I am trying to do the Spring Cloud Contract integration in our existing project. I have got the stub verifier working. But when i am trying use that stub in client, I am getting the following exception. I am trying to get this working offline. Please let me know if you need any more details on the same.
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-07-10 15:26:42.330 ERROR 20476 [] --- [main] o.s.boot.SpringApplication - Application startup failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'stubFlowRegistrar' defined in class path resource [org/springframework/cloud/contract/stubrunner/messaging/integration/StubRunnerIntegrationConfiguration.class]: Unsatisfied dependency expressed through method 'stubFlowRegistrar' parameter 1; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'batchStubRunner' defined in class path resource [org/springframework/cloud/contract/stubrunner/spring/StubRunnerConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.contract.stubrunner.BatchStubRunner]: Factory method 'batchStubRunner' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:350)
at org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:1021)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'batchStubRunner' defined in class path resource [org/springframework/cloud/contract/stubrunner/spring/StubRunnerConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.contract.stubrunner.BatchStubRunner]: Factory method 'batchStubRunner' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1134)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1064)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741)
... 47 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.contract.stubrunner.BatchStubRunner]: Factory method 'batchStubRunner' threw exception; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
... 60 common frames omitted
Caused by: java.lang.NullPointerException: null
at org.springframework.cloud.contract.stubrunner.AetherFactories.newSession(AetherFactories.java:63)
at org.springframework.cloud.contract.stubrunner.AetherStubDownloader.<init>(AetherStubDownloader.java:83)
at org.springframework.cloud.contract.stubrunner.StubDownloaderBuilderProvider.getOrDefaultDownloader(StubDownloaderBuilderProvider.java:48)
at org.springframework.cloud.contract.stubrunner.spring.StubRunnerConfiguration.batchStubRunner(StubRunnerConfiguration.java:75)
at org.springframework.cloud.contract.stubrunner.spring.StubRunnerConfiguration$$EnhancerBySpringCGLIB$$52aa72bb.CGLIB$batchStubRunner$0(<generated>)
at org.springframework.cloud.contract.stubrunner.spring.StubRunnerConfiguration$$EnhancerBySpringCGLIB$$52aa72bb$$FastClassBySpringCGLIB$$35176646.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356)
at org.springframework.cloud.contract.stubrunner.spring.StubRunnerConfiguration$$EnhancerBySpringCGLIB$$52aa72bb.batchStubRunner(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
... 61 common frames omitted
2017-07-10 15:26:42.332 ERROR 20476 [] --- [main] o.s.test.context.TestContextManager - Caught exception while allowing TestExecutionListener
Most likely the problem was related to Aether version mismatch. It's enough to bump version to Edgware release train where we've managed to shade Aether and finally Stub Runner is independent on the used Aether version.