using "Camden.SR5" for spring-cloud dependencies, with spring boot '1.5.2.RELEASE'.
In my current setup, I have
- eureka server
- config server (works on random ports)
- zuul gateway server
- and 2 service instances (runs on random ports)
All of these instances are successfully registered with Eureka.
When all services are running, load balancing is done properly through zuul without any problems.
when the instance is killed, Zuul is still trying to fulfill the request using the same service that is not working. However, waiting for the eureka registry to be retrieved after the instance is closed, requests are executed with other instances that 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]
zuul, @EnableZuulProxy @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
@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}}
zuul , , .