Ajuda com JAAS e Struts 2

Pessoal, bom dia!

Estou montando uma aplicação com struts2, e para a parte de login estou utilizando o JAAS, para deixar o toncat responsável por efetuar esta tarefa. Minha aplicação ainda é basica, porem estou com uma dificuldade que nao consigo superar.

A lógica é a seguinte:

Ao entrar no site, o usuário é redirecionado para uma página protegida, e precisa fazer login para ter acesso a esta página. Apos o login, ele pode efetuar acesso normalmente ao site, porem nao é isso que acontece. Durante o redirecionamento, é gerada uma exception e não consigo de jeito nenhum arrumar! Alguem tem alguma ideia?

Seguem códigos:

index.jsp

<% response.sendRedirect("/S2Starter/jsp/home.jsp"); %>

jsp/home.jsp

<body>
	Welcome <s:property value="id"/>
</body>

<head>
	<title>Sign In</title>
	<s:head />
</head>
<body>
	<s:form action="j_security_check">
		<s:textfield label="Fratechs login" name="j_username" />
		<s:password label="Password" name="j_password" />
		<s:submit />
	</s:form>
</body>

web.xml

<web-app id="starter" version="2.4" 
         xmlns="http://java.sun.com/xml/ns/j2ee" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	
	<display-name>S2Sterter  - Task Control System</display-name>
	
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath*:applicationContext*.xml</param-value>
	</context-param>
	
	<!-- Filters -->
    <filter>
        <filter-name>action2-cleanup</filter-name>
     	<filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
     </filter> 
    <filter>
        <filter-name>sitemesh</filter-name>
        <filter-class>com.opensymphony.module.sitemesh.filter.PageFilter</filter-class>
    </filter>
    <filter>
        <filter-name>action2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>

	
    <filter-mapping>
        <filter-name>action2-cleanup</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    
    <filter-mapping>
        <filter-name>sitemesh</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping> 
    <filter-mapping>
        <filter-name>action2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
	
    <!-- Listeners -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
     
    <!-- Servlets -->
    <servlet>
    	<servlet-name>jspSupportServlet</servlet-name>
    	<servlet-class>org.apache.struts2.views.JspSupportServlet</servlet-class>
    	<load-on-startup>5</load-on-startup>
    </servlet>
    
    
    <!-- Welcome file lists -->
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
	
	<security-constraint>
		<web-resource-collection>
			<web-resource-name>AllPages</web-resource-name>
			<description>All Pages under jsp directory</description>
			<url-pattern>/jsp/*</url-pattern>
			<http-method>POST</http-method>
			<http-method>GET</http-method>
		</web-resource-collection>
		<auth-constraint>
			<description>All roles can access that</description>
		  	<role-name>ADMIN</role-name>
			<role-name>RESOURCE</role-name>
			<role-name>CLIENT</role-name>
			<role-name>MANAGER</role-name>
		</auth-constraint>
	</security-constraint>
	
	<security-role>
		<role-name>ADMIN</role-name>
	</security-role>
	<security-role>
		<role-name>RESOURCE</role-name>
	</security-role>
	<security-role>
		<role-name>MANAGER</role-name>
	</security-role>
	<security-role>
		<role-name>CLIENT</role-name>
	</security-role>
	
    <login-config>
    	<auth-method>FORM</auth-method>
		<form-login-config>
			<form-login-page>/login.jsp</form-login-page>
			<form-error-page>/login.jsp</form-error-page>
		</form-login-config>
	</login-config>

</web-app>

context.xml

<Resource  
                    name="meuBD"  
                    auth="Container"  
                    type="javax.sql.DataSource"  
                    driverClassName="org.gjt.mm.mysql.Driver"  
                    url="jdbc:mysql://localhost/s2starter?autoReconnect=true"  
                    username="root"  
                    password=""  
                    maxActive="30"  
                    maxIdle="10"  
                    maxWait="-1"/>
               
  
 <Realm className="org.apache.catalina.realm.DataSourceRealm" 
 			name="meuDBjdbc"
   			localDataSource="true" 
            debug="99"  
            dataSourceName="meuBD"  
            driverName="org.gjt.mm.mysql.Driver"  
            connectionURL="jdbc:mysql://localhost/s2starter?autoReconnect=true"  
            connectionName="root"  
            connectionPassword=""  
            userTable="user"   
            userNameCol="login"   
            userCredCol="password"  
			userRoleTable="user"   
            roleNameCol="role"/>  

              
</Context>

Lembrando que caso eu utilize apenas o Struts a aplicação funciona normalmente. Fiz um teste apenas com JAAS e tambem funciona. Só nao estou conseguindo integrar os 2 frameworks… alguma ideia?

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