerBeanDefinition(DefaultListableBeanFactory.java:896)
    at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerClientConfiguration(FeignClientsRegistrar.java:355)
    at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerFeignClients(FeignClientsRegistrar.java:155)
    at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerBeanDefinitions(FeignClientsRegistrar.java:83)

Answer 1

这就是解决方案：

如果我们要创建多个具有相同名称或网址的伪装客户端这样他们将指向同一台服务器，但每台服务器都有不同的自定义配置我们必须使用contextId的{{1}}属性以避免名称这些配置bean发生冲突。

@FeignClient

https://github.com/spring-cloud/spring-cloud-openfeign/pull/90/commits/82fa5181fdd2e23e7414521f468ecea88e17d157

Answer 2

我找到了解决方案：Springboot 2在application.yml中需要一个新参数：

spring:
  main:
    allow-bean-definition-overriding: true

Answer 3

可能您有多个具有相同名称属性的@FeignClient定义。

Answer 4

考虑重命名其中一个bean或通过设置spring.main.allow-bean-definition-overriding = true启用覆盖

Answer 5

如果您不小心将多个@Configuration类用@EnableFeignClients注释，也会发生这种情况

Answer 6

mvn clean package 为我修复了这个错误

在Springboot 1.x中将netflix feign迁移到Springboot 2.x中的openfeign

6 个答案: