Spring定時任務(wù)中@PostConstruct被多次執(zhí)行異常的示例分析

這篇文章主要介紹Spring定時任務(wù)中@PostConstruct被多次執(zhí)行異常的示例分析，文中介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們一定要看完！

發(fā)現(xiàn)問題

最近在項目中剛剛修改一個功能，代碼正準備驗證，啟動Idea的debug模式，運行項目，發(fā)現(xiàn)啟動失敗，查看日志發(fā)現(xiàn)定時任務(wù)被重復(fù)執(zhí)行，導(dǎo)致異常。debug定時任務(wù)的初始化類，發(fā)現(xiàn)啟動定時任務(wù)是在@PostConstruct方法中執(zhí)行的，網(wǎng)上查詢，有說Spring在某種情況下初始化有bug，注解@Component可能出現(xiàn)多次執(zhí)行。把@Component修改為@Service就行了！

結(jié)果我改了也沒解決問題！

無賴更一步跟進日志，發(fā)現(xiàn)以下內(nèi)容：

[ERROR][2017-06-20 19:50:16] - [org.springframework.web.servlet.DispatcherServlet] - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'galleryController' bean method 
public com.test.model.domain.response.Result com.test.model.back.controller.GalleryController.removeRecord(java.lang.Integer)
to {[/gallery/removeRecord],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'galleryController' bean method
public java.lang.String com.test.model.back.controller.GalleryController.removeRecord(java.lang.Integer,org.springframework.ui.ModelMap) mapped.
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:663) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:535) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:489) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) [spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at javax.servlet.GenericServlet.init(GenericServlet.java:158) [servlet-api.jar:3.0.FR]
 at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1282) [catalina.jar:7.0.70]
 at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088) [catalina.jar:7.0.70]
 at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5349) [catalina.jar:7.0.70]
 at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5641) [catalina.jar:7.0.70]
 at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147) [catalina.jar:7.0.70]
 at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899) [catalina.jar:7.0.70]
 at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875) [catalina.jar:7.0.70]
 at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) [catalina.jar:7.0.70]
 at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1863) [catalina.jar:7.0.70]
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
 at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
 at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) [tomcat-coyote.jar:7.0.70]
 at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [na:1.7.0_79]
 at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [na:1.7.0_79]
 at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) [catalina.jar:7.0.70]
 at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) [catalina.jar:7.0.70]
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
 at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
 at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) [tomcat-coyote.jar:7.0.70]
 at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) [na:1.7.0_79]
 at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) [na:1.7.0_79]
 at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1487) [na:1.7.0_79]
 at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:97) [na:1.7.0_79]
 at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1328) [na:1.7.0_79]
 at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1420) [na:1.7.0_79]
 at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:848) [na:1.7.0_79]
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
 at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
 at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322) [na:1.7.0_79]
 at sun.rmi.transport.Transport$2.run(Transport.java:202) [na:1.7.0_79]
 at sun.rmi.transport.Transport$2.run(Transport.java:199) [na:1.7.0_79]
 at java.security.AccessController.doPrivileged(Native Method) [na:1.7.0_79]
 at sun.rmi.transport.Transport.serviceCall(Transport.java:198) [na:1.7.0_79]
 at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:567) [na:1.7.0_79]
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828) [na:1.7.0_79]
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.access$400(TCPTransport.java:619) [na:1.7.0_79]
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$1.run(TCPTransport.java:684) [na:1.7.0_79]
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$1.run(TCPTransport.java:681) [na:1.7.0_79]
 at java.security.AccessController.doPrivileged(Native Method) [na:1.7.0_79]
 at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:681) [na:1.7.0_79]
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_79]
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_79]
 at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79]
Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'galleryController' bean method 
public com.test.model.domain.response.Result com.test.model.back.controller.GalleryController.removeRecord(java.lang.Integer)
to {[/gallery/removeRecord],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'galleryController' bean method
public java.lang.String com.test.model.back.controller.GalleryController.removeRecord(java.lang.Integer,org.springframework.ui.ModelMap) mapped.
 at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:212) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:184) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:144) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:123) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:126) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
 ... 63 common frames omitted
[2017-06-20 07:50:16,467] Artifact back:war exploded: Artifact is deployed successfully
[2017-06-20 07:50:16,467] Artifact back:war exploded: Deploy took 6,867 milliseconds

解決方法：

原來，由于定時任務(wù)異常比較多，忽略了最開始的異常內(nèi)容，發(fā)現(xiàn)程序異常后自己重新又啟動了，而這個異常是GalleryController這個控制器中@RequestMapping配置重復(fù)導(dǎo)致的。springMVC中不允許有重復(fù)@RequestMapping，剛剛修改的方法中忘記修改@RequestMapping中的地址，所以報錯，而Idea發(fā)現(xiàn)異常后會自動重啟Tomcat容器，結(jié)果就是無限循環(huán)，異常日志太多，看不過來，異常排查的方向不對導(dǎo)致！

以上是“Spring定時任務(wù)中@PostConstruct被多次執(zhí)行異常的示例分析”這篇文章的所有內(nèi)容，感謝各位的閱讀！希望分享的內(nèi)容對大家有幫助，更多相關(guān)知識，歡迎關(guān)注億速云行業(yè)資訊頻道！