Myujth

I have microservice with a dynamic port i.e, server.port=0.
The microservice is getting registered fine at eureka and it is up and running.

However when I am trying to access it via Zuul gateway, it fails to do with the below logs in my zuul gateway.

c.netflix.loadbalancer.BaseLoadBalancer : Client: book instantiated a LoadBalancer: DynamicServerListLoadBalancer:NFLoadBalancer:name=book,current list of Servers=,Load balancer stats=Zone stats: ,Server stats: ServerList:null
c.n.l.DynamicServerListLoadBalancer : Using serverListUpdater PollingServerListUpdater
c.netflix.config.ChainedDynamicProperty : Flipping property: book.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
c.n.l.DynamicServerListLoadBalancer : DynamicServerListLoadBalancer for client book initialized: DynamicServerListLoadBalancer:NFLoadBalancer:name=book,current list of Servers=[192.168.60.1:0],Load balancer stats=Zone stats: defaultzone=[Zone:defaultzone; Instance count:1; Active connections count: 0; Circuit breaker tripped count: 0; Active connections per server: 0.0;]
,Server stats: [[Server:192.168.60.1:0; Zone:defaultZone; Total Requests:0; Successive connection failure:0; Total blackout seconds:0; Last connection made:Thu Jan 01 05:30:00 IST 1970; First connection made: Thu Jan 01 05:30:00 IST 1970; Active Connections:0; total failure count in last (1000) msecs:0; average resp time:0.0; 90 percentile resp time:0.0; 95 percentile resp time:0.0; min resp time:0.0; max resp time:0.0; stddev resp time:0.0]
]ServerList:org.springframework.cloud.netflix.ribbon.eureka.DomainExtractingServerList@4dbc2e52

However when I change the port of my microservice (book) to non dynamic one server.port = 8081, everything runs fine and each time I have to restart the zuul application as well.
I guess it does not go well when one of the microservice changes port.

Let me share the application.yml content of both the files.

Microservice (book), application.yml

spring:
 application:
 name: book

server:
 port: 0 # I change it between 0 and 8081 (8081 works like a charm)

eureka:
 client:
 service-url:
 defaultZone: $EUREKA_URI:http://localhost:8761/eureka
 instance:
 prefer-ip-address: true

Zuul application.yml

server:
 port: 8080
spring:
 application:
 name: gatekeeper

zuul:
 routes:
 book: 
 serviceId: book

#Added it so as to increase the timeout for the underlying hysterix of the zuul

hystrix:
 command:
 default:
 execution:
 isolation:
 strategy: THREAD
 thread:
 timeoutInMilliseconds: 60000

Eureka server application.yml

server:
 port: 8761

eureka:
 client:
 register-with-eureka: false
 fetch-registry: false

Sring cloud version is dynamic ($spring-cloud.version) with boot
2.1.0.release.