springboot版本：2.2.4.RELEASE
springcloud版本：Hoxton.SR9
Field feignService in com.example.client.web.WebController required a single bean, but 2 were found:
- loadBalancedRetryPolicyFactory: defined by method 'loadBalancedRetryPolicyFactory' in class path resource [org/springframework/cloud/netflix/ribbon/RibbonAutoConfiguration.class]
- loadBalancedRetryFactory: defined by method 'loadBalancedRetryFactory' in class path resource [org/springframework/cloud/loadbalancer/config/BlockingLoadBalancerClientAutoConfiguration$BlockingLoadbalancerClientConfig$BlockingLoadBalancerRetryConfig.class]
2023-09-03 15:29:52.946 WARN [client,,,] 32552 --- [ restartedMain] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webController': Unsatisfied dependency expressed through field 'feignService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.example.client.service.FeignService': FactoryBean threw exception on object creation; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory' available: expected single matching bean but found 2: loadBalancedRetryPolicyFactory,loadBalancedRetryFactory
2023-09-03 15:29:52.948 INFO [client,,,] 32552 --- [ restartedMain] o.s.s.c.ThreadPoolTaskScheduler : Shutting down ExecutorService 'taskScheduler'
2023-09-03 15:29:52.955 INFO [client,,,] 32552 --- [ restartedMain] com.alibaba.druid.pool.DruidDataSource : {dataSource-1} closed
2023-09-03 15:29:53.962 WARN [client,,,] 32552 --- [ restartedMain] z.r.AsyncReporter$BoundedAsyncReporter : Timed out waiting for in-flight spans to send
2023-09-03 15:29:53.964 INFO [client,,,] 32552 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2023-09-03 15:29:53.968 WARN [client,,,] 32552 --- [ restartedMain] o.a.c.loader.WebappClassLoaderBase : The web application [client] appears to have started a thread named [RxIoScheduler-1 (Evictor)] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)
2023-09-03 15:29:53.968 WARN [client,,,] 32552 --- [ restartedMain] o.a.c.loader.WebappClassLoaderBase : The web application [client] appears to have started a thread named [spring.cloud.inetutils] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.net.Inet6AddressImpl.getHostByAddr(Native Method)
java.net.InetAddress$2.getHostByAddr(InetAddress.java:932)
java.net.InetAddress.getHostFromNameService(InetAddress.java:617)
java.net.InetAddress.getHostName(InetAddress.java:559)
java.net.InetAddress.getHostName(InetAddress.java:531)
org.springframework.cloud.commons.util.InetUtils$$Lambda$109/666823162.call(Unknown Source)
java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
java.util.concurrent.FutureTask.run(FutureTask.java)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)
2023-09-03 15:29:53.984 INFO [client,,,] 32552 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2023-09-03 15:29:53.993 ERROR [client,,,] 32552 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Field feignService in com.example.client.web.WebController required a single bean, but 2 were found:
- loadBalancedRetryPolicyFactory: defined by method 'loadBalancedRetryPolicyFactory' in class path resource [org/springframework/cloud/netflix/ribbon/RibbonAutoConfiguration.class]
- loadBalancedRetryFactory: defined by method 'loadBalancedRetryFactory' in class path resource [org/springframework/cloud/loadbalancer/config/BlockingLoadBalancerClientAutoConfiguration$BlockingLoadbalancerClientConfig$BlockingLoadBalancerRetryConfig.class]
Action:
Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed
Disconnected from the target VM, address: '127.0.0.1:48477', transport: 'socket'
Process finished with exit code 0
@FeignClient(value = "client-2")
public interface FeignService {
@GetMapping("/client/callClient")
String callClient();
}
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
@EnableHystrix
@EnableHystrixDashboard
public class ClientApplication {
public static void main(String[] args) {
SpringApplication.run(ClientApplication.class);
}
}
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
<version>4.0.2</version>
</dependency>
<!-- 客户端包 -->
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-client</artifactId>
<version>${spring.boot.admin.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.9</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.5.3.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
最后还是自己解决的，泪目了
No qualifying bean of type 'org.springframework.cloud.client.loadbalancer.LoadBalancedRetryFactory' available: expected single matching bean but found 2: loadBalancedRetryPolicyFactory,loadBalancedRetryFactory
出错原因是创建FeignService的过程中，因为用到了ribbon负载均衡，在LoadBalancedRetryFactory实例化的时候发现了两个相同匹配的bean，没有指定某一个bean，所以报了错。
解决方案：
在FeignService上加上qualifier = "loadBalancedRetryFactory"（我是随便加的，也不清楚换另一个有什么区别）
@FeignClient(value = "client-2",qualifier = "loadBalancedRetryFactory")
public interface FeignService {
@GetMapping("/client/callClient")
String callClient();
}
引用 皆我百晓生 小程序回复内容作答：
这个报错是因为在FeignService接口中，使用了@FeignClient注解，并且指定了value = "client-2"，表示要调用名为client-2的服务。但是启动时发现有两个符合条件的bean，具体是loadBalancedRetryPolicyFactory和loadBalancedRetryFactory。
解决这个问题有几种方法：
FeignService接口中添加@Qualifier注解指定要使用的bean。例如：@FeignClient(value = "client-2")
public interface FeignService {
@Qualifier("loadBalancedRetryFactory")
@GetMapping("/client/callClient")
String callClient();
}
@Primary注解标记其中一个bean。例如：@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
@EnableHystrix
@EnableHystrixDashboard
public class ClientApplication {
@Primary
@Bean
public LoadBalancedRetryFactory loadBalancedRetryFactory() {
// 返回loadBalancedRetryFactory的实例
}
public static void main(String[] args) {
SpringApplication.run(ClientApplication.class);
}
}
FeignService接口，使其接受多个bean。例如：@FeignClient(value = "client-2", contextId = "feignService")
public interface FeignService {
@GetMapping("/client/callClient")
String callClient();
}
然后在调用FeignService的地方使用@Qualifier注解指定要使用的bean。
以上是几种解决方案，你可以根据具体情况选择合适的方法解决问题。