Load balancer does not have available server for client

错误信息


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

    at org.springframework.cloud.openfeign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:91)
    at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:119)
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:89)
    at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100)
    at com.sun.proxy.$Proxy111.index(Unknown Source)
    at com.song.china.demo.service.impl.AdvertCrowdRecordServiceImpl.index(AdvertCrowdRecordServiceImpl.java:29)
    at com.song.china.demo.service.impl.AdvertCrowdRecordServiceImplTest.indexTest(AdvertCrowdRecordServiceImplTest.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
Caused by: com.netflix.client.ClientException: Load balancer does not have available server for client: localhost
    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:10327)
    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:10423)
    at rx.Observable.subscribe(Observable.java:10390)
    at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:443)
    at rx.observables.BlockingObservable.single(BlockingObservable.java:340)
    at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:112)
    at org.springframework.cloud.openfeign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:84)
    ... 38 more

 

以上是自定义 Feign.Builder 调用第三方接口时出现得错误,自定义代码:

    @Bean
    public Feign.Builder feignBuilder(Decoder feignDecoder,
                                      Encoder feignEncoder,
                                      Request.Options options,
                                      Client feignClient,
                                      Contract contract) {
        return Feign.builder()
                .client(feignClient)
                .decoder(feignDecoder)
                .encoder(feignEncoder)
                .contract(contract)
                .options(options)
                .retryer(Retryer.NEVER_RETRY);
    }

处理错误方式就是添加代码

        if (feignClient instanceof LoadBalancerFeignClient) {
            feignClient = ((LoadBalancerFeignClient) feignClient).getDelegate();
        }

完整代码如下:

    @Bean
    public Feign.Builder feignBuilder(Decoder feignDecoder,
                                      Encoder feignEncoder,
                                      Request.Options options,
                                      Client feignClient,
                                      Contract contract) {
        if (feignClient instanceof LoadBalancerFeignClient) {
            feignClient = ((LoadBalancerFeignClient) feignClient).getDelegate();
        }

        return Feign.builder()
                .client(feignClient)
                .decoder(feignDecoder)
                .encoder(feignEncoder)
                .contract(contract)
                .options(options)
                .retryer(Retryer.NEVER_RETRY);
    }

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