@EnableAsync annotation metadata was not injected

【问题描述】

　　@EnableAsync annotation metadata was not injected

　　spring配置初始化时候报错

　　nested exception is java.lang.IllegalArgumentException:@EnableAsync annotation metadata was not injected

　　详情信息如下：

警告: Exception encountered during context initialization - cancelling refresh attempt  
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.context.annotation.internalAsyncAnnotationProcessor' defined in org.springframework.scheduling.annotation.ProxyAsyncConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.scheduling.annotation.AsyncAnnotationBeanPostProcessor]: Factory method 'asyncAdvisor' threw exception; nested exception is java.lang.IllegalArgumentException: @EnableAsync annotation metadata was not injected  
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)  
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)  
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)  
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)  
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)  
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)  
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)  
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)  
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)  
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:220)  
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:615)  
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:465)  
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:434)  
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)  
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)  
    at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:782)  
    at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:424)  
    at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:774)  
    at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:249)  
    at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1242)  
    at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:717)  
    at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:494)  
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)  
    at org.eclipse.jetty.server.handler.HandlerWrapper.doStart(HandlerWrapper.java:95)  
    at org.eclipse.jetty.server.Server.doStart(Server.java:282)  
    at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)  
    at net.sourceforge.eclipsejetty.starter.embedded.JettyEmbeddedAdapter.start(JettyEmbeddedAdapter.java:67)  
    at net.sourceforge.eclipsejetty.starter.common.AbstractJettyLauncherMain.launch(AbstractJettyLauncherMain.java:84)  
    at net.sourceforge.eclipsejetty.starter.embedded.JettyEmbeddedLauncherMain.main(JettyEmbeddedLauncherMain.java:42)  
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.scheduling.annotation.AsyncAnnotationBeanPostProcessor]: Factory method 'asyncAdvisor' threw exception; nested exception is java.lang.IllegalArgumentException: @EnableAsync annotation metadata was not injected  
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)  
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)  
    ... 28 more  
Caused by: java.lang.IllegalArgumentException: @EnableAsync annotation metadata was not injected  
    at org.springframework.util.Assert.notNull(Assert.java:112)  
    at org.springframework.scheduling.annotation.ProxyAsyncConfiguration.asyncAdvisor(ProxyAsyncConfiguration.java:45)  
    at org.springframework.scheduling.annotation.ProxyAsyncConfiguration

【问题原因】

　　问题出现位置：applicationContext.xml　　

<!-- 配置component所在的包，自动加载需要管理的Bean -->
<context:component-scan base-package="*"></context:component-scan>

　　在上述配置代码行中，如果使用 * 扫描全部的包会出现此异常，该异常出现的原因为扫描到的包包括框架的内部包，导致包发生同名冲突问题。

【解决方法】

　　在该配置给出具体的扫描包范围，例如：

<!-- 配置component所在的包，自动加载需要管理的Bean -->
<context:component-scan base-package="Data.*,DaoContract,Service,ServiceContract"></context:component-scan>

　　该问题即可解决！