[Java] Problema avvio web app con tomcat

[Amargosa]

Ciao a tutti,

devo costruire un progetto web con

Struts 2.1.6
Java 1.5
e Tomcat 5.5

Ho creato l'applicazione di base con delle action, una jsp
Configurato lo struts config.

Ma quando avvio tomcat dopo aver compilato (utilizzo Eclipse)
Mi compare il seguente errore

GRAVE: Exception starting filter struts2
Unable to load configuration. - bean - jar:file:/Users/domenicocosta/Progetti/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/GrandiStatisticheGazzetta/WEB-INF/lib/struts2-core-2.1.6.jar!/struts-default.xml:46:178
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)
	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(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	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 bean: type:org.apache.struts2.dispatcher.multipart.MultiPartRequest class:org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest - bean - jar:file:/Users/domenicocosta/Progetti/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/GrandiStatisticheGazzetta/WEB-INF/lib/struts2-core-2.1.6.jar!/struts-default.xml:46:178
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:222)
	at org.apache.struts2.config.StrutsXmlConfigurationProvider.register(StrutsXmlConfigurationProvider.java:101)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:165)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
	... 21 more
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/fileupload/RequestContext
	at java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
	at java.lang.Class.getDeclaredConstructors(Class.java:1836)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.register(XmlConfigurationProvider.java:212)
	... 24 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.fileupload.RequestContext
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1232)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:398)
	... 28 more
3-mar-2010 12.01.51 org.apache.catalina.core.StandardContext start
GRAVE: Error filterStart