FeignClient not resolving Eureka service name

Question

I'm writing a Eureka Client Application using spring-cloud-starter-openfeign client. Here is my POM

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>service-registration-and-discovery-client</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>service-registration-and-discovery-client</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
</properties>

<dependencies>
    <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-netflix-eureka-server</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

As you can see, I'm using spring boot version 2.2.4.RELEASE spring-cloud.version Hoxton.SR1

This is my application class:

@SpringBootApplication
@EnableFeignClients
public class ServiceRegistrationAndDiscoveryClientApplication {

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

}

Till herem My client application is getting registered on Eureka service successfully, i can see my applicaiton on Eureka page as well.

Now I've written an interface to call another service, which is registered on Eureka also,

@FeignClient("ANOTHER-SERVICE")
public interface SPProxy {

    @PostMapping("/anotherserviceplatform/api/resource/test")
    String testAPI(@RequestBody TestRequestBody request);
}

and I'm calling this method from one of my controller. but Feign is not resolving the service-name to It's URL. it is tryign to make http call to

http://ANOTHER-SERVICE/anotherservice/api/resource/test

instead of calling

http://192.168.1.1:8080/anotherservice/api/resource/test

and getting timeout exception (Which is obvious). below is the stacktrace

2020-01-31 13:03:56.281 ERROR 16693 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is feign.RetryableException: connect timed out executing POST http://ANOTHER-SERVICE/anotherservice/api/resource/test] with root cause

java.net.SocketTimeoutException: connect timed out
    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:na]
    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399) ~[na:na]
    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242) ~[na:na]
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224) ~[na:na]
    at java.base/java.net.Socket.connect(Socket.java:591) ~[na:na]
    at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:177) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:474) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:569) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:242) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:341) ~[na:na]
    at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:362) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1248) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1187) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1081) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1015) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream0(HttpURLConnection.java:1362) ~[na:na]
    at java.base/sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:1337) ~[na:na]
    at feign.Client$Default.convertAndSend(Client.java:174) ~[feign-core-10.4.0.jar:na]
    at feign.Client$Default.execute(Client.java:77) ~[feign-core-10.4.0.jar:na]
    at org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.execute(FeignLoadBalancer.java:93) ~[spring-cloud-openfeign-core-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.execute(FeignLoadBalancer.java:56) ~[spring-cloud-openfeign-core-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at com.netflix.client.AbstractLoadBalancerAwareClient$1.call(AbstractLoadBalancerAwareClient.java:104) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
    at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:303) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
    at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:287) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
    at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:231) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:228) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:286) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onNext(OnSubscribeConcatMap.java:144) ~[rxjava-1.3.8.jar:1.3.8]
    at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:185) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
    at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
    at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.Subscriber.setProducer(Subscriber.java:209) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.Observable.subscribe(Observable.java:10423) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.Observable.subscribe(Observable.java:10390) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:443) ~[rxjava-1.3.8.jar:1.3.8]
    at rx.observables.BlockingObservable.single(BlockingObservable.java:340) ~[rxjava-1.3.8.jar:1.3.8]
    at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:112) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
    at org.springframework.cloud.openfeign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:83) ~[spring-cloud-openfeign-core-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:110) ~[feign-core-10.4.0.jar:na]
    at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:80) ~[feign-core-10.4.0.jar:na]
    at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103) ~[feign-core-10.4.0.jar:na]
    at com.sun.proxy.$Proxy104.checkPincodeServiceability(Unknown Source) ~[na:na]
    at com.example.serviceregistrationanddiscoveryclient.ServiceInstanceRestController.serviceInstancesByApplicationName(ServiceRegistrationAndDiscoveryClientApplication.java:46) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.3.RELEASE.jar:5.2.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]

EDIT1: below is my application.properties

spring.application.name=test-client
eureka.client.serviceUrl.defaultZone=http://eurekahost:8761/eureka/

Flatting

Pls show your application.yml (or application.properties) – Bowhead

@Bowhead application.properties added – Flatting

Can you add more information about ANOTHER-SERVICE ? Also, is it available if you use raw URL instead of ribbon name in Feign client? – Bowhead

Yes It is available, even if i use DiscoverClient.getInstances("ANOTHER-SERVICE"), this is returning me the active instance with correct IP and PORT – Flatting

I think you also need to add @DiscoveryClient at class ServiceRegistrationAndDiscoveryClientApplication to connect to erureka – Streusel

@Vipul didn't work :( – Flatting

I saw in the applications.properties, that you have spring.application.name=test-client .That's the name of which one microservice? Have you tried to change the parameter of FeignClient to @FeignClient("test-client") .The FeignClient value has to match with the name of the app you are looking for to connect – Dekaliter

@Dekaliter . I have 2 apps, a client app that is trying to connect to another-service. this applicatino.properties file is for the client application. it's name is test-client. this app trying to connect to another-service – Flatting

@AbdulMohsin did you get solution? – Asteroid

any update on how did you solve it ? – Deduction

Answer 1

Recently I also faced the same issue. I was kind of able to figure out the root cause of this behavior when working with localhost.

Screenshot of issue reproduced at local

The whole reason for this to happen is that the eureka server is unable to resolve the http://currency-exchange-service/currency-exchange/from/USD/to/INR to http://localhost:9093/currency-exchange/from/USD/to/INR

if you check your Eureka server dashboard and hover the services registered you will see the hostname that eureka server is pointing as shown in below screenshot. If you hover link (under status column), the hostname we see is not correct which is causing this issue.

Screenshot of Eureka dashboard, the cause of the issue

Solution: Add the below property in your application.properties file of your Eureka client applications eureka.instance.hostname=localhost

in your case please put the appropriate host name.

and that should be it. After making the change restart you client applications. Go to you Eureka Dashboard again hover the link for you registered applications this should look something like below:

Screen shot of Eureka server dashboard after making the appropriate changes .

After making the changes please try and access your Http request using the feign client. It worked for me. Screenshot of the final result with API result

Feverish

I tried that but still got the same error. Looks like there is some other issue. – Courbevoie

any solution worked in this case ? i am not seeing any accepted answer .. – Noh

Answer 2

you can use restTemplate.exchange from spring automatically

or

private String getAnotherServiceBaseAddress() {

        try {

            InstanceInfo info = getEurekaClient().getNextServerFromEureka("another-service", false);
            if (info == null || info.getHomePageUrl() == null)
                return "(default)http://192.168.1.1:8080/anotherservice";
            else
                return info.getHomePageUrl()+"/anotherservice;

        } catch (NullPointerException e) {
             return "(default)http://192.168.1.1:8080/anotherservice";
        }
    }

public static EurekaClient getEurekaClient() {
    return applicationContext.getBean(EurekaClient.class);
}

finally:

HttpGet http = new HttpGet(getAnotherServiceBaseAddress() + "/api/resource/test");

Supernova

I know i can go with this way. but due to some reason I have to use FeignClient. so that it will take care all the stuff internally and i do not have to make http calls manually. – Flatting

Answer 3

There is one more reason for that:

1 - Check the application properties it should be like that :

spring.application.name=reception-service
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka
eureka.client.enabled=true
spring.cloud.config.enabled=false
eureka.instance.hostname=localhost 

2 - Make sure the service name is in capital letters, not small letters : like that :

@FeignClient(name = "INSURANCE", path = "/apis/v1/inc")

Not like

@FeignClient(name = "Insurance", path = "/apis/v1/inc")

3 - Add important annotation :

@SpringBootApplication
@EnableFeignClients

Thumbprint

Answer 4

Adding eureka.client.enabled=true to application.properties file fixed issue for me

Gussie

Answer 5

eureka.instance.hostname=localhost add this to your application properties of the feign client service

Axilla

Answer 6

I had the same issue and it turns out that I didnt set the eureka.client.fetchRegistry = true to the application.yaml. Here is my config. Hope it help.

eureka:
  instance:
    prefer-ip-address: true
  client:
    # Tell it to fetch the registry of microservice
    fetchRegistry: true
    # Need to register with Eureka
    registerWithEureka: true
    serviceUrl:
      #url where other service can use to fetch or expose service detail
      defaultZone: http://localhost:8070/eureka/

Dacha

Answer 7

I was also having the same issue and struggled for many days to identify it. Sharing here, how did I fix: I had mention in following ways in my Feign Service Interface:

@FeignClient("RATINGSERVICE")

But my original Rating controller was having

@RequestMapping("/ratings")

Then I realized Eureka Service Discovery interpreting as "RATINGSERVICE" = "http://HostName:PortName"

where "/ratings" was missing. Then I just changed the above as

@FeignClient(name = "RATINGSERVICE", path = "/ratings")

This fixed my issue and now I'm able to use service name in Feign client.

Byre