Spring-hateoas: Wrong RequestMappingHandlerAdapter getting loaded

[srinireddya]

I am using webflux in the project and integrating spring hateoas to mine.

Added latest spring hateoas version.

    <dependency>
        <groupId>org.springframework.hateoas</groupId>
        <artifactId>spring-hateoas</artifactId>
        <version>1.0.0.M2</version>
     </dependency>

Spring hateoas is looking for org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter instead of org.springframework.web.reactive.result.method.annotation.RequestMappingHandlerAdapter

Below is the exception trace

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'halMessageConverterSupportedMediaTypeCustomizer': Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:160) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:414) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1775) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:868) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:67) ~[spring-boot-2.2.0.M3.jar:2.2.0.M3]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:782) [spring-boot-2.2.0.M3.jar:2.2.0.M3]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:404) [spring-boot-2.2.0.M3.jar:2.2.0.M3]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:319) [spring-boot-2.2.0.M3.jar:2.2.0.M3]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1275) [spring-boot-2.2.0.M3.jar:2.2.0.M3]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1263) [spring-boot-2.2.0.M3.jar:2.2.0.M3]
    at com.deere.onecloud.sample.SampleApplication.main(SampleApplication.java:17) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.0.M3.jar:2.2.0.M3]
Caused by: java.lang.NoClassDefFoundError: org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerAdapter
    at org.springframework.boot.autoconfigure.hateoas.HypermediaHttpMessageConverterConfiguration$HalMessageConverterSupportedMediaTypesCustomizer.configureHttpMessageConverters(HypermediaHttpMessageConverterConfiguration.java:70) ~[spring-boot-autoconfigure-2.2.0.M3.jar:2.2.0.M3]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_73]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_73]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_73]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_73]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:389) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:333) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:157) ~[spring-beans-5.2.0.M2.jar:5.2.0.M2]
    ... 23 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_73]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_73]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_73]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_73]
    ... 31 common frames omitted

[Cepr0]

I have been able to avoid this error by excluding HypermediaAutoConfiguration:

@EnableHypermediaSupport(type = HAL)
@SpringBootApplication(exclude = HypermediaAutoConfiguration.class)
public class Application {
    //...
}

and spring-boot-starter-web:

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-hateoas</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-web</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

[odrotbohm]

You should also be able to use the stacks() property introduced for #973. It allows to limit the application of customizations to a certain stack. I've filed spring-projects/spring-boot#17140 to fix the Spring Boot starter for HATEOAS that currently pulls in the servlet based web starter.

[odrotbohm]

Closing this as works as designed as this is a problem caused by downstream projects and will be resolved by them eventually.