Spring Cloud Netflix ERROR DiscoveryClient - ........ was unable to send heartbeat!

Hi,

I'm using Eureka with Brixton.RC2 on my local box. I am facing below issue with Discovery client. I tried almost all the posts who this issue is reported, but I am not able to resolve this issue. Could you help on this:

7620: WARN  RetryableEurekaHttpClient - Request execution failure
7620: ERROR DiscoveryClient - DiscoveryClient_USER-SERVICE/153.39.212.155:user-service:1111 - was unable to send heartbeat!
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
        at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)
        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)
        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92)
        at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)
        at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)
        at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:827)
        at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1383)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)`

My code for Eureka Server yml file is below:

server:
  port: 8761

eureka:
  client:
    registerWithEureka: false
    fetchRegistry: false
  server:
      waitTimeInMsWhenSyncEmpty: 0
  instance:
    hostname: localhost`

The discovery client application.yml file is as below:

server:
  context-path: /users
  port: 1111   # HTTP (Tomcat) port

spring:
  application:
     name: user-service

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
    region: default
    registryFetchIntervalSeconds: 5
    availabilityZones: 
      default: ${APPLICATION_DOMAIN:${DOMAIN:defaultZone}} 
  instance:
    leaseRenewalIntervalInSeconds: 10

endpoints:
  restart:
    enabled: true

Please help me to find, any missing part.

Thanks,

Anzar

Comment From: anz2050

Below are the project link on github:

Eureka Server project: https://github.com/anz2050/spring-eureka-server

Eureka Client project: https://github.com/anz2050/microservice-user-service

Comment From: spencergibb

does the error happen frequently or just once? What is the problem, does the client not register? Your two links above are the same.

Comment From: anz2050

Sorry, I updated the link.

Error is continously comming, after 10-15 seconds of client startup.

First time it register with 200 status code and I can see the services are up in Eureka Server dashboard. But after 10-15 seconds, it is throwing error in client log with below error:

7620: ERROR DiscoveryClient - DiscoveryClient_USER-SERVICE/153.39.212.155:user-service:1111 - was unable to send heartbeat!

Comment From: anz2050

There was mis-match version of 'spring-cloud-dependencies' in server and client. I updated it to 'Brixton.RELEASE'.

Now, it is working fine.

Thanks

Comment From: BruceOuyang

thanks, i got the same problem, you helped @anz2050

Comment From: Falci

I'm facing this same issue, but @anz2050's solution didn't work for me. I also tried the new version.

I'm running Eureka in a Docker container (springcloud/eureka).

I've created a /etc/hosts entry on my computer to point eureka to correct docker IP. I can access the Eureka's UI in http://eureka:8761

pom.xml

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.2.RELEASE</version>
    </parent>
...
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR4</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
...
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>

Bootstrap.java

@SpringBootApplication
@Configuration
@EnableAutoConfiguration
@EnableEurekaClient
public class Bootstrap {

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

}

application.yml

spring:
  application:
    name: auth-middle
eureka:
  instance:
    preferIpAddress: true
  client:
    serviceUrl:
      defaultZone: http://eureka:8761/eureka

Comment From: spencergibb

@Falci, it's not the same issue, as the reporter found he had a mismatched version. If you can provide a sample project that reproduces the error, please open a new issue.

Comment From: mgumerov

This may be the same issue. We don't know what spring-cloud version the server (which is in the container) was built with

Comment From: fifteenzhang

Same issue And I fix it with eureka.client.serviceUrl.defaultZone Configuration

Refrences