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java.lang.NullPointerException: 	at oracle.discoiv.session.model.Authentication.(Authentication.java:87)	at oracle.discoiv.session.model.ConnectionManager.findConnection(ConnectionManager.java:306)	at oracle.discoiv.session.model.ConnectionManager.findConnection(ConnectionManager.java:277)	at oracle.discoiv.session.model.ConnectionManager.getConnection(ConnectionManager.java:74)	at oracle.discoiv.session.model.ModelSession.openConnection(ModelSession.java:272)	at oracle.discoiv.session.model.ModelSession.openAccount(ModelSession.java:331)	at oracle.discoiv.state.LoginTransition.doTransition(LoginTransition.java:62)	at oracle.discoiv.state.StateTransition.execute(StateTransition.java:37)	at oracle.discoiv.state.StateTransition.execute(StateTransition.java:46)	at oracle.discoiv.state.DiscoState.getState(DiscoState.java:155)	at oracle.discoiv.state.DiscoState.getState(DiscoState.java:52)	at oracle.discoiv.state.StateMachine.setState(StateMachine.java:75)	at oracle.discoiv.controller.DiscovererController.setState(DiscovererController.java:236)	at oracle.discoiv.servlet.DiscovererHttpHandler.processRequest(DiscovererHttpHandler.java:101)	at oracle.discoiv.servlet.DiscoServlet.doRequest(DiscoServlet.java:314)	at oracle.discoiv.servlet.DiscoServlet.doGet(DiscoServlet.java:148)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:244)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)	at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:59)	at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)	at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:523)	at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)	at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:219)	at oracle.plus.servlet.Disco4iProxyServlet.doRequest(Disco4iProxyServlet.java:141)	at oracle.plus.servlet.Disco4iProxyServlet.doGet(Disco4iProxyServlet.java:68)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:244)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)	at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:59)	at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)	at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:523)	at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)	at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:735)	at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:151)	at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)