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load balancer does not have available server for client: provider

技术 2022年11月9日
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I’m trying to use Feign client. Below is my feing client:

import com.eprogrammerz.examples.domain.Movie;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;/**
 * Created by Yogen on 12/26/2016.
 */
@FeignClient(name = "movie-api")
public interface MovieApi {
    @RequestMapping(method = RequestMethod.GET, value = "/movies/{id}")
    Movie getMovie(@PathVariable("id") Long id);
}

I’m calling it from simple service as below:

@Service
public class MovieService {    @Autowired
    MovieApi movieApi;    public Movie findMovie(Long id){
        Movie movieOfTheDay = movieApi.getMovie(id);
        return movieOfTheDay;
    }
}

My spring boot app is as below:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.netflix.feign.EnableFeignClients;@EnableFeignClients(basePackages = {"com.eprogrammerz.examples"})
@EnableCircuitBreaker
@SpringBootApplication
public class ClientAppApplication {    public static void main(String[] args) {
        SpringApplication.run(ClientAppApplication.class, args);
    }
}

build.gradle

buildscript {
    ext {
        springBootVersion = '1.4.3.RELEASE'
    }
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'jar {
    baseName = 'client-app'
    version = '0.0.1-SNAPSHOT'
}
sourceCompatibility = 1.8
targetCompatibility = 1.8repositories {
    jcenter()
    mavenCentral()
    maven { url "https://repo.spring.io/snapshot" }
    maven { url "https://repo.spring.io/milestone" }
}dependencies {
    compile('org.springframework.cloud:spring-cloud-starter-feign')
    // https://mvnrepository.com/artifact/com.netflix.hystrix/hystrix-core
    compile('org.springframework.cloud:spring-cloud-starter-hystrix')
    compile("org.springframework.boot:spring-boot-starter-web"){
        exclude group: 'org.springframework.boot', module: 'spring-boot-starter-logging'
    }
    compileOnly('org.projectlombok:lombok')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:Camden.BUILD-SNAPSHOT"
        mavenBom "org.springframework.boot:spring-boot-starter-parent:${springBootVersion}"
    }
}

I’m getting error as below:

2016-12-30 13:07:16.894  INFO 6748 --- [nio-8082-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 39 ms
2016-12-30 13:07:16.939  INFO 6748 --- [nio-8082-exec-1] c.e.e.controllers.RequestController      : Calling findMovie(1203)
2016-12-30 13:07:17.240  INFO 6748 --- [rix-movie-api-1] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@547496c2: startup date [Fri Dec 30 13:07:17 EST 2016]; parent: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@542e560f
2016-12-30 13:07:17.318  INFO 6748 --- [rix-movie-api-1] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2016-12-30 13:07:17.619  INFO 6748 --- [rix-movie-api-1] c.netflix.config.ChainedDynamicProperty  : Flipping property: movie-api.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2016-12-30 13:07:17.670  INFO 6748 --- [rix-movie-api-1] c.n.u.concurrent.ShutdownEnabledTimer    : Shutdown hook installed for: NFLoadBalancer-PingTimer-movie-api
2016-12-30 13:07:17.727  INFO 6748 --- [rix-movie-api-1] c.netflix.loadbalancer.BaseLoadBalancer  : Client:movie-api instantiated a LoadBalancer:DynamicServerListLoadBalancer:{NFLoadBalancer:name=movie-api,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:null
2016-12-30 13:07:17.739  INFO 6748 --- [rix-movie-api-1] c.n.l.DynamicServerListLoadBalancer      : Using serverListUpdater PollingServerListUpdater
2016-12-30 13:07:17.746  INFO 6748 --- [rix-movie-api-1] c.n.l.DynamicServerListLoadBalancer      : DynamicServerListLoadBalancer for client movie-api initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=movie-api,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:com.netflix.loadbalancer.ConfigurationBasedServerList@45bcfd52016-12-3013:07:18.191 ERROR 6748---[nio-8082-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]:Servlet.service()for servlet [dispatcherServlet]in context with path [] threw exception [Request processing failed; nested exception is com.netflix.hystrix.exception.HystrixRuntimeException:MovieApi#getMovie(Long) failed and no fallback available.] with root causecom.netflix.client.ClientException:Load balancer does not have available server for client: movie-api
    at com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer(LoadBalancerContext.java:468)~[ribbon-loadbalancer-2.2.0.jar:2.2.0]
    at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:184)~[ribbon-loadbalancer-2.2.0.jar:2.2.0]
    at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180)~[ribbon-loadbalancer-2.2.0.jar:2.2.0]
    at rx.Observable.unsafeSubscribe(Observable.java:10211)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Observable.unsafeSubscribe(Observable.java:10211)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Subscriber.setProducer(Subscriber.java:209)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Observable.subscribe(Observable.java:10307)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Observable.subscribe(Observable.java:10274)~[rxjava-1.1.10.jar:1.1.10]
    at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:445)~[rxjava-1.1.10.jar:1.1.10]
    at rx.observables.BlockingObservable.single(BlockingObservable.java:342)~[rxjava-1.1.10.jar:1.1.10]
    at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:102)~[ribbon-loadbalancer-2.2.0.jar:2.2.0]
    at org.springframework.cloud.netflix.feign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:63)~[spring-cloud-netflix-core-1.2.4.BUILD-SNAPSHOT.jar:1.2.4.BUILD-SNAPSHOT]
    at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:97)~[feign-core-9.3.1.jar:na]
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:76)~[feign-core-9.3.1.jar:na]
    at feign.hystrix.HystrixInvocationHandler$1.run(HystrixInvocationHandler.java:108)~[feign-hystrix-9.3.1.jar:na]
    at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:301)~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.HystrixCommand$2.call(HystrixCommand.java:297)~[hystrix-core-1.5.6.jar:1.5.6]
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:46)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Observable.unsafeSubscribe(Observable.java:10211)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:51)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDefer.call(OnSubscribeDefer.java:35)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Observable.unsafeSubscribe(Observable.java:10211)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)~[rxjava-1.1.10.jar:1.1.10]
    at rx.Observable.unsafeSubscribe(Observable.java:10211)~[rxjava-1.1.10.jar:1.1.10]
    at rx.internal.operators.OperatorSubscribeOn$1.call(OperatorSubscribeOn.java:94)~[rxjava-1.1.10.jar:1.1.10]
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:56)~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction$1.call(HystrixContexSchedulerAction.java:47)~[hystrix-core-1.5.6.jar:1.5.6]
    at com.netflix.hystrix.strategy.concurrency.HystrixContexSchedulerAction.call(HystrixContexSchedulerAction.java:69)~[hystrix-core-1.5.6.jar:1.5.6]
    at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)~[rxjava-1.1.10.jar:1.1.10]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)~[na:1.8.0_51]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)~[na:1.8.0_51]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)~[na:1.8.0_51]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)~[na:1.8.0_51]
    at java.lang.Thread.run(Thread.java:745)[na:1.8.0_51]

I tried different way. But couldn’t figure out the solution. I couldn’t find any information about this on Spring Cloud Netflix too. I couldn’t find any information on discussion thread on StackOverflow too.

What I’m missing here? TIA.

Further Details:

application.yml for movie-api microservice is as below:

server:
  port: 8090
logging:
  config: classpath:log4j2.yml
spring:
  application:
    name: movie-api

Spring boot app on movie-api module:

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

And controller is as below:

@RestController
@Slf4j
public class MovieController {
    @Autowired
    private MovieRepository movieRepository;    @RequestMapping("/movies/{id}")
    public ResponseEntity<Movie> getBook(@PathVariable("id") Long id){
        log.trace("getBook({})",id);
        Optional<Movie> movie = Optional.of(movieRepository.findOneById(id));
        if(movie.isPresent())
            return new ResponseEntity(movie.get(), HttpStatus.OK);
        return new ResponseEntity<Movie>(HttpStatus.NOT_FOUND);
    }
}

spring spring-boot spring-cloud-netflix netflix-feignshareimprove this questionedited May 23 ’17 at 10:31load balancer does not have available server for client: providerCommunity♦

11asked Dec 30 ’16 at 18:35load balancer does not have available server for client: providerYogen Rai

8452721

  • 1Are you using a service discovery such as Eureka or Consul? If so, have you defined the configuration in your Spring Boot app’s application.yml to register the app as a client to Eureka? Basically, Feign is complaining that it could not find the service registered anywhere. You can very easily configure a service discovery like Eureka using Spring Cloud. See projects.spring.io/spring-cloud – Bloodysock Dec 30 ’16 at 22:37
  • 1@Bloodysock so on which side should i use discovery service? Here on client side or api side? – Yogen RaiJan 1 ’17 at 2:09
  • 1You’d register your API (better term would be “service”) with a unique name to the service discovery. The client simply discovers the service and invokes it. Spring Cloud makes it real easy for the developer especially with Spring Boot. Go through the example documented at the site I linked above. You will on your way making the service calls in 15 minutes 🙂 – Bloodysock Jan 1 ’17 at 16:04
  •  @Bloodysock yes you are right! i was missing ‘service’ registration. Thank you!. – Yogen Rai Jan 3 ’17 at 6:44

activeoldestvotesSpring Cloud Netflix.

I used Ribbon without Eureka with configuration in application.yml in ‘client-app‘ micro-service as:

movie-api:
  ribbon:
    listOfServers: http://localhost:8090

shareimprove this answeranswered Jan 3 ’17 at 6:56load balancer does not have available server for client: providerYogen Rai

8452721shareimprove this answeranswered Mar 21 at 18:08load balancer does not have available server for client: providerLuciano Nery

163shareimprove this answeranswered Mar 13 at 5:32load balancer does not have available server for client: providerDexter

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