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addChild: Child name 'jsp' is not unique

 
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I ma getting this weird exception on Tomcat, I am trying to run this with Struts and Velocity. I am running Tomcat 4.1 with JDK 1.4.2

SEVERE: End event threw exception
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor42.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:228)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:260)
at org.apache.commons.digester.Digester.endElement(Digester.java:1036)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:585)
at org.apache.xerces.impl.XMLNamespaceBinder.endElement(XMLNamespaceBinder.java:647)
at org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:1937)
at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:851)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentS
cannerImpl.java:1008)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(
XMLDocumentFragmentScannerImpl.java:1469)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentSca
nnerImpl.java:329)
at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:525)
at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.java:581)
at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152)
at org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1175)
at org.apache.commons.digester.Digester.parse(Digester.java:1495)
at org.apache.catalina.startup.ContextConfig.applicationConfig(ContextConfig.java:282)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:639)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:243)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:3567)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:821)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:579)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:257)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:772)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:569)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:411)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:879)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:368)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:166)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1196)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:738)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1188)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:347)
at org.apache.catalina.core.StandardService.start(StandardService.java:497)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2189)
at org.apache.catalina.startup.Catalina.start(Catalina.java:512)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:400)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
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:324)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
Caused by: java.lang.IllegalArgumentException: addChild: Child name 'jsp' is not unique
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:815)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardContext.addChild(StandardContext.java:1339)
... 47 more

What to do???
 
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it looks like one of your XML files is not well formed.
 
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