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java.lang.NullPointerException: 	at com.sun.web.admin.configlib.LdapDatabase.isUserGroupMgmtSupported(LdapDatabase.java:161)	at com.sun.web.admin.mbeans.UserGroupMBean.isUserGroupMgmtSupported(UserGroupMBean.java:244)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.sun.web.admin.mbeans.BaseAdminMBean.invoke(BaseAdminMBean.java:49)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:836)	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:761)	at com.sun.web.admin.gui.util.MBeanUtil.invoke(MBeanUtil.java:139)	at com.sun.web.admin.gui.util.MBeanUtil.invoke(MBeanUtil.java:39)	at com.sun.web.admin.gui.handlers.CommonHandlers.invokeMBean(CommonHandlers.java:66)	at com.sun.web.admin.gui.handlers.CommonHandlers.invokeWizardMBean(CommonHandlers.java:170)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewHelper.invokeHandler(DescriptorViewHelper.java:938)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewHelper.invokeHandlers(DescriptorViewHelper.java:875)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewHelper.dispatchEvent(DescriptorViewHelper.java:841)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewHelper.beginChildDisplay(DescriptorViewHelper.java:477)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewBeanBase.beginChildDisplay(DescriptorViewBeanBase.java:168)	at com.iplanet.jato.taglib.TagBase.fireBeginDisplayEvent(TagBase.java:133)	at com.sun.web.ui.taglib.common.CCTagBase.fireBeginDisplayEvent(CCTagBase.java:149)	at com.sun.web.ui.taglib.common.CCTagBase.doEndTag(CCTagBase.java:108)	at org.apache.jsp.jsp.addGroupMembers_jsp._jspx_meth_cc_propertysheet_0(addGroupMembers_jsp.java:347)	at org.apache.jsp.jsp.addGroupMembers_jsp._jspx_meth_cc_pagetitle_0(addGroupMembers_jsp.java:317)	at org.apache.jsp.jsp.addGroupMembers_jsp._jspx_meth_cc_form_0(addGroupMembers_jsp.java:201)	at org.apache.jsp.jsp.addGroupMembers_jsp._jspx_meth_cc_header_0(addGroupMembers_jsp.java:154)	at org.apache.jsp.jsp.addGroupMembers_jsp._jspService(addGroupMembers_jsp.java:99)	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:80)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:917)	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:457)	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:351)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:917)	at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:398)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:792)	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:472)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:353)	at com.iplanet.jato.view.ViewBeanBase.forward(ViewBeanBase.java:340)	at com.iplanet.jato.view.ViewBeanBase.forwardTo(ViewBeanBase.java:261)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewHelper.execute(DescriptorViewHelper.java:338)	at com.sun.enterprise.tools.guiframework.view.DescriptorViewBeanBase.execute(DescriptorViewBeanBase.java:210)	at com.iplanet.jato.view.RequestHandlingViewBase.handleRequest(RequestHandlingViewBase.java:308)