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java.lang.NullPointerException: 	at weblogic.security.acl.internal.Security.verify(Security.java:54)	at weblogic.jndi.WLInitialContextFactory.pushUser(WLInitialContextFactory.java:424)	at weblogic.jndi.WLInitialContextFactory.newContext(WLInitialContextFactory.java:322)	at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:277)	at weblogic.jndi.Environment.getContext(Environment.java:128)	at weblogic.jndi.Environment.getInitialContext(Environment.java:111)	at weblogic.service.BasicReplicaList.forceRefresh(BasicReplicaList.java:186)	at weblogic.service.BasicReplicaList.refresh(BasicReplicaList.java:173)	at weblogic.service.BasicReplicaHandler.refreshReplicaList(BasicReplicaHandler.java:325)	at weblogic.service.BasicReplicaHandler.loadBalance(BasicReplicaHandler.java:223)	at weblogic.service.BasicServiceStub._wl_loadBalance(BasicServiceStub.java:109)	at weblogic.service.BasicServiceStub._wl_autoLoadBalance(BasicServiceStub.java:133)	at com.covad.common.ejb.finder.server.EJBFinderBeanEOImpl_ServiceStub.getAttributes(EJBFinderBeanEOImpl_ServiceStub.java:315)	at com.covad.inventory.pair.client.COSelector$COExpansionListener.addCOs(COSelector.java:90)	at com.covad.inventory.pair.client.COSelector$COExpansionListener.treeExpanded(COSelector.java:64)	at javax.swing.JTree.fireTreeExpanded(JTree.java:1925)	at javax.swing.JTree.setExpandedState(JTree.java:2568)	at javax.swing.JTree.expandPath(JTree.java:1467)	at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(BasicTreeUI.java:1928)