问题描述

使用Feign调用微服务接口报错，如下：

java.lang.RuntimeException: com.netflix.client.ClientException: Load balancer does not have available server for client: app1

	at org.springframework.cloud.netflix.feign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:71)

	at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:97)

	at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76)

	at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:108)

	at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:302)

	at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:298)

	at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)

	at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)

	at rx.Observable.unsafeSubscribe(Observable.java:10211)

	at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)

	at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)

	at rx.Observable.unsafeSubscribe(Observable.java:10211)

	at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)

	at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)

	at rx.Observable.unsafeSubscribe(Observable.java:10211)

	at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)

	at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56)

	at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47)

	at org.springframework.security.concurrent.DelegatingSecurityContextCallable.call(DelegatingSecurityContextCallable.java:86)

	at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction.call(HystrixContexSchedulerAction.java:69)

	at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)

	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

	at java.util.concurrent.FutureTask.run(FutureTask.java:266)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

	at java.lang.Thread.run(Thread.java:748)

Caused by: com.netflix.client.ClientException: Load balancer does not have available server for client: app1

	at com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer(LoadBalancerContext.java:483)

	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:184)

	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180)

	at rx.Observable.unsafeSubscribe(Observable.java:10211)

	at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94)

	at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)

	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)

	at rx.Observable.subscribe(Observable.java:10307)

	at rx.Observable.subscribe(Observable.java:10274)

	at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:445)

	at rx.observables.BlockingObservable.single(BlockingObservable.java:342)

	at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:117)

	at org.springframework.cloud.netflix.feign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:63)

	... 33 common frames omitted

问题解决

原因可能有两个：

  • 1.没有引入Eureka依赖
  • 2.@AuthorizedFeignClient注解中name写错，比如这次我按照教程以为name写app1就好，其实不然……

1.引入依赖

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-eureka</artifactId>

        </dependency>

2.将name修改正确的被调用服务的spring.application.name名称

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