JSONException using Netflix Eureka

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

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

spring:
  application:
    name: EurekaServer

server:
  port: 8761

eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    festRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.web.bind.annotation.RestController;

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

spring:
  application:
    name: EurekaClient
    
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
    registerWithEureka: true
    fetchRegistry: false
  instance:
    leaseRenewalIntervalInSeconds: 10
    metadataMap:
      instanceId: ${spring.application.name}:${spring.application.instance_id:${random.value}}

server:
  port: 8188

eureka.port=8188
eureka.vipAddress=productservice.mydomain.net
eureka.preferSameZone=true
eureka.shouldUseDns=false
eureka.availabilityZones=default
eureka.serviceUrl.defaultZone=http://localhost:8761/eureka/