I'm trying to add Feign and Hystrix to my existing Spring Boot project.
I added these two dependencies to pom.xml:
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<version>${spring-cloud.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
<version>${spring-cloud.version}</version>
</dependency>
The project compiles, but when I start the server, I get this exception:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cloud.netflix.feign.ribbon.FeignRibbonClientAutoConfiguration$OkHttpConfiguration': Post-processing failed of bean type [class org.springframework.cloud.netflix.feign.ribbon.FeignRibbonClientAutoConfiguration$OkHttpConfiguration$$EnhancerBySpringCGLIB$$3ecc7446] failed; nested exception is java.lang.IllegalStateException: Failed to introspect bean class [org.springframework.cloud.netflix.feign.ribbon.FeignRibbonClientAutoConfiguration$OkHttpConfiguration$$EnhancerBySpringCGLIB$$3ecc7446] for persistence metadata: could not find class that it depends on
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:945) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:751) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:761) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:371) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
at com.ifood.next.NextApplication.main(NextApplication.java:27) [classes/:?]
Caused by: java.lang.ClassNotFoundException: com.squareup.okhttp.OkHttpClient
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_101]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_101]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[?:1.8.0_101]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_101]
at java.lang.Class.getDeclaredFields0(Native Method) ~[?:1.8.0_101]
at java.lang.Class.privateGetDeclaredFields(Class.java:2583) ~[?:1.8.0_101]
at java.lang.Class.getDeclaredFields(Class.java:1916) ~[?:1.8.0_101]
at org.springframework.util.ReflectionUtils.getDeclaredFields(ReflectionUtils.java:713) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.util.ReflectionUtils.doWithLocalFields(ReflectionUtils.java:655) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:418) ~[spring-orm-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:397) ~[spring-orm-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(PersistenceAnnotationBeanPostProcessor.java:333) ~[spring-orm-4.3.3.RELEASE.jar:4.3.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:940) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
... 16 more
I have tried version 1.1.5.RELEASE and 1.2.3.RELEASE, both give me the same error.
So apparently, it depends on an old version of OKHttp? The current version is com.squareup.okhttp3.OkHttpClient
Am I missing more dependencies? It's hard to find examples and tutorials for these modules as they're quite new.
It seems that Spring Cloud Feign uses OpenFeign which has been upgraded to use OkHttp3 in this commit (https://github.com/OpenFeign/feign/commit/3d84c767ba464b2a75e3e1e6c002b0173da268f1). You can try to force newer version of https://github.com/OpenFeign/feign and see if that helps.
Looking at the dependencies on https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-starter-ribbon/1.2.3.RELEASE it seems that version 2.2.0 of Netflix Libraries is used and it was released in April 2016 - a month before the commit in which OkHttp was upgraded to version 3.
Try to force version 2.2.2.