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java.lang.NullPointerException: 	at org.oscm.ui.beans.UserBean.login(UserBean.java:454)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:601)	at com.sun.el.parser.AstValue.invoke(AstValue.java:254)	at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302)	at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)	at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)	at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:101)	at org.oscm.ui.common.ExceptionActionListener.processAction(ExceptionActionListener.java:41)	at org.omnifaces.eventlistener.ResetInputAjaxActionListener.processAction(ResetInputAjaxActionListener.java:197)	at javax.faces.component.UICommand.broadcast(UICommand.java:315)	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:786)	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1251)	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)	at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.oscm.ui.filter.AuthorizationFilter.proceedWithFilterChain(AuthorizationFilter.java:262)	at org.oscm.ui.filter.AuthorizationFilter.doFilter(AuthorizationFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.oscm.ui.filter.NonexistentConversationFilter.doFilter(NonexistentConversationFilter.java:37)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.oscm.ui.filter.MarketplaceContextFilter.doFilter(MarketplaceContextFilter.java:116)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:807)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:671)	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:505)	at org.apache.catalina.core.ApplicationDispatcher.doDispatch(ApplicationDispatcher.java:476)	at org.apache.catalina.core.ApplicationDispatcher.dispatch(ApplicationDispatcher.java:355)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:305)	at org.oscm.ui.filter.RequestRedirector.forward(RequestRedirector.java:45)	at org.oscm.ui.filter.ClosedMarketplaceFilter.doFilter(ClosedMarketplaceFilter.java:98)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.oscm.ui.filter.IdPResponseFilter.doFilter(IdPResponseFilter.java:146)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.oscm.ui.filter.HttpMethodFilter.doFilter(HttpMethodFilter.java:69)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.oscm.ui.filter.DisableUrlSessionFilter.doFilter(DisableUrlSessionFilter.java:50)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)	at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)	at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)	at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)	at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)	at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)	at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)	at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)	at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)	at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)	at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)	at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)	at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)	at com.sun.grizzly.ContextTask.run(ContextTask.java:71)	at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)	at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)	at java.lang.Thread.run(Thread.java:722)