Thanks for your help! the first solution with the context lookup is working just fine! the latter solution does not work and it throws a NullPointerException in both use cases (for existing and non existing user). I only tried it in portal 2.6.2. | ex.getMessage() : null | ex.getLocalizedMessage() : null | java.lang.NullPointerException | at portal.portlet.useradminportlet.ServiceBean.findUserByUserName(Unknown Source) | at portal.portlet.useradminportlet.ServiceBean.checkUserNameAvailability(Unknown Source) | at portal.portlet.useradminportlet.ServiceBean.checkUserDetailsForEntry(Unknown Source) | at portal.portlet.useradminportlet.ServiceBean.toAddUserAccess(Unknown Source) | 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:585) | at org.apache.el.parser.AstValue.invoke(AstValue.java:131) | at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) | at org.apache.jasper.el.JspMethodExpression.invoke(JspMethodExpression.java:68) | at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77) | at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91) | at javax.faces.component.UICommand.broadcast(UICommand.java:383) | at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447) | at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752) | at teamdev.jsf.m.processApplication(SourceFile:146) | at com.sun.faces.portlet.LifecycleImpl$InvokeApplicationPhase.execute(LifecycleImpl.java:664) | at com.sun.faces.portlet.LifecycleImpl.phase(LifecycleImpl.java:330) | at com.sun.faces.portlet.LifecycleImpl.execute(LifecycleImpl.java:246) | at com.sun.faces.portlet.FacesPortlet.processAction(FacesPortlet.java:220) | at org.jboss.portal.portlet.impl.jsr168.PortletContainerImpl.invokeAction(PortletContainerImpl.java:458) | at org.jboss.portal.portlet.impl.jsr168.PortletContainerImpl.dispatch(PortletContainerImpl.java:401) | at org.jboss.portal.portlet.container.PortletContainerInvoker$1.invoke(PortletContainerInvoker.java:86) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:131) | at org.jboss.portal.core.aspects.portlet.TransactionInterceptor.org$jboss$portal$core$aspects$portlet$TransactionInterceptor$invokeNotSupported$aop(TransactionInterceptor.java:86) | at org.jboss.portal.core.aspects.portlet.TransactionInterceptor$invokeNotSupported_N4547270787964792031.invokeNext(TransactionInterceptor$invokeNotSupported_N4547270787964792031.java) | at org.jboss.aspects.tx.TxPolicy.invokeInNoTx(TxPolicy.java:66) | at org.jboss.aspects.tx.TxInterceptor$NotSupported.invoke(TxInterceptor.java:112) | at org.jboss.portal.core.aspects.portlet.TransactionInterceptor$invokeNotSupported_N4547270787964792031.invokeNext(TransactionInterceptor$invokeNotSupported_N4547270787964792031.java) | at org.jboss.aspects.tx.TxPolicy.invokeInNoTx(TxPolicy.java:66) | at org.jboss.aspects.tx.TxInterceptor$NotSupported.invoke(TxInterceptor.java:102) | at org.jboss.portal.core.aspects.portlet.TransactionInterceptor$invokeNotSupported_N4547270787964792031.invokeNext(TransactionInterceptor$invokeNotSupported_N4547270787964792031.java) | at org.jboss.portal.core.aspects.portlet.TransactionInterceptor.invokeNotSupported(TransactionInterceptor.java) | at org.jboss.portal.core.aspects.portlet.TransactionInterceptor.invoke(TransactionInterceptor.java:56) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.portlet.HeaderInterceptor.invoke(HeaderInterceptor.java:50) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.ProducerCacheInterceptor.invoke(ProducerCacheInterceptor.java:53) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.portlet.AjaxInterceptor.invoke(AjaxInterceptor.java:51) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.ModesInterceptor.invoke(ModesInterceptor.java:62) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.bridge.BridgeInterceptor.invoke(BridgeInterceptor.java:47) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.WindowStatesInterceptor.invoke(WindowStatesInterceptor.java:55) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.PortletSessionSynchronizationInterceptor.invoke(PortletSessionSynchronizationInterceptor.java:80) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.ContextTrackerInterceptor.invoke(ContextTrackerInterceptor.java:46) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.ContextDispatcherInterceptor$1.doCallback(ContextDispatcherInterceptor.java:104) | at org.jboss.portal.web.command.CommandDispatcher$CallbackCommand.execute(CommandDispatcher.java:74) | 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:585) | at org.jboss.portal.web.command.CommandServlet.doGet(CommandServlet.java:131) | at org.jboss.portal.web.command.CommandServlet.doPost(CommandServlet.java:162) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) | at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:687) | at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:590) | at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:505) | at org.jboss.portal.web.command.CommandServlet.include(CommandServlet.java:80) | at org.jboss.portal.web.command.CommandDispatcher.include(CommandDispatcher.java:50) | at org.jboss.portal.web.jboss.JBossWebContext.include(JBossWebContext.java:65) | at org.jboss.portal.web.ServletContainer.include(ServletContainer.java:182) | at org.jboss.portal.portlet.impl.spi.AbstractRequestContext.dispatch(AbstractRequestContext.java:81) | at org.jboss.portal.portlet.aspects.portlet.ContextDispatcherInterceptor.invoke(ContextDispatcherInterceptor.java:76) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.SecureTransportInterceptor.invoke(SecureTransportInterceptor.java:68) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.ValveInterceptor.invoke(ValveInterceptor.java:60) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.common.invocation.Invocation.invoke(Invocation.java:157) | at org.jboss.portal.portlet.container.PortletContainerInvoker.invoke(PortletContainerInvoker.java:198) | at org.jboss.portal.portlet.state.producer.ProducerPortletInvoker.invoke(ProducerPortletInvoker.java:233) | at org.jboss.portal.core.impl.portlet.state.ProducerPortletInvoker.org$jboss$portal$core$impl$portlet$state$ProducerPortletInvoker$invoke$aop(ProducerPortletInvoker.java:53) | at org.jboss.portal.core.impl.portlet.state.ProducerPortletInvoker$invoke_N8654503705355129869.invokeNext(ProducerPortletInvoker$invoke_N8654503705355129869.java) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) | at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195) | at org.jboss.portal.core.impl.portlet.state.ProducerPortletInvoker$invoke_N8654503705355129869.invokeNext(ProducerPortletInvoker$invoke_N8654503705355129869.java) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) | at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195) | at org.jboss.portal.core.impl.portlet.state.ProducerPortletInvoker$invoke_N8654503705355129869.invokeNext(ProducerPortletInvoker$invoke_N8654503705355129869.java) | at org.jboss.portal.core.impl.portlet.state.ProducerPortletInvoker.invoke(ProducerPortletInvoker.java) | at org.jboss.portal.portlet.federation.impl.FederatedPortletInvokerService.invoke(FederatedPortletInvokerService.java:147) | at org.jboss.portal.portlet.federation.impl.FederatingPortletInvokerService.invoke(FederatingPortletInvokerService.java:150) | at org.jboss.portal.core.impl.model.instance.InstanceContainerImpl$1.invoke(InstanceContainerImpl.java:98) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:131) | at org.jboss.portal.portlet.management.PortletContainerManagementInterceptorImpl.invoke(PortletContainerManagementInterceptorImpl.java:58) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.PortalSessionSynchronizationInterceptor.invoke(PortalSessionSynchronizationInterceptor.java:116) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.model.instance.InstanceSecurityInterceptor.invoke(InstanceSecurityInterceptor.java:91) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.portlet.aspects.portlet.ConsumerCacheInterceptor.invoke(ConsumerCacheInterceptor.java:175) | at org.jboss.portal.portlet.invocation.PortletInterceptor.invoke(PortletInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.common.invocation.Invocation.invoke(Invocation.java:157) | at org.jboss.portal.core.impl.model.instance.InstanceContainerImpl.org$jboss$portal$core$impl$model$instance$InstanceContainerImpl$invoke$aop(InstanceContainerImpl.java:413) | at org.jboss.portal.core.impl.model.instance.InstanceContainerImpl$invoke_N8654503705355129869.invokeNext(InstanceContainerImpl$invoke_N8654503705355129869.java) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) | at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195) | at org.jboss.portal.core.impl.model.instance.InstanceContainerImpl$invoke_N8654503705355129869.invokeNext(InstanceContainerImpl$invoke_N8654503705355129869.java) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) | at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195) | at org.jboss.portal.core.impl.model.instance.InstanceContainerImpl$invoke_N8654503705355129869.invokeNext(InstanceContainerImpl$invoke_N8654503705355129869.java) | at org.jboss.portal.core.impl.model.instance.InstanceContainerImpl.invoke(InstanceContainerImpl.java) | at org.jboss.portal.core.impl.model.instance.AbstractInstance.invoke(AbstractInstance.java:234) | at org.jboss.portal.core.model.portal.command.action.InvokePortletWindowActionCommand.execute(InvokePortletWindowActionCommand.java:174) | at org.jboss.portal.core.controller.ControllerCommand$1.invoke(ControllerCommand.java:68) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:131) | at org.jboss.portal.core.aspects.controller.node.EventBroadcasterInterceptor.invoke(EventBroadcasterInterceptor.java:123) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.controller.ControlInterceptor.invoke(ControlInterceptor.java:57) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.controller.PageCustomizerInterceptor.invoke(PageCustomizerInterceptor.java:133) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.controller.PolicyEnforcementInterceptor.invoke(PolicyEnforcementInterceptor.java:77) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.controller.node.PortalNodeInterceptor.invoke(PortalNodeInterceptor.java:81) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.controller.NavigationalStateInterceptor.invoke(NavigationalStateInterceptor.java:42) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.controller.ajax.AjaxInterceptor.invoke(AjaxInterceptor.java:51) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.controller.ResourceAcquisitionInterceptor.invoke(ResourceAcquisitionInterceptor.java:50) | at org.jboss.portal.core.controller.ControllerInterceptor.invoke(ControllerInterceptor.java:40) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.common.invocation.Invocation.invoke(Invocation.java:157) | at org.jboss.portal.core.controller.ControllerContext.execute(ControllerContext.java:134) | at org.jboss.portal.core.controller.Controller.processCommand(Controller.java:235) | at org.jboss.portal.core.controller.Controller.handle(Controller.java:218) | at org.jboss.portal.server.RequestControllerDispatcher.invoke(RequestControllerDispatcher.java:51) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:131) | at org.jboss.portal.core.cms.aspect.IdentityBindingInterceptor.invoke(IdentityBindingInterceptor.java:47) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.server.aspects.server.ContentTypeInterceptor.invoke(ContentTypeInterceptor.java:68) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.server.LocaleInterceptor.invoke(LocaleInterceptor.java:96) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.server.UserInterceptor.invoke(UserInterceptor.java:245) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.server.aspects.server.SignOutInterceptor.invoke(SignOutInterceptor.java:98) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.impl.api.user.UserEventBridgeTriggerInterceptor.invoke(UserEventBridgeTriggerInterceptor.java:65) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.core.aspects.server.TransactionInterceptor.org$jboss$portal$core$aspects$server$TransactionInterceptor$invoke$aop(TransactionInterceptor.java:49) | at org.jboss.portal.core.aspects.server.TransactionInterceptor$invoke_N5143606530999904530.invokeNext(TransactionInterceptor$invoke_N5143606530999904530.java) | at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79) | at org.jboss.aspects.tx.TxInterceptor$RequiresNew.invoke(TxInterceptor.java:253) | at org.jboss.portal.core.aspects.server.TransactionInterceptor$invoke_N5143606530999904530.invokeNext(TransactionInterceptor$invoke_N5143606530999904530.java) | at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79) | at org.jboss.aspects.tx.TxInterceptor$RequiresNew.invoke(TxInterceptor.java:262) | at org.jboss.portal.core.aspects.server.TransactionInterceptor$invoke_N5143606530999904530.invokeNext(TransactionInterceptor$invoke_N5143606530999904530.java) | at org.jboss.portal.core.aspects.server.TransactionInterceptor.invoke(TransactionInterceptor.java) | at org.jboss.portal.server.ServerInterceptor.invoke(ServerInterceptor.java:38) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.server.aspects.LockInterceptor$InternalLock.invoke(LockInterceptor.java:70) | at org.jboss.portal.server.aspects.LockInterceptor.invoke(LockInterceptor.java:131) | at org.jboss.portal.common.invocation.Invocation.invokeNext(Invocation.java:115) | at org.jboss.portal.common.invocation.Invocation.invoke(Invocation.java:157) | at org.jboss.portal.server.servlet.PortalServlet.service(PortalServlet.java:380) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) | at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580) | at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) | at java.lang.Thread.run(Thread.java:595) Again, thx for ur help! 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