从 Spring Boot 2.1.9 升级到 2.2.1 后出现 ClassCastException（Spring 集成）
ClassCastException after upgrading from Spring Boot 2.1.9 to 2.2.1 (Spring Integration)
我有一个使用 Spring 集成的 Spring 引导项目。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。
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 Spring 集成中的错误吗？
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[=12=](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 class 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 集成 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 上采用 OpenJDK 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)
Plain Spring 从 https://start.spring.io 生成的引导应用程序，带有 Spring 用于 Spring 集成的引导启动器，运行 mvn spring-boot:run
根据异常消息中的 "unnamed module" 判断，您正在使用 Java 的模块系统。根据异常消息中的 RestartClassLoader 判断，您正在使用 Spring Boot 的 DevTools。在撰写本文时，此组合不受支持且已知无效。有一个 open enhancement request 您可能想要订阅。
不管模块系统和 DevTools 可能不受支持的组合，行为的变化似乎是由于 this commit in Spring Integration. Previously, there was a check for AopUtils.isAopProxy(targetObject) being true before an attempt to cast to Advised was made. This check is no longer made. That should be benign although slightly ugly if you have debug logging enabled. You may want to raise a Spring Integration issue 以便团队可以调查并在需要时恢复检查。
我有一个使用 Spring 集成的 Spring 引导项目。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。
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 Spring 集成中的错误吗？
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[=12=](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 class 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 集成 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 上采用 OpenJDK 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)
Plain Spring 从 https://start.spring.io 生成的引导应用程序，带有 Spring 用于 Spring 集成的引导启动器，运行 mvn spring-boot:run
根据异常消息中的 "unnamed module" 判断，您正在使用 Java 的模块系统。根据异常消息中的 RestartClassLoader 判断，您正在使用 Spring Boot 的 DevTools。在撰写本文时，此组合不受支持且已知无效。有一个 open enhancement request 您可能想要订阅。
不管模块系统和 DevTools 可能不受支持的组合，行为的变化似乎是由于 this commit in Spring Integration. Previously, there was a check for AopUtils.isAopProxy(targetObject) being true before an attempt to cast to Advised was made. This check is no longer made. That should be benign although slightly ugly if you have debug logging enabled. You may want to raise a Spring Integration issue 以便团队可以调查并在需要时恢复检查。