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