I am facing issues using Zuul and Ribbon. I am using also Eureka for microservice registry.
- I have ribbon-service(port 9000) communicating with the user-service using the REST API
- user-service has 2 instances (on port 8081 and 8091)
- on ribbon-service I have implemented client-side load balancing using hystrix and feign client
- I consume ribbon-service API using Zuul route, and this API then triggers user-service API
When I start my microservice ecosystem and try to consume ribbon-service API(zuulservice:8761/ribbon-service/) I get the following error:
com.netflix.zuul.exception.ZuulException: Forwarding error at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.handleException(RibbonRoutingFilter.java:189) ~[spring-cloud-netflix-zuul-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.forward(RibbonRoutingFilter.java:164) ~[spring-cloud-netflix-zuul-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.run(RibbonRoutingFilter.java:112) ~[spring-cloud-netflix-zuul-2.0.0.RELEASE.jar:2.0.0.RELEASE] at com.netflix.zuul.ZuulFilter.runFilter(ZuulFilter.java:117) ~[zuul-core-1.3.1.jar:1.3.1] at com.netflix.zuul.FilterProcessor.processZuulFilter(FilterProcessor.java:193) ~[zuul-core-1.3.1.jar:1.3.1] at com.netflix.zuul.FilterProcessor.runFilters(FilterProcessor.java:157) ~[zuul-core-1.3.1.jar:1.3.1] at com.netflix.zuul.FilterProcessor.route(FilterProcessor.java:118) ~[zuul-core-1.3.1.jar:1.3.1] at com.netflix.zuul.ZuulRunner.route(ZuulRunner.java:96) ~[zuul-core-1.3.1.jar:1.3.1] at com.netflix.zuul.http.ZuulServlet.route(ZuulServlet.java:116) ~[zuul-core-1.3.1.jar:1.3.1] at com.netflix.zuul.http.ZuulServlet.service(ZuulServlet.java:81) ~[zuul-core-1.3.1.jar:1.3.1] at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:165) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE] at org.springframework.cloud.netflix.zuul.web.ZuulController.handleRequest(ZuulController.java:44) [spring-cloud-netflix-zuul-2.0.0.RELEASE.jar:2.0.0.RELEASE] at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) [spring-webmvc-5.0.5.RELEASE.jar:5.0.5.RELEASE]................ Caused by: com.netflix.client.ClientException: Load balancer does not have available server for client: ribbon-service at com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer(LoadBalancerContext.java:483) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5] at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:184) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5] at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180) ~[ribbon-loadbalancer-2.2.5.jar:2.2.5] at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8] at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) ~[rxjava-1.3.8.jar:1.3.8] at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) ~[rxjava-1.3.8.jar:1.3.8] at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
This error remains for some time, and after that time I get the following output:
2018-07-16 12:55:43.260 INFO 19233 --- [erListUpdater-0] c.netflix.config.ChainedDynamicProperty : Flipping property: ribbon-service.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
After that output everthing works great again.
When I hit eurekaservice:8765/eureka/apps I have registered both ribbon-service and all the user-service instances.
This is my zuul service application.properties:
> #Service port
server.port=8765
#Service port
spring.application.name=zuul-service
# Discovery Server Access
eureka.client.service-url.defaultZone:http://localhost:8761/eureka/
eureka.instance.lease-renewal-interval-in-seconds=3
#User service configuration
zuul.routes.user-service.path:/user-service/**
zuul.routes.user-service.serviceId:user-service
#Product service configuration
zuul.routes.product-service.path:/product-service/**
zuul.routes.product-service.serviceId:product-service
#Product service configuration
zuul.routes.shoppingcart-service.path:/shoppingcart-service/**
zuul.routes.shoppingcart-service.serviceId:shoppingcart-service
#Product service configuration
zuul.routes.payment-service.path:/payment-service/**
zuul.routes.payment-service.serviceId:payment-service
#Product service configuration
zuul.routes.ribbon-service.path:/ribbon-service/**
zuul.routes.ribbon-service.serviceId:ribbon-service
This is my zuul-service bootstrap.properties:
> #Application name
spring.application.name=zuul-service
#hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds: 12600
ribbon.ConnectTimeout: 6000
ribbon.ReadTimeout: 60000
robbon.eureka.enabled: true
hystrix.command.default.execution.timeout.enabled=false
I am using spring 2.0.1 and spring cloud Finchley.RELEASE.
Can somebody explain what is going on?
Thank you!
ribbon-service. Are you startingribbon-servicebefore starting Zuul? If you are starting it after Zuul it will take some time before Zuul gets the updated information from Eureka. – Ryan Baxterribbon-serviceis started before Zuul and it registers itself before Zuul starts it should be included in the list of services fetched from the Eureka server when Zuul registers itself with Eureka. I am not sure what else we can do. Can you provide a sample that reproduces the problem? – Ryan Baxter