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java.lang.NullPointerException: 	at com.iplanet.dpro.session.service.SessionService.generateEncryptedID(SessionService.java:605)	at com.iplanet.dpro.session.service.SessionService.generateSessionId(SessionService.java:629)	at com.iplanet.dpro.session.service.SessionService.newInternalSession(SessionService.java:573)	at com.iplanet.dpro.session.service.SessionService.getServiceSession(SessionService.java:517)	at com.iplanet.dpro.session.service.SessionService.getAuthenticationSession(SessionService.java:424)	at com.sun.identity.authentication.service.AuthD.initAuthSessions(AuthD.java:720)	at com.sun.identity.authentication.service.AuthD.(AuthD.java:229)	at com.sun.identity.authentication.service.AuthD.getAuth(AuthD.java:488)	at com.sun.identity.authentication.UI.LoginLogoutMapping.init(LoginLogoutMapping.java:71)	at weblogic.servlet.internal.ServletStubImpl$ServletInitAction.run(ServletStubImpl.java:1099)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)	at weblogic.servlet.internal.ServletStubImpl.createServlet(ServletStubImpl.java:975)	at weblogic.servlet.internal.ServletStubImpl.createInstances(ServletStubImpl.java:954)	at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:893)	at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:3456)	at weblogic.servlet.internal.WebAppServletContext.preloadServlets(WebAppServletContext.java:3413)	at weblogic.servlet.internal.WebAppServletContext.preloadServlets(WebAppServletContext.java:3399)	at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:3382)	at weblogic.servlet.internal.WebAppServletContext.setStarted(WebAppServletContext.java:6262)	at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:892)	at weblogic.j2ee.J2EEApplicationContainer.start(J2EEApplicationContainer.java:2181)	at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:2222)	at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:2169)	at weblogic.management.deploy.slave.SlaveDeployer$Application.setActivation(SlaveDeployer.java:3111)	at weblogic.management.deploy.slave.SlaveDeployer.setActivationStateForAllApplications(SlaveDeployer.java:1769)	at weblogic.management.deploy.slave.SlaveDeployer.resume(SlaveDeployer.java:352)	at weblogic.management.deploy.DeploymentManagerServerLifeCycleImpl.resume(DeploymentManagerServerLifeCycleImpl.java:229)	at weblogic.t3.srvr.SubsystemManager.resume(SubsystemManager.java:136)	at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:965)	at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:360)	at weblogic.Server.main(Server.java:32)