Java - Servlets

Hola buenas tardes.
Lo que me pasa a mí es lo siguiente. Quiero publiar un servlet, que tengo en la carpeta tutorial->web-inf->classes. Y el fichero se llama Hola.
Mi fichero web.xml, es el siguiente
<web-app>
<servlet>
<servlet-name>holam</servlet-name>
<servlet-class>Hola</servlet-class>
</servlet>


<servlet-mapping>
<servlet-name>holam</servlet-name>
<url-pattern>/tutorial</url-pattern>
</servlet-mapping>
</web-app>

Y lo que me sucede, es que me da un error 404, cuando accedo a la pagina
http://localhost:8080/tutorial

Alguien sabe lo que hago mal.

Tienes que fijarte el Log de tu contenedor de Servlets ...

Este es el contenido de catalina.log, el unico log, que tiene texto.
Lo mando, por si alguien lo entiende, y me dic donde esta el error.
Muchas gracias por todo

07-oct-2009 9:02:07 org.apache.catalina.core.AprLifecycleListener init
INFO: La biblioteca nativa de Apache Tomcat basada en ARP que permite un rendimiento óptimo en entornos de desarrollo no ha sido hallada en java.library.path: C:\Program Files\Apache Software Foundation\Tomcat 6.0\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\Intel\DMIX;C:\Program Files\Common Files\Roxio Shared\DLLShared\;C:\Program Files\Common Files\Roxio Shared\DLLShared\;C:\Program Files\Common Files\Roxio Shared\9.0\DLLShared\
07-oct-2009 9:02:07 org.apache.coyote.http11.Http11Protocol init
INFO: Inicializando Coyote HTTP/1.1 en puerto http-8080
07-oct-2009 9:02:07 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 691 ms
07-oct-2009 9:02:08 org.apache.catalina.core.StandardService start
INFO: Arrancando servicio Catalina
07-oct-2009 9:02:08 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.20
07-oct-2009 9:02:08 org.apache.coyote.http11.Http11Protocol start
INFO: Arrancando Coyote HTTP/1.1 en puerto http-8080
07-oct-2009 9:02:09 org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
07-oct-2009 9:02:09 org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/62 config=null
07-oct-2009 9:02:09 org.apache.catalina.startup.Catalina start
INFO: Server startup in 1112 ms
07-oct-2009 9:10:29 org.apache.catalina.startup.HostConfig checkResources
INFO: Falló la recarga del contexto [/tutorial]
07-oct-2009 9:10:29 org.apache.tomcat.util.digester.Digester fatalError
GRAVE: Parse Fatal Error at line 14 column 3: The element type "servlet-mapping" must be terminated by the matching end-tag "</servlet-mapping>".
org.xml.sax.SAXParseException: The element type "servlet-mapping" must be terminated by the matching end-tag "</servlet-mapping>".
07-oct-2009 9:18:20 org.apache.catalina.startup.HostConfig checkResources
INFO: Falló la recarga del contexto [/tutorial]
07-oct-2009 9:18:20 org.apache.tomcat.util.digester.Digester endElement
GRAVE: End event threw exception
java.lang.reflect.InvocationTargetException
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.tomcat.util.IntrospectionUtils.callMethodN(IntrospectionUtils.java:956)
at org.apache.catalina.startup.CallMethodMultiRule.end(WebRuleSet.java:789)
at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1140)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endNamespaceScope(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1644)
at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:365)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1066)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4339)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1173)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1271)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:296)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.IllegalArgumentException: <url-pattern> tutorial/holamundo inválida en mapeo de servlet
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:2474)
at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:2450)
... 36 more
07-oct-2009 9:18:20 org.apache.catalina.startup.ContextConfig applicationWebConfig
GRAVE: Error de evaluación (parse) en el archivo web.xml de la aplicación a jndi:/localhost/tutorial/WEB-INF/web.xml
java.lang.IllegalArgumentException: <url-pattern> tutorial/holamundo inválida en mapeo de servlet
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2808)
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2834)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1143)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endNamespaceScope(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.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$JAXPSAXParser.parse(Unknown Source)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1644)
at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:365)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1066)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4339)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1173)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1271)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:296)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
at java.lang.Thread.run(Unknown Source)
07-oct-2009 9:18:20 org.apache.catalina.startup.ContextConfig applicationWebConfig
GRAVE: Se ha producido en la línea 14 columna 20
07-oct-2009 9:18:20 org.apache.catalina.startup.ContextConfig start
GRAVE: Esta aplicación está marcada como no disponible debido a los errores precedentes
07-oct-2009 9:18:20 org.apache.catalina.core.StandardContext start
GRAVE: Error getConfigured
07-oct-2009 9:18:20 org.apache.catalina.core.StandardContext start
GRAVE: Falló en arranque del Contexto [/tutorial] debido a errores previos
07-oct-2009 9:20:00 org.apache.catalina.startup.HostConfig checkResources
INFO: Falló la recarga del contexto [/tutorial]
07-oct-2009 9:20:00 org.apache.catalina.core.StandardContext stop
INFO: No se ha arrancado el Contenedor org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/tutorial]

el web.xml esta mal formado

Y como se formatea, el web.mxl

Amigos como lo puedo hacer si tengo varios servlets para definir sus URL Pattern
este es mi web.xml y me da un error cuando descomento lo de los </servlet-mapping> no me abre el proyecto me podrian ayudar a saber cual es mi error

hola,
tienes que tener una etiqueta servlet-mapping por cada servlet. ¿Que dice el error cuando descomentas?
Saludos