無法初始化上下文，因爲已經存在根應用程序上下文

Question

我的項目使用tapestry 5.3.0，spring 3.0.6.RELEASE，hibernate 3.6.8.FINAL和maven.When 我構造jetty以啓動mvn項目碼頭：運行時，我得到如下：

2011-12-13 16:15:42.947:WARN::failed app: java.lang.RuntimeException: Exception  constructing service 'ApplicationContext': Cannot initialize context because there is already a root application context present - check whether you have multiple ContextLoader* definitions in your web.xml! 
2011-12-13 16:15:42.948:WARN::Failed startup of context org.mortbay.jetty.plugin.Jetty6PluginWebAppContext@98062f{/projektni,/home/borislav/eclipse_ workspace/web_apps/projektni/src/main/webapp} 
java.lang.RuntimeException: Exception constructing service 'ApplicationContext': Cannot initialize context because there is already a root application context present - check whether you have multiple ContextLoader* definitions in your web.xml! 
at org.apache.tapestry5.ioc.internal.services.JustInTimeObjectCreator.obtainObjectFromCreator(J ustInTimeObjectCreator.java:78) 
at org.apache.tapestry5.ioc.internal.services.JustInTimeObjectCreator.createObject(JustInTimeOb jectCreator.java:56) 
at $ConfigurableWebApplicationContext_10f23e440970.delegate(Unknown Source) 
at $ConfigurableWebApplicationContext_10f23e440970.getBeanDefinitionCount(Unknown Source) 
at org.apache.tapestry5.spring.SpringModule$1.initializeApplication(SpringModule.java:58) 
at $ApplicationInitializer_10f23e440987.initializeApplication(Unknown Source) 
at org.apache.tapestry5.services.TapestryModule$39.initializeApplication(TapestryModule.java:25 55) 
at $ApplicationInitializer_10f23e440987.initializeApplication(Unknown Source) 
at $ApplicationInitializer_10f23e440983.initializeApplication(Unknown Source) 
at org.apache.tapestry5.services.TapestryModule$ServletApplicationInitializerTerminator.initial izeApplication(TapestryModule.java:411) 
at $ServletApplicationInitializer_10f23e440969.initializeApplication(Unknown Source) 
at org.apache.tapestry5.TapestryFilter.init(TapestryFilter.java:102) 
at org.mortbay.jetty.servlet.FilterHolder.doStart(FilterHolder.java:97) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:713) 
at org.mortbay.jetty.servlet.Context.startContext(Context.java:140) 
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1282) 
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:518) 
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) 
at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:11 5) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) 
at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) 
at org.mortbay.jetty.Server.doStart(Server.java:224) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132) 
at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:454) 
at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:396) 
at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:210) 
at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184) 
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java :107) 
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209) 
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153) 
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145) 
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuild er.java:84) 
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuild er.java:59) 
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.ja va:183) 
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161) 
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319) 
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156) 
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:534) 
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196) 
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:616) 
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290) 
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230) 
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409) 
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352) 
2011-12-13 16:15:43.009:INFO::Started SelectChannelConnector@0.0.0.0:8080[INFO] 
Started Jetty Server 

的web.xml看起來是這樣的：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE web-app 
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 
    "http://java.sun.com/dtd/web-app_2_3.dtd"> 
<web-app> 
<display-name>projektni Tapestry 5 Application</display-name> 

<context-param> 
    <!-- The only significant configuration for Tapestry 5, this informs Tapestry 
     of where to look for pages, components and mixins. --> 
    <param-name>tapestry.app-package</param-name> 
    <param-value>org.prikic.projektni</param-value> 
</context-param> 
<!-- Specify some additional Modules for two different execution modes: 
    development and qa. Remember that the default execution mode is production --> 
<context-param> 
    <param-name>tapestry.development-modules</param-name> 
    <param-value> 
     org.prikic.projektni.services.DevelopmentModule 
    </param-value> 
</context-param> 
<context-param> 
    <param-name>tapestry.qa-modules</param-name> 
    <param-value> 
     org.prikic.projektni.services.QaModule 
    </param-value> 
</context-param> 


<context-param> 
    <param-name>contextConfigLocation</param-name> 
    <param-value> 

     <!-- /WEB-INF/application_context_dao.xml --> 
     <!-- /WEB-INF/application_context*.xml --> 
     classpath:application_context*.xml 

    </param-value> 
</context-param> 

<filter> 
    <filter-name>app</filter-name> 
    <!-- Special filter that adds in a T5 IoC module derived from the Spring 
     WebApplicationContext. --> 
    <filter-class>org.apache.tapestry5.spring.TapestrySpringFilter</filter-class> 
</filter> 

<filter-mapping> 
    <filter-name>app</filter-name> 
    <url-pattern>/*</url-pattern> 
</filter-mapping> 


<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
    </listener> 

<!-- <servlet> 
    <servlet-name>context</servlet-name> 
    <servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class> 
    <load-on-startup>1</load-on-startup> 
</servlet> --> 

<welcome-file-list> 
    <welcome-file>Index</welcome-file> 
</welcome-file-list> 

如果您有什麼需要的源代碼文件，T我會和他們發帖

想法，任何人？

Answer 1

您應該從web.xml中刪除ContextLoaderListener。以下是來自Tapestry Spring integration頁面。

請忽略關於創建ContextLoaderListener的部分：這現在由Tapestry自動完成。