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

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