using 'Camden.SR5' for spring-cloud-dependencies, with spring boot '1.5.2.RELEASE'.
In my current setup, I have
- eureka server
- config server (running on random ports)
- zuul gateway server
- and 2 instances of a service (running on random ports)
All these instances are successfully register with Eureka.
When all the services are running, The load balancing is done properly through zuul without any issues.
when an instance is killed, Zuul is still trying to fulfil the request using the same service which is down. However if waited till the eureka registry is fetched after shutting down the instance, requests are fulfilled with the other instances which are 'UP'.
2017-03-07 19:57:41.409 DEBUG 26658 --- [nio-5555-exec-3] c.n.l.reactive.LoadBalancerCommand : Got error org.apache.http.conn.HttpHostConnectException: Connect to 10.99.4.151:64381 [/10.99.4.151] failed: Connection refused when executed on server 10.99.4.151:64381 2017-03-07 19:57:41.420 DEBUG 26658 --- [nio-5555-exec-3] com.netflix.hystrix.AbstractCommand : Error executing HystrixCommand.run(). Proceeding to fallback logic ... com.netflix.client.ClientException: null at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:123) ~[ribbon-loadbalancer-2.2.0.jar:2.2.0] at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:81) ~[ribbon-loadbalancer-2.2.0.jar:2.2.0] at org.springframework.cloud.netflix.zuul.filters.route.support.AbstractRibbonCommand.run(AbstractRibbonCommand.java:96) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] at org.springframework.cloud.netflix.zuul.filters.route.support.AbstractRibbonCommand.run(AbstractRibbonCommand.java:42) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75) ~[httpclient-4.5.3.jar:4.5.3] at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142) ~[httpclient-4.5.3.jar:4.5.3] ... 162 common frames omitted 2017-03-07 19:57:41.425 DEBUG 26658 --- [nio-5555-exec-3] com.netflix.hystrix.AbstractCommand : No fallback for HystrixCommand. java.lang.UnsupportedOperationException: No fallback available. at com.netflix.hystrix.HystrixCommand.getFallback(HystrixCommand.java:292) [hystrix-core-1.5.6.jar:1.5.6] at org.springframework.cloud.netflix.zuul.filters.route.support.AbstractRibbonCommand.getFallback(AbstractRibbonCommand.java:117) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] at org.springframework.cloud.netflix.zuul.filters.route.support.AbstractRibbonCommand.getFallback(AbstractRibbonCommand.java:42) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_66] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.11.jar:8.5.11] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66] 2017-03-07 19:57:41.428 WARN 26658 --- [nio-5555-exec-3] o.s.c.n.z.filters.post.SendErrorFilter : Error during filtering com.netflix.zuul.exception.ZuulException: Forwarding error at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.handleException(RibbonRoutingFilter.java:170) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.forward(RibbonRoutingFilter.java:145) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] at org.springframework.cloud.netflix.zuul.filters.route.RibbonRoutingFilter.run(RibbonRoutingFilter.java:88) ~[spring-cloud-netflix-core-1.2.5.RELEASE.jar:1.2.5.RELEASE] Following are the zuul configuration used with @EnableZuulProxy and @EnableEurekaClient
server: port: 5555 spring: application: name: gateway-server cloud: config: discovery: enabled: true service-id: CONFIGSERVER fail-fast: true retry: multiplier: 1.1 initial-interval: 1000 max-attempts: 6 max-interval: 2000 hystrix: command: default: execution: isolation: thread: timeoutInMilliseconds: 100000 timeout: enabled: false ribbon: ReadTimeout: 5000 ConnectTimeout: 3000 maxAutoRetries: 1 MaxAutoRetriesNextServer: 2 OkToRetryOnAllOperations: true logging: level: ROOT: DEBUG zuul: routes: security-service: retryable: true The 2 instances of service with are running with unique instance-ids
@EnableEurekaClient @EnableHystrix @SpringBootApplication public class SecurityServer implements HealthIndicator{ public static void main(String args[]) { SpringApplication.run(SecurityServer.class,args); } @Override public Health health() { return Health.up().withDetail("STATUS", "SUCCESS").build(); } } instanceId: ${spring.cloud.client.hostname}:${spring.application.name}:${spring.application.instance_id:${random.uuid}} Can you help me with the zuul & instances configuration, so that request is automatically forwarded to the other available instances when an instance goes down.