Could not resolve host: peer1-service but could see in eureka dashboard

[VravikumarV]

Hi,

We are refactoring existing monolithic based application to micro-services and we decided to use the following spring cloud (Netflix) version and end up with "Could not resolve host: peer1-service" on curl for registered micro service with "spring:application:name: peer1-service".

Could some one help me here please as I struck up with this for a long time by spending on google and trying different ways...

JDK 8
Spring boot 2.0.0.RELEASE
Spring cloud: Finchley.M8

1. Eureka Server with below configuration (Also annotated with @EnableEurekaServer):

spring:
application:
name: eureka-service

eureka:
client:
register-with-eureka: false
fetch-registry: false
server:
wait-time-in-ms-when-sync-empty: 0

2. peer1-service & peer2-service has same configurations except service name & port

spring:
application:
name: peer1-service

server:
port: 8282

eureka:
instance:
hostname: localhost
client:
register-with-eureka: true
fetch-registry: true
service-url:
defaultZone: http://localhost:8080/eureka

This issue has come up when I start using service name which register with eureka discovery service where as if I use localhost instead of peer1-service / peer2-service, its working fine. Then I understood that something went wrong with discovery of service based on the name what I provided in application.yaml

The logs for reference (Same as for peer2-service)...

1. Eureka Server logs:

2018-03-07 23:37:10.551 WARN 7327 --- [nio-8080-exec-2] c.n.e.registry.AbstractInstanceRegistry : DS: Registry: lease doesn't exist, registering resource: PEER1-SERVICE - venkatas-mbp:peer1-service:8282
2018-03-07 23:37:10.551 WARN 7327 --- [nio-8080-exec-2] c.n.eureka.resources.InstanceResource : Not Found (Renew): PEER1-SERVICE - venkatas-mbp:peer1-service:8282
2018-03-07 23:37:10.587 INFO 7327 --- [nio-8080-exec-3] c.n.e.registry.AbstractInstanceRegistry : Registered instance PEER1-SERVICE/venkatas-mbp:peer1-service:8282 with status UP (replication=false)
2018-03-07 23:37:10.587 INFO 7327 --- [nio-8080-exec-4] c.n.e.registry.AbstractInstanceRegistry : Registered instance PEER1-SERVICE/venkatas-mbp:peer1-service:8282 with status UP (replication=false)
2018-03-07 23:37:11.139 ERROR 7327 --- [get_localhost-1] c.n.e.cluster.ReplicationTaskProcessor : Network level connection to peer localhost; retrying after delay

com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused (Connection refused)
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
at com.netflix.eureka.cluster.DynamicGZIPContentEncodingFilter.handle(DynamicGZIPContentEncodingFilter.java:48) ~[eureka-core-1.8.6.jar:1.8.6]

2. PEER2-SERVICE log trace (same as PEER1-SERVICE)

2018-03-07 23:37:16.343 INFO 7324 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA2-SERVICE/venkatas-mbp:eureka2-service:8181 - Re-registering apps/EUREKA2-SERVICE
2018-03-07 23:37:16.343 INFO 7324 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA2-SERVICE/venkatas-mbp:eureka2-service:8181: registering service...
2018-03-07 23:37:16.357 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : The response status is 200
2018-03-07 23:37:16.392 INFO 7324 --- [nfoReplicator-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA2-SERVICE/venkatas-mbp:eureka2-service:8181 - registration status: 204
2018-03-07 23:37:16.392 INFO 7324 --- [tbeatExecutor-0] com.netflix.discovery.DiscoveryClient : DiscoveryClient_EUREKA2-SERVICE/venkatas-mbp:eureka2-service:8181 - registration status: 204
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Disable delta property : false
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Single vip registry refresh property : null
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Force full registry fetch : false
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Application is null : false
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Registered Applications size is zero : true
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Application version is -1: false
2018-03-07 23:37:46.362 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : Getting all instance registry info from the eureka server
2018-03-07 23:37:46.395 INFO 7324 --- [freshExecutor-0] com.netflix.discovery.DiscoveryClient : The response status is 200

[ShahanshahAli]

This is duplicate of this seems:
spring-cloud/spring-cloud-netflix#2893