Zuul Forwarding error - Trying to connect to a different(unknown) ip - spring-boot

Question

I have configured zuul proxy and eureka naming server for my spring boot application. Zuul proxy run on port 8765 and eureka runs on port 8761.
Also two other microservices, user-service and message-service run on port 8081 and 8082.
Also I have used swagger for the zuul proxy service where i can find all microservices api in one place.
Swagger configuration in Zuul proxy service
#Component
#Primary
#EnableAutoConfiguration
public class Controller implements SwaggerResourcesProvider{
#Override
public List<SwaggerResource> get() {
List<SwaggerResource> resources= new ArrayList<>();
SwaggerResource user = new SwaggerResource();
user.setName("USER-SERVICE");
user.setLocation("/api/user/v2/api-docs");
user.setSwaggerVersion("2.0");
resources.add(user);
SwaggerResource message = new SwaggerResource();
message.setName("MESSAGE-SERVICE");
message.setLocation("/api/message/v2/api-docs");
message.setSwaggerVersion("2.0");
resources.add(message);
return resources;
}
}
application.yml of Zuul proxy
server:
port: 8765
eureka:
client:
serviceUrl:
defaultZone: http://eureka-naming-server:8761/eureka/
instance:
prefer-ip-address: true
metadataMap:
instanceId: ${vcap.application.instance_id:${spring.application.name}:${spring.application.instance_id:${random.value}}}
instanceId: ${vcap.application.instance_id:${spring.application.name}:${spring.application.instance_id:${random.value}}}
zuul:
prefix: /api
sensitive-headers: Cookie,Set-Cookie
routes:
user-service:
path: /user/**
service-id: USER-SERVICE
message-service:
path: /message/**
service-id: MESSAGE-SERVICE
Also i have used docker-compose file to up the docker microservices with default subnet (169.254.3.0/24).
ip address of user-service is 169.254.3.6
ip address of message-service is 169.254.3.10
Here is the issue
When I call these services via zuul proxy swgger ui, often i am getting 500 error. That for the first time i hit the specific url it throws 500 error.
but after few attempt i get the response.
Zuul log which indicate problem
com.netflix.zuul.exception.ZuulException: Forwarding error
...
Caused by: com.netflix.client.ClientException: null
...
Caused by: java.lang.RuntimeException: org.apache.http.conn.ConnectTimeoutException: Connect to 172.22.97.14:8081 [/172.22.97.14] failed: connect timed out
...
Caused by: org.apache.http.conn.ConnectTimeoutException: Connect to 172.22.97.14:8081 [/172.22.97.14] failed: connect timed out
...
Caused by: java.net.SocketTimeoutException: connect timed out
I have no idea about 172.22.97.14:8081, why is not try to connect 172.22.97.14:8081 instead of connect to 169.254.3.6:8081
Can someone help me to understand what is happening in here..
Any help would be grateful !
[Edit]
zuul proxy container ip is 169.254.3.10

Answer 1

This problem occured on my project when I was using the same Zuulserver for developing microservices on localhost and DEV environment (when I started microservis on localhost it connected to zullserver on DEV env.). Then when I tried to call some operation through zuulserver it tried to connect to microservis not on DEV env. but on my machine.
I suspect the same problem on your side and IP on which you are developing your application is 172.22.97.14:8081.