Unable to load configuration-struts2

[Romeo Ranjan]

Hi
I am trying to work out struts tutorial.I use struts2.This is the tutorial link that I followed http://devtalks.blogspot.com/2009/07/eclipse-galileo-and-struts2.html
Below is the exception I get.My struts.xml file is in Web-inf/classes folder.I have included the jar file in the web-inf/lib folder.The list of jar files are

1.commons-fileupload-1.2.1.jar
2.commons-io-1.3.2.jar
3.commons-logging-1.0.4.jar
4.freemarker-2.3.15.jar
5.ognl-2.7.3.jar
6.struts2-core-2.1.8.1.jar
7.xwork-core-2.1.6.jar

Mar 12, 2010 5:29:36 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter struts2
Unable to load configuration. - file:/C:/jeewebworkspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/GalileoStruts2Example/WEB-INF/classes/struts.xml:3:9
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
	at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:221)
	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:302)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:78)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3666)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4258)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
	at org.apache.catalina.core.StandardService.start(StandardService.java:448)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:552)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)
Caused by: Unable to load configuration. - file:/C:/jeewebworkspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/GalileoStruts2Example/WEB-INF/classes/struts.xml:3:9
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
	... 19 more
Caused by: Unable to load file:/C:/jeewebworkspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/GalileoStruts2Example/WEB-INF/classes/struts.xml - file:/C:/jeewebworkspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/GalileoStruts2Example/WEB-INF/classes/struts.xml:3:9
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:898)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:143)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:110)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:168)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
	... 21 more
Caused by: Document root element "struts", must match DOCTYPE root "unspecified". - file:/C:/jeewebworkspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/GalileoStruts2Example/WEB-INF/classes/struts.xml:3:9
	at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:115)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:893)
	... 25 more
Caused by: org.xml.sax.SAXParseException: Document root element "struts", must match DOCTYPE root "unspecified".
	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.rootElementSpecified(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
	at javax.xml.parsers.SAXParser.parse(Unknown Source)
	at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:113)
	... 26 more
Mar 12, 2010 5:29:36 PM org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
Mar 12, 2010 5:29:36 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/GalileoStruts2Example] startup failed due to previous errors
Mar 12, 2010 5:29:37 PM org.apache.coyote.http11.Http11BaseProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Mar 12, 2010 5:29:37 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Mar 12, 2010 5:29:37 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/31  config=null
Mar 12, 2010 5:29:37 PM org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
Mar 12, 2010 5:29:37 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 1234 ms

[Mark E Hansen]

What does your struts.xml file look like?

[Romeo Ranjan]

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE unspecified PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
   <package name="struts2Example" extends="struts-default">
     <action name="entername">
       <result>/jsp/nameinput.jsp</result>
     </action>
     <action name="sayhello" class="struts2Example.Hello">
       <result name="input">/jsp/nameinput.jsp</result>
       <result>/jsp/response.jsp</result>
     </action>
   </package>
</struts>

This is how my struts.xml look like.

[Lorand Komaromi]

The error message says clearly that your doctype is messed up:

Caused by: Document root element "struts", must match DOCTYPE root "unspecified".

The correct doctype:

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

Your root element is "struts", not "unnamed"...

[Romeo Ranjan]

Thanks a lot,now it works.I want to know how did you learn to solve these errors in struts,is it by experience?

[Mark E Hansen]

Romeo Ranjan wrote:Thanks a lot,now it works.I want to know how did you learn to solve these errors in struts,is it by experience?

Well, how did you know to create your doctype with the word "unspecified"?

[Lorand Komaromi]

Romeo Ranjan wrote:I want to know how did you learn to solve these errors in struts,is it by experience?

The logs are a good starting point when debugging, in many cases (like this one) they pinpoint the cause. It's not rocket science, really...