변경:

  • org.hibernate:hibernate-validator:5.4.0.Final → org.hibernate:hibernate-validator:5.3.6.Final

  • javax.el:javax.el-api:2.2.5 → org.glassfish:javax.el

해결방법힌트:

spring-boot.1.5.1 Reference document 에 기재된 버전에 맞춤

문제발생지점:

java.lang.IllegalStateException: Failed to load ApplicationContext
     at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
     at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
     at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189)
     at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131)
     at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
     at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
     at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
     at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
     at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
     at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
     at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
     at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
     at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
     at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:114)
     at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:57)
     at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:66)
     at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:498)
     at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
     at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
     at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
     at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
     at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
     at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:109)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:498)
     at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
     at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
     at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:377)
     at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
     at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
     at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerAdapter' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Factory method 'requestMappingHandlerAdapter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcValidator' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.Validator]: Factory method 'mvcValidator' threw exception; nested exception is javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead
     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866)
     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542)
     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737)
     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370)
     at org.springframework.boot.SpringApplication.run(SpringApplication.java:314)
     at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:120)
     at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
     at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
     ... 45 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Factory method 'requestMappingHandlerAdapter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcValidator' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.Validator]: Factory method 'mvcValidator' threw exception; nested exception is javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead
     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
     ... 62 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcValidator' defined in class path resource [org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.Validator]: Factory method 'mvcValidator' threw exception; nested exception is javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead
     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
     at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:381)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c.mvcValidator(<generated>)
     at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.getConfigurableWebBindingInitializer(WebMvcConfigurationSupport.java:567)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration.getConfigurableWebBindingInitializer(WebMvcAutoConfiguration.java:410)
     at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.requestMappingHandlerAdapter(WebMvcConfigurationSupport.java:526)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration.requestMappingHandlerAdapter(WebMvcAutoConfiguration.java:372)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c.CGLIB$requestMappingHandlerAdapter$3(<generated>)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c$$FastClassBySpringCGLIB$$bbc0971f.invoke(<generated>)
     at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
     at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c.requestMappingHandlerAdapter(<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:498)
     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
     ... 63 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.validation.Validator]: Factory method 'mvcValidator' threw exception; nested exception is javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead
     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
     at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
     ... 87 more
Caused by: javax.validation.ValidationException: HV000183: Unable to initialize 'javax.el.ExpressionFactory'. Check that you have the EL dependencies on the classpath, or use ParameterMessageInterpolator instead
     at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.buildExpressionFactory(ResourceBundleMessageInterpolator.java:102)
     at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.<init>(ResourceBundleMessageInterpolator.java:45)
     at org.springframework.validation.beanvalidation.LocalValidatorFactoryBean$HibernateValidatorDelegate.buildMessageInterpolator(LocalValidatorFactoryBean.java:418)
     at org.springframework.validation.beanvalidation.LocalValidatorFactoryBean.setValidationMessageSource(LocalValidatorFactoryBean.java:160)
     at org.springframework.web.servlet.config.annotation.WebMvcConfigurerComposite.getValidator(WebMvcConfigurerComposite.java:165)
     at org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration.getValidator(DelegatingWebMvcConfiguration.java:137)
     at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.mvcValidator(WebMvcConfigurationSupport.java:614)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c.CGLIB$mvcValidator$41(<generated>)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c$$FastClassBySpringCGLIB$$bbc0971f.invoke(<generated>)
     at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
     at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356)
     at org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$c8b21c0c.mvcValidator(<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:498)
     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
     ... 88 more
Caused by: javax.el.ELException: Provider com.sun.el.ExpressionFactoryImpl not found
     at javax.el.FactoryFinder.newInstance(FactoryFinder.java:101)
     at javax.el.FactoryFinder.find(FactoryFinder.java:197)
     at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:189)
     at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:160)
     at org.hibernate.validator.messageinterpolation.ResourceBundleMessageInterpolator.buildExpressionFactory(ResourceBundleMessageInterpolator.java:98)
     ... 105 more
Caused by: java.lang.ClassNotFoundException: com.sun.el.ExpressionFactoryImpl
     at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
     at javax.el.FactoryFinder.newInstance(FactoryFinder.java:87)
     ... 109 more


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javax.validation.ValidationException: HV000041: Call to TraversableResolver.isReachable()

문제가 생긴 것은 애플리케이션 구동 후에 데이터베이스 정보를 새롭게 추가하거나 갱신할 때javax.validation.ValidationException: HV000041: Call to TraversableResolver.isReachable() 에러가 발생했다.

Spring Boot 1.4.2.RELEASE 를 기반으로 해서 bootRepackage 로 빌드한 jar 파일을 서버에서 직접 실행할 때 다음과 같은 에러가 발생했다.

javax.validation.ValidationException
javax.validation.ValidationException: HV000041: Call to TraversableResolver.isReachable() threw an exception. at org.hibernate.validator.internal.engine.ValidatorImpl.isReachable(ValidatorImpl.java:1621) at org.hibernate.validator.internal.engine.ValidatorImpl.isValidationRequired(ValidatorImpl.java:1597) at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:609) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:580) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:524) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:492) at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:457) at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:407) at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:205) at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:110) at org.springframework.validation.DataBinder.validate(DataBinder.java:866)
...
Caused by: java.io.FileNotFoundException: JAR entry !/META-INF/services/javax.persistence.spi.PersistenceProvider
...

javax.validation.ValidationException: HV000041: Call to TraversableResolver.isReachable() Caused by: java.io.FileNotFoundException: JAR entry !/META-INF/services/javax.persistence.spi.PersistenceProvider

이런 때는 검색. 그 결과 찾은 것이 아래 링크다.

Error after upgrade to SB 1.4.2 - java.io.FileNotFoundException: JAR entry !/META-INF/services/javax.validation.spi.ValidationProvider #7360

정리하자면 톰캣과 관련된 에러로 보인다. Tomcat 8.5.5 and Tomcat 8.5.6

이걸 해결하는 버전으로 1.4.3 에서 tomcat 8.5.9 버전을 적용했지만

이와 관련된 문제를 해결한건 Tomcat 8.5.10 으로 보인다. 그래서 스프링부트 개발팀에서 Tomcat 8.5.11 로 변경한 1.4.4.RELEASE 으로 변경하니 정상적으로 동작한다.


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2016/11/08 에 Spring Boot 1.4.2 Available Now 가 출시되었다.over 100 fixes, improvements and 3rd party dependency updates 100 여개의 결함을 수정하고 구현하고, 서드파티에 대한 의존성 업데이트가 있었다고 한다.

그와 관련된 변화 중 하나가 spring-boot 라는 플러그인 아이디가org.springframework.boot 로 변경되었다.

이와 관련된 정보는 프로젝트 빌드를 실행해보면,

...
The plugin id 'spring-boot' is deprecated. Please use 'org.springframework.boot' instead.
...

와 같은 메시지가 출력되는 것을 확인했다. 이에 대한 정보를 찾아보았다. 이에 대해서 정보를 찾아보던 중에

64. Spring Boot Gradle plugin 페이지에서 힌트를 발견했다.

buildscript {
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:1.4.2.RELEASE")
    }
}
apply plugin: 'org.springframework.boot'

와 같은 형태로 되어 있는 것을 확인했다. 내가 사용하고 있는 build.gradle 에는 다음과 같이 선언되어 있다.

buildscript {
    ext {
        springBootVersion = '1.4.2.RELEASE'
    }
    repositories {
        jcenter()
        maven { url "https://repo.spring.io/snapshot" }
        maven { url "https://repo.spring.io/milestone" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'spring-boot'
apply plugin: 'spring-boot' 만 apply plugin: 'org.springframework.boot'으로 변경하면 된다.

해결책

buildscript {
    ext {
        springBootVersion = '1.4.2.RELEASE'
    }
    repositories {
        jcenter()
        maven { url "https://repo.spring.io/snapshot" }
        maven { url "https://repo.spring.io/milestone" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'org.springframework.boot'
잘 찾았길 바란다.


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스프링부트 기본 에러페이지는 ‘whitelabel’ error page 이다. 이와 관련된 내용은 ErrorMvcAutoConfiguration 을 살펴보면 찾아볼 수 있다.

private final SpelView defaultErrorView = new SpelView(
	"<html><body><h1>Whitelabel Error Page</h1>"
			+ "<p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p>"
			+ "<div id='created'>${timestamp}</div>"
			+ "<div>There was an unexpected error (type=${error}, status=${status}).</div>"
			+ "<div>${message}</div></body></html>");

이 기본적인 화이트레이블 페이지 대신에 사용자가 지정한 에러페이지로 변경이 가능하다. 이를 위해서는

server.error.include-stacktrace=never # When to include a "stacktrace" attribute.
server.error.path=/error # Path of the error controller.
server.error.whitelabel.enabled=true # Enable the default error page displayed in browsers in case of a server error.

위 세가지 속성에 대한 조작을 해야 한다. 우선 사용자지정 에러페이지를 사용하기 위해서는 화이트레이블 출력을 비활성화해야 한다.

server.error.whitelabel.enabled=false

로 변경한다. 그리고 에러페이지에서 발생한 에러의 스택트레이스를 출력하기 위해서는 server.error.include-stacktrace 을 never 이외의 것으로 변경해야 한다.

server.error.include-stacktrace=always or on_trace_param

이와 관련된 값은 ErrorProperties 를 살펴보면 된다.

사용가능한 속성들을 템플릿(Thymeleaf) 에 적용해본 예다.

<div class="container error-404">
    <h1 th:text="${status}">Status</h1>
    <h2>Houston, we have a problem([[${error}]])</h2>
    <p th:text="${message}"> Error Message</p>
    <p>
        <a href="index.html" th:href="@{/}" class="btn red btn-outline"> Return home </a>
        <br>
    </p>
    <div>
        <label>Time Stamp</label>
        <div th:text="${timestamp}"></div>
    </div>
    <div>
        <label>Exception name</label>
        <div th:text="${exception}"></div>
    </div>
    <div>
        <label>Trace</label>
        <div th:utext="${trace}"></div>
    </div>
</div>

화면에 출력가능한 속성값들에 대해서는 DefaultErrorAttributes 를 살펴보면 이용할 수 있는 정보를 확인가능하다. 그러면 다음과 같은 화면을 볼 수 있게 된다.



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http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/

거의... 이 녀석을 기반으로 작성할 건데....

... 다뤄야할 내용이 많다... ㅡ_-);;

... 하기 싫어진다(두렵다).


내 책 이름은... '부트 스프링 부트(boot spring boot)'

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