Hi all:

We need to use UserActivitySession in an web application. We have activated ActivitySession service at WAS server using web console.

When our application tries to do a:

try{
InitialContext ic = new InitialContext();

UserActivitySession uas = (UserActivitySession)ic.lookup("java:comp/websphere/UserActivitySession");


uas.setSessionTimeout(60);
uas.beginSession();
// doing some things ....
uas.endSession(UserActivitySession.EndModeCheckPoi nt);
}catch (Exception e) {
e.printStackTrace();
}
the lookup("java:comp/websphere/UserActivitySession");
crashes with a trace as follows (our WAS is using spanish language):

[29/10/08 12:12:58:654 CET] 0000002f Helpers W NMSV0605W: Un objeto javax.naming.Reference buscado desde el contexto "java:" con el nombre "comp/websphere/UserActivitySession" se ha enviado al gestor de denominación JNDI y se ha producido una excepción. A continuación se facilitan datos de referencia:
Nombre de clases de fábrica de referencia: com.ibm.ws.ActivitySession.UserActivitySessionWebF actory
URL de ubicación de clases de fábrica:
Reference Class Name: java.lang.Object

A continuación se facilitan datos de la excepción:
com.ibm.websphere.ActivitySession.ActivitySessionE xception
at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.createUserActivitySession(UserActivitySessi onWebFactory.java:116)
at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.getObjectInstance(UserActivitySessionWebFac tory.java:69)
at javax.naming.spi.NamingManager.getObjectInstance(N amingManager.java:316)
at com.ibm.ws.naming.util.Helpers.processSerializedOb jectForLookupExt(Helpers.java:896)
at com.ibm.ws.naming.urlbase.UrlContextHelper.process BoundObjectForLookup(UrlContextHelper.java:191)
at com.ibm.ws.naming.java.javaURLContextRoot.processB oundObjectForLookup(javaURLContextRoot.java:406)
at com.ibm.ws.naming.urlbase.UrlContextImpl.lookup(Ur lContextImpl.java:1280)
at com.ibm.ws.naming.java.javaURLContextImpl.lookup(j avaURLContextImpl.java:384)
at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:204)
at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:144)
at javax.naming.InitialContext.lookup(InitialContext. java:363)
at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.execute(ActivitySessionServlet.java)
at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.doGet(ActivitySessionServlet.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1095)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1036)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:832)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.han dleRequest(ServletWrapper.java:565)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.h andleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3440)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:267)
at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:815)
at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1461)
at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:118)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:458)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:387)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.ready(HttpInboundLink.java:267)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.dete rmineNextChannel(SSLConnectionLink.java:1037)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInboundPostHandshake(SSLConnectionLink.java:725)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInbound(SSLConnectionLink.java:567)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read y(SSLConnectionLink.java:292)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.sendToDiscriminators(NewConnectionIniti alReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.complete(NewConnectionInitialReadCallba ck.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1473)

[29/10/08 12:12:58:654 CET] 0000002f Helpers W NMSV0610I: Se está generando una excepción NamingException desde una implementación javax.naming.Context. A continuación se facilitan más detalles:
Implementación de contexto: com.ibm.ws.naming.java.javaURLContextRoot
Método de contexto: lookup(Name)
Nombre de contexto: java:
Nombre de destino: comp/websphere/UserActivitySession
Otros datos: ""
Rastreo de pila de la excepción: com.ibm.websphere.naming.CannotInstantiateObjectEx ception: Exception occurred while the JNDI NamingManager was processing a javax.naming.Reference object. [Root exception is com.ibm.websphere.ActivitySession.ActivitySessionE xception] at com.ibm.ws.naming.util.Helpers.processSerializedOb jectForLookupExt(Helpers.java:1000)
at com.ibm.ws.naming.urlbase.UrlContextHelper.process BoundObjectForLookup(UrlContextHelper.java:191)
at com.ibm.ws.naming.java.javaURLContextRoot.processB oundObjectForLookup(javaURLContextRoot.java:406)
at com.ibm.ws.naming.urlbase.UrlContextImpl.lookup(Ur lContextImpl.java:1280)
at com.ibm.ws.naming.java.javaURLContextImpl.lookup(j avaURLContextImpl.java:384)
at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:204)
at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:144)
at javax.naming.InitialContext.lookup(InitialContext. java:363)
at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.execute(ActivitySessionServlet.java)
at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.doGet(ActivitySessionServlet.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1095)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1036)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:832)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.han dleRequest(ServletWrapper.java:565)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.h andleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3440)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:267)
at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:815)
at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1461)
at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:118)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:458)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:387)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.ready(HttpInboundLink.java:267)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.dete rmineNextChannel(SSLConnectionLink.java:1037)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInboundPostHandshake(SSLConnectionLink.java:725)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInbound(SSLConnectionLink.java:567)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read y(SSLConnectionLink.java:292)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.sendToDiscriminators(NewConnectionIniti alReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.complete(NewConnectionInitialReadCallba ck.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1473)
Caused by: com.ibm.websphere.ActivitySession.ActivitySessionE xception
at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.createUserActivitySession(UserActivitySessi onWebFactory.java:116)
at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.getObjectInstance(UserActivitySessionWebFac tory.java:69)
at javax.naming.spi.NamingManager.getObjectInstance(N amingManager.java:316)
at com.ibm.ws.naming.util.Helpers.processSerializedOb jectForLookupExt(Helpers.java:896)
... 41 more


[29/10/08 12:13:00:154 CET] 0000002f SystemErr R com.ibm.websphere.naming.CannotInstantiateObjectEx ception: Exception occurred while the JNDI NamingManager was processing a javax.naming.Reference object. [Root exception is com.ibm.websphere.ActivitySession.ActivitySessionE xception]
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.util.Helpers.processSerializedOb jectForLookupExt(Helpers.java:1000)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.urlbase.UrlContextHelper.process BoundObjectForLookup(UrlContextHelper.java:191)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.java.javaURLContextRoot.processB oundObjectForLookup(javaURLContextRoot.java:406)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.urlbase.UrlContextImpl.lookup(Ur lContextImpl.java:1280)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.java.javaURLContextImpl.lookup(j avaURLContextImpl.java:384)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:204)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:144)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at javax.naming.InitialContext.lookup(InitialContext. java:363)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.execute(ActivitySessionServlet.java)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.doGet(ActivitySessionServlet.java:29)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet .java:743)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1095)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1036)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:118)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:832)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:679)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.servlet.ServletWrapper.han dleRequest(ServletWrapper.java:565)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.h andleRequest(ServletWrapper.java:478)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3440)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:267)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:815)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1461)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:118)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:458)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:387)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.ready(HttpInboundLink.java:267)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.dete rmineNextChannel(SSLConnectionLink.java:1037)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInboundPostHandshake(SSLConnectionLink.java:725)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInbound(SSLConnectionLink.java:567)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read y(SSLConnectionLink.java:292)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.sendToDiscriminators(NewConnectionIniti alReadCallback.java:214)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.complete(NewConnectionInitialReadCallba ck.java:113)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1473)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R Caused by: com.ibm.websphere.ActivitySession.ActivitySessionE xception
at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.createUserActivitySession(UserActivitySessi onWebFactory.java:116)
at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.getObjectInstance(UserActivitySessionWebFac tory.java:69)
at javax.naming.spi.NamingManager.getObjectInstance(N amingManager.java:316)
at com.ibm.ws.naming.util.Helpers.processSerializedOb jectForLookupExt(Helpers.java:896)
at com.ibm.ws.naming.urlbase.UrlContextHelper.process BoundObjectForLookup(UrlContextHelper.java:191)
at com.ibm.ws.naming.java.javaURLContextRoot.processB oundObjectForLookup(javaURLContextRoot.java:406)
at com.ibm.ws.naming.urlbase.UrlContextImpl.lookup(Ur lContextImpl.java:1280)
at com.ibm.ws.naming.java.javaURLContextImpl.lookup(j avaURLContextImpl.java:384)
at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:204)
at com.ibm.ws.naming.java.javaURLContextRoot.lookup(j avaURLContextRoot.java:144)
at javax.naming.InitialContext.lookup(InitialContext. java:363)
at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.execute(ActivitySessionServlet.java)
at es.das.organizacion.web.servlets.ActivitySessionSe rvlet.doGet(ActivitySessionServlet.java:29)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1095)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.ser vice(ServletWrapper.java:1036)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.d oFilter(WebAppFilterChain.java:118)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._ doFilter(WebAppFilterChain.java:87)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:832)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager .doFilter(WebAppFilterManager.java:679)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.han dleRequest(ServletWrapper.java:565)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.h andleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.webapp.WebApp.handleReques t(WebApp.java:3440)
at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequ est(WebGroup.java:267)
at com.ibm.ws.webcontainer.WebContainer.handleRequest (WebContainer.java:815)
at com.ibm.ws.wswebcontainer.WebContainer.handleReque st(WebContainer.java:1461)
at com.ibm.ws.webcontainer.channel.WCChannelLink.read y(WCChannelLink.java:118)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleDiscrimination(HttpInboundLink.java:458)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.handleNewInformation(HttpInboundLink.java:387)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLi nk.ready(HttpInboundLink.java:267)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.dete rmineNextChannel(SSLConnectionLink.java:1037)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInboundPostHandshake(SSLConnectionLink.java:725)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read yInbound(SSLConnectionLink.java:567)
at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.read y(SSLConnectionLink.java:292)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.sendToDiscriminators(NewConnectionIniti alReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialRe adCallback.complete(NewConnectionInitialReadCallba ck.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListe ner.futureCompleted(AioReadCompletionListener.java :165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallbac k(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletion Actions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture .java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHand ler.java:195)
at com.ibm.io.async.ResultHandler.runEventProcessingL oop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler .java:873)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.j ava:1473)

[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.createUserActivitySession(UserActivitySessi onWebFactory.java:116)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.ActivitySession.UserActivitySessionWebF actory.getObjectInstance(UserActivitySessionWebFac tory.java:69)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at javax.naming.spi.NamingManager.getObjectInstance(N amingManager.java:316)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R at com.ibm.ws.naming.util.Helpers.processSerializedOb jectForLookupExt(Helpers.java:896)
[29/10/08 12:13:00:154 CET] 0000002f SystemErr R ... 41 more

What we are doing wrong??

After read all documentaion about Activity Sessions, we don't know how continue... and we need your help.