Spring-boot: Enable Spring Data REST JSR-303 Web Validation

[SingleShot]

Using JSR-303 annotations and Spring Data REST, validation is only done at persistence time, and generates HTTP status 500 upon validation failure. I suggest it should be enabled at the web layer as well by default so 400's can be generated. The same has been requested of DATAREST-370, but this seems like something boot should do either way in the spirit of default common settings, and allowing those settings to be disabled via a property rather than writing boilerplate configuration files. Thanks!

[wilkinsona]

I suspect there's good reason why this hasn't been done in Spring Data REST itself. /cc @olivergierke

[WhatAKitty]

Watting for it. And is there anyway to solve it? @olivergierke

[snicoll]

@WhatAKitty feel free to use the github reaction feature rather than "+1 comment", thanks.

[WhatAKitty]

@snicoll Ok, I will.

[odrotbohm]

There has. I'd argue neither Boot nor Spring Data REST should enable that by default, because it's a bad default. JSR-303 make sense on DTOs but not on domain classes as it creates incentives to replace what have should a proper value type with a low level type + an annotation, e.g. @Email String email. That's dangerous as code using types designed in such way can never actually be sure the validation has been applied. You're basically working around the type system in a way here. With DTOs that's not a problem, as you have a dedicated translation step in which you apply the strict checks, but without those, you're basically forced to sacrifice important parts of your domain design — the enforcement of invariants and domain-appropriate abstractions.

I see that the problem with my suggestion currently is that Jackson basically aborts deserialization on the very first problem so that the proper way of designing domain types — enforcing invariants in a constructor and rejecting invalid values by throwing an exception — does not give the nice "I collect all problems and report them as one" you might expect.

To accommodate that and actually make the better design approach less of a PITA, we're currently looking into how to leverage the improved DeserializationproblemHandler API in Jackson 2.8.

So my vote here is to do just nothing. There is a way to activate JSR-303 if people despite the implications want to pursue that route, but I'd vote to not make the worse approach the default one.

[wilkinsona]

Thanks for explaining the rationale behind the current default, @olivergierke. I agree that we shouldn't change this in Boot.

[WhatAKitty]

@olivergierke Thanks, But I still have no idea about domain validation after I have tried so many ways. And according your saying, should I do nothing about validation of domain and let it throw 500 internal server error continuely?

[SingleShot]

@WhatAKitty If you want JSR-303 validation on objects coming into your controllers, you can turn that on as describe in DATAREST-370.

[WhatAKitty]

@SingleShot Thanks,In DATAREST-370, I cannot find any solution about enable JSR-303 validation.

[WhatAKitty]

@SingleShot Follow the steps in DATAREST-370, I got an error:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customRepositoryRestMvcConfiguration': Unsatisfied dependency expressed through field 'validator': Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration': Unsatisfied dependency expressed through method 'setConfigurers' parameter 0: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration': Unsatisfied dependency expressed through method 'setConfigurers' parameter 0: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:569) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:372) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:240) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:697) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:526) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at com.gnet.Application.main(Application.java:10) [classes/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration': Unsatisfied dependency expressed through method 'setConfigurers' parameter 0: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:648) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:349) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:372) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:207) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1054) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:566) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 28 common frames omitted
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Unsatisfied dependency expressed through constructor parameter 3: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:207) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1120) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1049) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:640) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 51 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:279) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:372) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:207) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1054) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1019) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 66 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:154) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:122) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:271) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 89 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jacksonHttpMessageConverter' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:207) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1214) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveMultipleBeans(DefaultListableBeanFactory.java:1120) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1049) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.getIfAvailable(DefaultListableBeanFactory.java:1576) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration.<init>(HttpMessageConvertersAutoConfiguration.java:61) ~[spring-boot-autoconfigure-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration$$EnhancerBySpringCGLIB$$e25d6d01.<init>(<generated>) ~[spring-boot-autoconfigure-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_101]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_101]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_101]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_101]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 91 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'jacksonHttpMessageConverter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 111 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [com/gnet/CustomRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:381) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c.config(<generated>) ~[classes/:na]
    at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.jacksonHttpMessageConverter(RepositoryRestMvcConfiguration.java:456) ~[spring-data-rest-webmvc-2.5.2.RELEASE.jar:na]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c.CGLIB$jacksonHttpMessageConverter$19(<generated>) ~[classes/:na]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c$$FastClassBySpringCGLIB$$43da63dd.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c.jacksonHttpMessageConverter(<generated>) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 112 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Circular reference involving containing bean 'customRepositoryRestMvcConfiguration' - consider declaring the factory method as static for independence from its containing instance. Factory method 'config' threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 133 common frames omitted
Caused by: java.lang.NullPointerException: null
    at org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration.config(RepositoryRestMvcConfiguration.java:269) ~[spring-data-rest-webmvc-2.5.2.RELEASE.jar:na]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c.CGLIB$config$1(<generated>) ~[classes/:na]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c$$FastClassBySpringCGLIB$$43da63dd.invoke(<generated>) ~[classes/:na]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    at com.gnet.CustomRepositoryRestMvcConfiguration$$EnhancerBySpringCGLIB$$90ae3b3c.config(<generated>) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.2.RELEASE.jar:4.3.2.RELEASE]
    ... 134 common frames omitted

[ptahchiev]

@WhatAKitty Are you using Hopper? I think you might be hitting https://jira.spring.io/browse/DATAREST-866
In Hopper I also get a null-pointer exception when I try to inject mvcValidator.

[WhatAKitty]

@ptahchiev What's Hopper? I think I don't use it. Maybe this error is caused by static modifier.But when I add static , the IDE give me the error "Illegal modifier for the class CustomRepositoryRestMvcConfiguration; only public, abstract & final are permitted"

[ptahchiev]

@WhatAKitty Which version of Spring-data-rest are you using?

[WhatAKitty]

@ptahchiev

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.0.RELEASE</version>
    </parent>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.security.oauth</groupId>
            <artifactId>spring-security-oauth2</artifactId>
        </dependency>

[ptahchiev]

Yes, you are using Hopper.

[WhatAKitty]

@ptahchiev Hopper means? And what I can do?

[ptahchiev]

@WhatAKitty It's a release train version: https://spring.io/blog/2016/06/15/spring-data-release-train-hopper-sr2-released

[WhatAKitty]

@ptahchiev Oh, I get. And then how can I fix that error in this version.

[odrotbohm]

You might wanna take this to the Gitter channel. This is the Boot tracker and we shouldn't create a lot of buzz with what's actually a discussion. Thanks!

[xenoterracide]

IMHO, in Spring Data REST, because it serializes entities directly an entity is a DTO, there is no separate object. IMHO A DTO is any object that is used for marshalling http://martinfowler.com/eaaCatalog/dataTransferObject.html, this object can be seperate from the entity, but in Spring Data REST it is not, and as far as I know cannot be. You can make it separate writing your own rest controllers but spring Data REST provides those controllers for you.

In fact the very reason I would argue against Spring Data REST is that this separation is gone, and changing your entities will change your API.

http://stackoverflow.com/a/35338751/206466 < here's where I figured out the answer for how to do this simply.

[ghost]

I had the same circular dependency with spring-data-rest and JSR303 validator, I did not got too deep in the investigation why but as a quick fix, I used lazy autowiring on the Validator:

@Configuration
public class RestConfiguration extends RepositoryRestConfigurerAdapter {

    @Autowired
    @Lazy
    private Validator validator;

    @Override
    public void configureValidatingRepositoryEventListener(ValidatingRepositoryEventListener validatingListener) {
        validatingListener.addValidator("beforeCreate", validator);
    }
}

[ignaciolarranaga]

Team, this (validatingListener.addValidator("beforeCreate", validator);) doesn't really fully work because the validation only manages the entities. So if you try for example to put a validation on a non-entity you get a nasty error saying org.springframework.beans.NotReadablePropertyException: Invalid property '...' of bean class [... the non-entity one ...]: Bean property '....' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

While obviously more laborious you can perform the validation directly on the Validator manually, e.g:

@Component("beforeSaveListingValidator")
public class BeforeSaveListingValidator implements Validator {

    @Autowired
    private LocalValidatorFactoryBean validator;

    @Override
    public void validate(Object object, Errors errors) {
        BindingResult bindingResult = new BeanPropertyBindingResult(object, errors.getObjectName());
        validator.validate(object, bindingResult);
        errors.addAllErrors(bindingResult);