'setReadTimeout(int)' is deprecated and marked for removal 해결

 

1. 문제

RestTemplate를 사용할 때, 연결 타임아웃 시간과 읽기 타임아웃 시간은 기본적으로 셋팅하게 됩니다. 

하지만 spring 6.0 부터는 RestTemplate를 설정할 때, HttpComponentsClientHttpRequestsFactory()에서 setReadTimeout() 메서드를 사용할 수 없습니다.

org.springframework.http.client.HttpComponentsClientHttpRequestFactory

 

 

2. 해결

RestTemplateBuilder를 사용하면 해당 문제를 해결 할 수 있습니다.

@Bean("restTemplateCustom")
fun restTemplate(builder: RestTemplateBuilder): RestTemplate {
    return builder.requestFactory { settings ->
                       BufferingClientHttpRequestFactory(
                           ClientHttpRequestFactories.get(HttpComponentsClientHttpRequestFactory::class.java, settings)
                       )
                   }
                  .setConnectTimeout(Duration.ofSeconds(300))
                  .setReadTimeout(Duration.ofSeconds(300))
                  .build()
}

 

이렇게 설정하고 부트를 재시작하면 또 아래와 같은 에러를 만나게 됩니다.

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'restTemplateCustom' defined in class path resource [com/mybookgal/mybookgallery/configuration/RestTemplateConfig.class]: Failed to instantiate [org.springframework.web.client.RestTemplate]: Factory method 'restTemplate' threw exception with message: org/apache/hc/client5/http/socket/LayeredConnectionSocketFactory
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:659) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:647) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1332) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1162) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:560) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:520) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1417) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1337) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:888) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-6.0.11.jar:6.0.11]
	... 24 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.client.RestTemplate]: Factory method 'restTemplate' threw exception with message: org/apache/hc/client5/http/socket/LayeredConnectionSocketFactory
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:171) ~[spring-beans-6.0.11.jar:6.0.11]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:655) ~[spring-beans-6.0.11.jar:6.0.11]
	... 38 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/apache/hc/client5/http/socket/LayeredConnectionSocketFactory
	at org.springframework.boot.web.client.ClientHttpRequestFactories.get(ClientHttpRequestFactories.java:124) ~[spring-boot-3.1.3.jar:3.1.3]
	at com.mybookgal.mybookgallery.configuration.RestTemplateConfig.restTemplate$lambda$0(RestTemplateConfig.kt:19) ~[main/:na]
	at org.springframework.boot.web.client.RestTemplateBuilder.buildRequestFactory(RestTemplateBuilder.java:662) ~[spring-boot-3.1.3.jar:3.1.3]
	at org.springframework.boot.web.client.RestTemplateBuilder.configure(RestTemplateBuilder.java:628) ~[spring-boot-3.1.3.jar:3.1.3]
	at org.springframework.boot.web.client.RestTemplateBuilder.build(RestTemplateBuilder.java:603) ~[spring-boot-3.1.3.jar:3.1.3]
	at com.mybookgal.mybookgallery.configuration.RestTemplateConfig.restTemplate(RestTemplateConfig.kt:24) ~[main/:na]
	at com.mybookgal.mybookgallery.configuration.RestTemplateConfig$$SpringCGLIB$$0.CGLIB$restTemplate$0(<generated>) ~[main/:na]
	at com.mybookgal.mybookgallery.configuration.RestTemplateConfig$$SpringCGLIB$$2.invoke(<generated>) ~[main/:na]
	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:258) ~[spring-core-6.0.11.jar:6.0.11]
	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331) ~[spring-context-6.0.11.jar:6.0.11]
	at com.mybookgal.mybookgallery.configuration.RestTemplateConfig$$SpringCGLIB$$0.restTemplate(<generated>) ~[main/:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
	at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:139) ~[spring-beans-6.0.11.jar:6.0.11]
	... 39 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.hc.client5.http.socket.LayeredConnectionSocketFactory
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
	... 55 common frames omitted

이 이유는 위에서 javadoc의 클래스 이름들이 빨간색으로 나오는 이유와 동일합니다. 말 그대로 클래스를 찾을 수 없는 상태입니다. 

`HttpComponentsClientHttpRequestFactory`를 들어가보면..

Apche HttpComponents 5.1 이상의 버전이 필요하다고 나와있습니다.

build.gradle.kts에 의존성을 추가해주겠습니다.

implementation("org.apache.httpcomponents.client5:httpclient5:5.2.1")

https://mvnrepository.com/artifact/org.apache.httpcomponents.client5/httpclient5

 

gradle 새로고침을 하고나면, 다음과 같이 라이브러리를 불러온 것을 확인할 수 있습니다.

다시 부트를 재시작하면 정상적으로 시작됨을 확인 할 수 있습니다. 

3. 링크

해당 문제에 대한 spring-boot issue 링크입니다.

https://stackoverflow.com/questions/75242683/i-am-migrating-spring-boot-version-2-7-3-to-spring-boot-3-0-0-so-existing-code-i

I am migrating spring boot version 2.7.3 to spring-boot 3.0.0 so existing code is breaking related to HttpClients

https://github.com/spring-projects/spring-boot/issues/35658

RestTemplate builder: HttpComponentsClientHttpRequestFactory has the setReadTimeout method marked as deprecated · Issue #35658