Ich erstelle eine grundlegende Struts2-, Maven-Webanwendung und erhalte diesen Fehler, wenn ich auf Tomcat 6 oder Jetty bereitstelle. Hat das jemand gesehen?

  2010-07-29 15:33:38.801::WARN:  failed struts2
    Unable to load bean: type: class:com.opensymphony.xwork2.ObjectFactory - bean - jar:file:/C:/workspaces/test/test/target/work/webapp/WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
     at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:208)
     at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
     at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:131)
     at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52)
     at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395)
     at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452)
     at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
     at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
     at org.mortbay.jetty.servlet.Fil,terHolder.doStart(FilterHolder.java:97)
     at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
     at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:589)
     at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
     at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
     at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
     at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
     at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:110)
     at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
     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:39)
     at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
     at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
     at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
     at org.mortbay.jetty.Server.doStart(Server.java:222)
     at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
     at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
     at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:357)
     at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:293)
     at org.mortbay.jetty.plugin.Jetty6RunWar.execute(Jetty6RunWar.java:67)
     at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
     at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
     at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
     at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
     at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
     at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
     at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
     at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
     at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
     at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
     at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:592)
     at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
     at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
     at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
     at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
    Caused by: Bean type class com.opensymphony.xwork2.ObjectFactory with the name xwork has already been loaded by bean - jar:file:/C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/struts2-core-2.0.11.2.jar!/struts-default.xml:30:72 - bean - jar:file:/C:/workspaces/ulearn/ulearn/target/work/webapp/WEB-INF/lib/struts2-core-2.1.8.1.jar!/struts-default.xml:29:72
     at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:193)
 ... 47 more

Using Maven ...

  <dependency>
   <groupId>org.apache.struts</groupId>
   <artifactId>struts2-core</artifactId>
   <version>2.1.8.1</version>
  </dependency>

web.xml

 <filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
 </filter>

 <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>

Look ist ziemlich direkt, ich verstehe nicht, warum es nicht geladen wird. Ich habe das grundlegende Tutorial befolgt. Ich habe nach dieser Fehlermeldung gegoogelt und konnte nichts Relevantes finden.