Spring Cloud Feign错误

问题描述 投票:0回答:6
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'feignController': Unsatisfied dependency expressed through field 'feignService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.study.base.microservices.service.BookFeignClient': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-ribbon?
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.study.base.microservices.FeignClient.main(FeignClient.java:19) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.study.base.microservices.service.BookFeignClient': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-ribbon?
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:175) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1634) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:254) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.addCandidateEntry(DefaultListableBeanFactory.java:1316) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1282) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    ... 19 common frames omitted
Caused by: java.lang.IllegalStateException: No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-ribbon?
    at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.loadBalance(FeignClientFactoryBean.java:148) ~[spring-cloud-netflix-core-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.cloud.netflix.feign.FeignClientFactoryBean.getObject(FeignClientFactoryBean.java:166) ~[spring-cloud-netflix-core-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:168) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    ... 29 common frames omitted

book feign client.Java

@FeignClient(name="book-service")
public interface BookFeignClient {

    @RequestMapping("book/view/{id}")
    public Book viewBook(@RequestParam("id") String id);

}

feign controller.Java

@RestController
public class FeignController {

    @Autowired
    private BookFeignClient feignService;

    @GetMapping("feign/view/{id}")
    public Book viewBook(@PathVariable String id) {

        return feignService.viewBook(id);
    }


}

feign client.Java

@SpringBootApplication
@EnableFeignClients
@EnableDiscoveryClient
public class FeignClient {

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

application.yml

server:
  port: 8020
spring:
  application:
    name: micro-feign-client
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  instance:
    preferIpAddress: true
ribbon:
  eureka:
    enabled: true

pom.hml

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-feign</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

Dalston.SR4

我怎样才能解决这个问题 ?

java spring
6个回答
7
投票

我最近遇到了同样的错误,Spring boot 2.0.3.RELEASE。当我首先添加openfeign依赖,没有版本时,我发现Maven没有拉下依赖(不知道为什么)。所以我必须明确地为maven定义版本以实际拉它。有了这个,我也传递了spring-cloud-starter-Netflix-ribbon。此时,当我启动服务器时,我得到了第一篇文章中指定的相同错误。将spring-cloud-starter-Netflix-ribbon依赖项添加到pom中的版本后,错误得到了解决。所以我最终添加了这两个依赖项。

           <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
                <version>2.0.0.RELEASE</version>
           </dependency> 
           <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
                <version>2.0.0.RELEASE</version>
           </dependency>

2
投票

ribbon中添加pom.xml依赖项。

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-cloud-starter-ribbon</artifactId>
</dependency>

我也看到你的BookFeignClient有些不一致。应使用@PathVariable代替@RequestParam

@FeignClient(name="book-service")
public interface BookFeignClient {

    @RequestMapping("book/view/{id}")
    public Book viewBook(@PathVariable("id")  String id);

}

1
投票
@SpringBootApplication
@EnableFeignClients
@EnableDiscoveryClient
public class FeignClient {

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

改成

@SpringBootApplication
@EnableFeignClients
@EnableDiscoveryClient
public class FeignClientApplication {

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

它现在有效


0
投票

尝试在您的应用程序类中添加以下代码,即FeignClient:

@Bean
@LoadBalanced
RestTemplate restTemplate() {
    return new RestTemplate();
}

然后检查。

另外我认为你的

  @GetMapping("feign/view/{id}")
    public Book viewBook(@PathVariable String id) { // pertaining to feign Controller 

应该替换为:

 @RequestMapping("book/view/{id}")
 public Book viewBook(@RequestParam("id") String id);

0
投票

将接口BookFeignClient更改为下面的版本,在此更改之后Spring将不需要平衡。

@FeignClient(name="book-service", url = "https://meu.dominio.com")
public interface BookFeignClient {

    @RequestMapping("book/view/{id}")
    public Book viewBook(@PathVariable("id")  String id);
}

0
投票

我认为您应该在代理中添加以下注释:

@FeignClient(name="book-service")
@RibbonClient(name="external-service-name") // this is missing, the name of the external service registered in your naming server
public interface BookFeignClient {
...
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