Could not instantiate Seam component: org.jboss.seam.web.session

[fjkjava]

All,

@Scope(ScopeType.EVENT) 
public class AccessControl {

@Observer("org.jboss.seam.security.loginSuccessful") 
public void initializeUserModules(){
        Set<String> modules = new HashSet<String>(aclService.loadPermission(identity.getDomainUserBean().getUserId(), Constants.APPLICATION_NAME));
        if(modules!=null && modules.size()>0){
            Context sessionContext  = Contexts.getSessionContext();
            if(sessionContext!=null){
                sessionContext.set("modules", modules);
            }
        }        
    }

public boolean hasPermission(String module) {
        try {
            Context sessionContext  = Contexts.getSessionContext();
            if(sessionContext!=null){                
                Object modulesMap = sessionContext.get("modules");
                if(modulesMap!=null){
                    Set<String> modules = new HashSet<String>((Collection<? extends String>) modulesMap);
                    return modules.contains(module);
                }
                return false;
            }
            return false;
        } catch (Exception e) {                       
            return false;
        }
    }

}

After I added the above methods to AccessControl class I am getting the below error. Can somebody say the reason for it. Do I need to remove the HashMap from session on logout. I am using jdk 7 and EAP 6.

2013-07-01 17:26:59,014 ERROR [org.jboss.as.txn] JBAS010152: APPLICATION ERROR: transaction still active in request with status 0

2013-07-01 17:26:59,188 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/workschain].[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception: org.jboss.seam.InstantiationException: Could not instantiate Seam component: org.jboss.seam.web.session

    at org.jboss.seam.Component.newInstance(Component.java:2170)

    at org.jboss.seam.Component.getInstance(Component.java:2024)

    at org.jboss.seam.Component.getInstance(Component.java:2003)

    at org.jboss.seam.Component.getInstance(Component.java:1997)

    at org.jboss.seam.Component.getInstance(Component.java:1970)

    at org.jboss.seam.web.Session.getInstance(Session.java:122)

    at org.jboss.seam.contexts.Contexts.flushAndDestroyContexts(Contexts.java:406)

    at org.jboss.seam.contexts.Lifecycle.endRequest(Lifecycle.java:164)

    at org.jboss.seam.web.ExceptionFilter.endWebRequestAfterException(ExceptionFilter.java:89)

    at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:70)

    at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

    at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)

    at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

    at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)

    at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

    at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)

    at org.jboss.modcluster.container.jbossweb.JBossWebContext$RequestListenerValve.event(JBossWebContext.java:67)

    at org.jboss.modcluster.container.jbossweb.JBossWebContext$RequestListenerValve.invoke(JBossWebContext.java:48)

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:397)

    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)

    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368)

    at org.apache.coyote.ajp.AjpAprProcessor.process(AjpAprProcessor.java:490)

    at org.apache.coyote.ajp.AjpAprProtocol$AjpConnectionHandler.process(AjpAprProtocol.java:487)

    at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2039)

    at java.lang.Thread.run(Thread.java:722)

Caused by: java.lang.NullPointerException

    at com.sun.faces.context.SessionMap.put(SessionMap.java:127)

    at com.sun.faces.context.SessionMap.put(SessionMap.java:61)

    at org.jboss.seam.contexts.BasicContext.set(BasicContext.java:84)

    at org.jboss.seam.Component.newInstance(Component.java:2152)

    ... 32 more

Thanks