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The method null.listRolesForResource could not be found
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The method null.userExists could not be found
javax.management.ReflectionException: The method null.listRolesForResource could not be found	at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:1298)	at weblogic.management.commo.CommoModelMBean.invoke(CommoModelMBean.java:555)	at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1560)	at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1528)	at weblogic.management.internal.RemoteMBeanServerImpl.private_invoke(RemoteMBeanServerImpl.java:988)	at weblogic.management.internal.RemoteMBeanServerImpl.invoke(RemoteMBeanServerImpl.java:946)	at weblogic.management.console.utils.Security.getRoleList(Security.java:1933)	at weblogic.management.console.actions.security.ListRolesAction.updateContents(ListRolesAction.java:84)	at weblogic.management.console.actions.security.ListLWSecurityAction.getContents(ListLWSecurityAction.java:85)	at weblogic.management.console.tags.security.LWTableTag.getRowData(LWTableTag.java:462)	at weblogic.management.console.tags.security.LWTableTag.printTable(LWTableTag.java:141)	at weblogic.management.console.tags.security.LWTableTag.doEndTag(LWTableTag.java:133)	at weblogic.management.console.webapp._security.__roletable._jspService(__roletable.java:401)	at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)	at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)	at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:322)	at weblogic.servlet.jsp.PageContextImpl.forward(PageContextImpl.java:150)	at weblogic.management.console.actions.ForwardAction.perform(ForwardAction.java:35)	at weblogic.management.console.actions.internal.ActionServlet.doAction(ActionServlet.java:173)	at weblogic.management.console.actions.internal.ActionServlet.doGet(ActionServlet.java:91)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)	at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1006)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6718)	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)