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sample microservices demonstrating usage of such Spring Cloud components and mechanisms like Eureka (service discovery), Ribbon (client-side load balancer), Feign (HTTP client), Hystrix (circuit breaker and fallback), Zuul (proxy/api gateway)

Java 100.00%
spring-boot spring-cloud spring-cloud-netflix spring-cloud-netflix-zuul eureka eureka-client eureka-service-discovery feign-client openfeign zuul circuit-breaker hystrix turbine ribbon spring-cloud-ribbon

sample-spring-cloud-comm's Introduction

Mastering Spring Cloud Twitter

⚠️ This repository contains examples of Spring Boot 1.5 and won't be updated and has been moved to the archived state. If you are looking for the repository with the latest versions of Spring Boot/Spring Cloud related to the you can refer the following repository: https://github.com/piomin/sample-spring-microservices-new. It is automatically updated to the latest versions of all frameworks and libraries.

This repository is an example of application created for a demo of content described in my book: Mastering Spring Cloud

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sample-spring-cloud-comm's Issues

"exception":"org.springframework.web.client.ResourceAccessException","message":"I/O error on GET request for \"http://customer-service/withAccounts/1\

I am getting below error when I called the curl command -

$ curl -d '{"productIds": [1,5],"customerId": 1,"status": "NEW"}' -H "Content-Type: application/json" -X POST http://localhost:8090
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   394    0   341  100    53    183     28  0:00:01  0:00:01 --:--:--   211{"timestamp":1540360067644,"status":500,"error":"Internal Server Error","exception":"org.springframework.web.client.ResourceAccessException","message":"I/O error on GET request for \"http://customer-service/withAccounts/1\": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect","path":"/"}

Error below -

},Server stats: [[Server:localhost:8092;	Zone:UNKNOWN;	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:com.netflix.loadbalancer.ConfigurationBasedServerList@195f5e36
2018-10-24 11:17:47.037  INFO 16508 --- [erListUpdater-0] c.netflix.config.ChainedDynamicProperty  : Flipping property: product-service.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2018-10-24 11:17:47.616  INFO 16508 --- [erListUpdater-1] c.netflix.config.ChainedDynamicProperty  : Flipping property: customer-service.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2018-10-24 11:17:47.642 ERROR 16508 --- [nio-8090-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://customer-service/withAccounts/1": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect] with root cause

java.net.ConnectException: Connection refused: connect
	at java.net.DualStackPlainSocketImpl.connect0(Native Method) ~[na:1.8.0_162]
	at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) ~[na:1.8.0_162]
	at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) ~[na:1.8.0_162]
	at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) ~[na:1.8.0_162]
	at java.net.AbstractPlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_162]
	at java.net.PlainSocketImpl.connect(Unknown Source) ~[na:1.8.0_162]
	at java.net.SocksSocketImpl.connect(Unknown Source) ~[na:1.8.0_162]
	at java.net.Socket.connect(Unknown Source) ~[na:1.8.0_162]
	at java.net.Socket.connect(Unknown Source) ~[na:1.8.0_162]
	at sun.net.NetworkClient.doConnect(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.http.HttpClient.openServer(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.http.HttpClient.openServer(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.http.HttpClient.<init>(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.http.HttpClient.New(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.http.HttpClient.New(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) ~[na:1.8.0_162]
	at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source) ~[na:1.8.0_162]
	at org.springframework.http.client.SimpleBufferingClientHttpRequest.executeInternal(SimpleBufferingClientHttpRequest.java:78) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:99) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.cloud.client.loadbalancer.LoadBalancerRequestFactory$1.apply(LoadBalancerRequestFactory.java:63) ~[spring-cloud-commons-1.2.4.RELEASE.jar:1.2.4.RELEASE]
	at org.springframework.cloud.client.loadbalancer.LoadBalancerRequestFactory$1.apply(LoadBalancerRequestFactory.java:52) ~[spring-cloud-commons-1.2.4.RELEASE.jar:1.2.4.RELEASE]
	at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:98) ~[spring-cloud-netflix-core-1.3.5.RELEASE.jar:1.3.5.RELEASE]
	at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.execute(RibbonLoadBalancerClient.java:80) ~[spring-cloud-netflix-core-1.3.5.RELEASE.jar:1.3.5.RELEASE]
	at org.springframework.cloud.client.loadbalancer.LoadBalancerInterceptor.intercept(LoadBalancerInterceptor.java:55) ~[spring-cloud-commons-1.2.4.RELEASE.jar:1.2.4.RELEASE]
	at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:86) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:70) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:652) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:613) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:287) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at pl.piomin.services.order.controller.OrderController.prepare(OrderController.java:34) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_162]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_162]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_162]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_162]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar:4.3.10.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_162]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_162]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.16.jar:8.5.16]
	at java.lang.Thread.run(Unknown Source) [na:1.8.0_162]

feign_with_discovery - Not able to start the server

I'm unable to start the server - Only 1st instance of the service is getting started.. For all other services, its saying address is used, not sure why all services are looking for the 8080.

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
13:03:48.896 ERROR 

***************************
APPLICATION FAILED TO START
***************************

Description:

The Tomcat connector configured to listen on port 8080 failed to start. The port may already be in use or the connector may be misconfigured.

Action:

Verify the connector's configuration, identify and stop any process that's listening on port 8080, or configure this application to listen on another port.

13:03:48.897 INFO  Closing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@74cec793: startup date [Wed Oct 24 13:03:42 IST 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@3a7442c7
13:03:48.898 INFO  Unregistering application product-service with eureka with status DOWN
13:03:48.898 WARN  Saw local status change event StatusChangeEvent [timestamp=1540366428898, current=DOWN, previous=UP]
13:03:48.899 INFO  DiscoveryClient_PRODUCT-SERVICE/841DTN2.corp.mastercard.org:product-service: registering service...
13:03:48.900 INFO  Stopping beans in phase 0
13:03:48.905 INFO  DiscoveryClient_PRODUCT-SERVICE/841DTN2.corp.mastercard.org:product-service - registration status: 204
13:03:49.145 INFO  Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@43f203c7: startup date [Wed Oct 24 13:03:49 IST 2018]; parent: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@74cec793
13:03:49.193 INFO  JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
13:03:49.359 INFO  Flipping property: localhost.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
13:03:49.371 INFO  Shutdown hook installed for: NFLoadBalancer-PingTimer-localhost
13:03:49.391 INFO  Client: localhost instantiated a LoadBalancer: DynamicServerListLoadBalancer:{NFLoadBalancer:name=localhost,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:null
13:03:49.397 INFO  Using serverListUpdater PollingServerListUpdater
13:03:49.400 INFO  DynamicServerListLoadBalancer for client localhost initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=localhost,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:org.springframework.cloud.netflix.ribbon.eureka.DomainExtractingServerList@6b0fff35
13:03:49.904 INFO  Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@43f203c7: startup date [Wed Oct 24 13:03:49 IST 2018]; parent: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@74cec793
13:03:49.905 INFO  Shutdown hook removed for: NFLoadBalancer-PingTimer-localhost
13:03:49.908 INFO  Unregistering JMX-exposed beans on shutdown
13:03:49.908 INFO  Unregistering JMX-exposed beans
13:03:49.909 INFO  Shutting down DiscoveryClient ...
13:03:49.909 INFO  Unregistering ...
13:03:49.915 INFO  DiscoveryClient_PRODUCT-SERVICE/841DTN2.corp.mastercard.org:product-service - deregister  status: 200
13:03:49.922 INFO  Completed shut down of DiscoveryClient
13:03:49.925 INFO  Shutting down the Executor Pool for PollingServerListUpdater

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