从Spring Boot 2.1.9升级到2.2.1（Spring集成）后的ClassCastException

问题描述 投票：1回答：1

我有一个使用Spring Integration的Spring Boot项目。我从Spring Boot 2.1.9.RELEASE升级到2.2.1.RELEASE，现在我的应用程序启动时出现异常。

该异常记录在DEBUG级别，我的应用程序似乎仍然可以正常工作。

这是新版本的Spring Integration中的错误吗？

堆栈跟踪：

2019-11-09 11:57:28.983 DEBUG 12776 --- [  restartedMain] o.s.i.h.s.MessagingMethodInvokerHelper   : Exception trying to extract interface

java.lang.ClassCastException: class com.demo.mail.ConfirmationMailTransformer cannot be cast to class org.springframework.aop.framework.Advised (com.demo.mail.ConfirmationMailTransformer is in unnamed module of loader org.springframework.boot.devtools.restart.classloader.RestartClassLoader @24ed52ef; org.springframework.aop.framework.Advised is in unnamed module of loader 'app')
    at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.getTargetClass(MessagingMethodInvokerHelper.java:985) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.findHandlerMethodsForTarget(MessagingMethodInvokerHelper.java:711) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.<init>(MessagingMethodInvokerHelper.java:294) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.<init>(MessagingMethodInvokerHelper.java:215) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.handler.support.MessagingMethodInvokerHelper.<init>(MessagingMethodInvokerHelper.java:219) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.handler.MethodInvokingMessageProcessor.<init>(MethodInvokingMessageProcessor.java:54) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.transformer.MethodInvokingTransformer.<init>(MethodInvokingTransformer.java:43) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.config.TransformerFactoryBean.createMethodInvokingHandler(TransformerFactoryBean.java:53) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.config.AbstractStandardMessageHandlerFactoryBean.createHandler(AbstractStandardMessageHandlerFactoryBean.java:142) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.config.AbstractSimpleMessageHandlerFactoryBean.createHandlerInternal(AbstractSimpleMessageHandlerFactoryBean.java:198) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.config.AbstractSimpleMessageHandlerFactoryBean.getObject(AbstractSimpleMessageHandlerFactoryBean.java:186) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.integration.config.AbstractSimpleMessageHandlerFactoryBean.getObject(AbstractSimpleMessageHandlerFactoryBean.java:60) ~[spring-integration-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:135) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:377) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:127) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:427) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:173) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1706) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1451) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at com.demo.DemoApplication.main(DemoApplication.java:12) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[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:566) ~[na:na]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.2.1.RELEASE.jar:2.2.1.RELEASE]

这是我的班级ConfirmationMailTransformer的样子：

package com.demo.mail;

import com.demo.model.RegistrationEvent;
import org.springframework.stereotype.Component;

@Component
public class ConfirmationMailTransformer {

    public String toMailText(RegistrationEvent event) {
        return "Email text";
    }
}

使用Spring Integration XML配置进行配置：

<!-- Transform payload to text to be used as the body of the e-mail -->
<int:transformer ref="confirmationMailTransformer" method="toMailText"/>

Java版本（在Ubuntu 18.04上为AdoptOpenJDK 11）：

openjdk version "11.0.4" 2019-07-16
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.4+11)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.4+11, mixed mode)

使用Spring Boot Starter for Spring Integration从https://start.spring.io生成的纯Spring Boot应用程序，以mvn spring-boot:run运行

spring spring-boot spring-integration
1个回答
2
投票

根据异常消息中的“未命名模块”判断，您正在使用Java的模块系统。从异常消息中的RestartClassLoader判断，您正在使用Spring Boot的DevTools。在撰写本文时，此组合不受支持，并且不起作用。您可能需要订阅一个open enhancement request。

不管模块系统和DevTools可能不受支持的组合，行为的变化似乎都归因于Spring Integration中的this commit。以前，在尝试转换为AopUtils.isAopProxy(targetObject)之前先检查true是否为Advised。不再进行此检查。如果启用了调试日志记录，那应该是一个不错的选择，尽管有点难看。您可能需要举起Spring Integration issue，以便团队可以调查并在需要时恢复支票。

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