Hello Friends,
Does anyone experinced this issue before or any suggestions on resolving this issue would be greatly appreciated.
I am getting below error when try to look at the users under the group from UserManagement ->Roles → Members
If I serach for the same group under Usermanagement → groups → and click on group members I am able to see all users.

MWS Version:
Version: 8.2.1.0.464
Build Date: 2013-09-19
Installed Fixes: MWS_8.2_SP1_Fix14,MWS_8.2_SP1_Fix4

error:
[lk33buzhitm5l5uw13zzo8he:Administrator] - http://XXXX:XXXX/directory/XXXX/group/meta/default/group/0000010335 (GET)
(Framework:INFO) [RID:3013] - [POP.001.0002] A “javax.portlet.PortletException” occurred with the Message “at app.tabs.TabsPortlet.doView(TabsPortlet.java:137)”
javax.portlet.PortletException
at app.tabs.TabsPortlet.doView(TabsPortlet.java:137)
at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:290)
at javax.portlet.GenericPortlet.render(GenericPortlet.java:218)
at com.webMethods.portal.framework.portletcontainer.impl.PortletApplicationHandler.process(PortletApplicationHandler.java:495)
at com.webMethods.portal.framework.portletcontainer.servlet.PortletServlet.service(PortletServlet.java:58)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.servlet.Dispatcher.include(Dispatcher.java:192)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.dispatch(PortletContainer.java:221)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.process(PortletContainer.java:130)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.renderPortlet(PortletContainer.java:103)
at com.webMethods.portal.framework.portletcontainer.beans.PortletBean.processRequest(PortletBean.java:193)
at com.webMethods.portal.framework.portletcontainer.beans.PortletBean.getContentInternal(PortletBean.java:82)
at com.webMethods.portal.framework.portlet.beans.BasicPortletBean.getContent(BasicPortletBean.java:151)
at com.webMethods.portal.mech.portlet.impl.PortletMechanics.getPortletContent(PortletMechanics.java:96)
at com.webMethods.portal.mech.storage.page.PortletHelper.renderContent(PortletHelper.java:430)
at com.webMethods.portal.mech.storage.page.PortletHelper.renderContent(PortletHelper.java:402)
at com.webMethods.portal.framework.presentation.renderers.ShellSubRenderer.renderPortlet(ShellSubRenderer.java:117)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:430)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:434)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:434)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderContent(PortalPageSubRenderer.java:142)
at com.webMethods.portal.framework.presentation.renderers.ShellSubRenderer.subrender(ShellSubRenderer.java:77)
at com.webMethods.portal.framework.presentation.renderers.DefaultRenderer.renderPageStart(DefaultRenderer.java:302)
at com.webMethods.portal.framework.presentation.renderers.DefaultRenderer.render(DefaultRenderer.java:264)
at com.webMethods.portal.framework.presentation.PresentationManager.handlePres(PresentationManager.java:389)
at com.webMethods.portal.framework.dispatch.DispatchManager.pres(DispatchManager.java:640)
at com.webMethods.portal.framework.dispatch.DispatchManager.handle(DispatchManager.java:470)
at com.webMethods.portal.framework.dispatch.DispatchManager.handleDispatch(DispatchManager.java:381)
at com.webMethods.portal.framework.impl.PortalServlet.service(PortalServlet.java:305)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.webMethods.portal.framework.impl.NTLMV1Filter.doFilter(NTLMV1Filter.java:50)
at com.webMethods.portal.framework.impl.NTLMFilter.doFilter(NTLMFilter.java:28)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.webMethods.caf.faces.servlet.GZIPFilter.doFilter(GZIPFilter.java:47)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.webMethods.portal.framework.impl.RequestFilter.doFilter(RequestFilter.java:56)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:451)
Caused by: com.webMethods.portal.bizPolicy.BizException: [POP.001.0002] A “java.lang.ClassCastException” occurred with the Message “com.webMethods.portal.portlet.wm_xt_ldapdirsvc.mechanics.LdapdirgroupMechanics cannot be cast to com.webMethods.portal.mech.storage.IBasicMechanics”
at com.webMethods.portal.bizPolicy.command.meta.CanUser.canUser(CanUser.java:76)
at com.webMethods.portal.bizPolicy.biz.meta.impl.BasicPolicy.canUser(BasicPolicy.java:305)
at com.webMethods.portal.noodle.util.NoodleUtils.canUser(NoodleUtils.java:276)
at com.webMethods.portal.noodle.util.NoodleUtils.getView(NoodleUtils.java:295)
at com.webMethods.portal.noodle.tabset.impl.UserTabSetService.processRequest(UserTabSetService.java:277)
at app.tabs.TabsPortlet.doView(TabsPortlet.java:51)
… 63 more
Caused by: java.lang.ClassCastException: com.webMethods.portal.portlet.wm_xt_ldapdirsvc.mechanics.LdapdirgroupMechanics cannot be cast to com.webMethods.portal.mech.storage.IBasicMechanics
at com.webMethods.portal.bizPolicy.command.meta.CanUser.canUser(CanUser.java:72)
… 68 more
Nested Exception is
java.lang.ClassCastException: com.webMethods.portal.portlet.wm_xt_ldapdirsvc.mechanics.LdapdirgroupMechanics cannot be cast to com.webMethods.portal.mech.storage.IBasicMechanics
at com.webMethods.portal.bizPolicy.command.meta.CanUser.canUser(CanUser.java:72)
at com.webMethods.portal.bizPolicy.biz.meta.impl.BasicPolicy.canUser(BasicPolicy.java:305)
at com.webMethods.portal.noodle.util.NoodleUtils.canUser(NoodleUtils.java:276)
at com.webMethods.portal.noodle.util.NoodleUtils.getView(NoodleUtils.java:295)
at com.webMethods.portal.noodle.tabset.impl.UserTabSetService.processRequest(UserTabSetService.java:277)
at app.tabs.TabsPortlet.doView(TabsPortlet.java:51)
at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:290)
at javax.portlet.GenericPortlet.render(GenericPortlet.java:218)
at com.webMethods.portal.framework.portletcontainer.impl.PortletApplicationHandler.process(PortletApplicationHandler.java:495)
at com.webMethods.portal.framework.portletcontainer.servlet.PortletServlet.service(PortletServlet.java:58)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.servlet.Dispatcher.include(Dispatcher.java:192)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.dispatch(PortletContainer.java:221)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.process(PortletContainer.java:130)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.renderPortlet(PortletContainer.java:103)
at com.webMethods.portal.framework.portletcontainer.beans.PortletBean.processRequest(PortletBean.java:193)
at com.webMethods.portal.framework.portletcontainer.beans.PortletBean.getContentInternal(PortletBean.java:82)
at com.webMethods.portal.framework.portlet.beans.BasicPortletBean.getContent(BasicPortletBean.java:151)
at com.webMethods.portal.mech.portlet.impl.PortletMechanics.getPortletContent(PortletMechanics.java:96)
at com.webMethods.portal.mech.storage.page.PortletHelper.renderContent(PortletHelper.java:430)
at com.webMethods.portal.mech.storage.page.PortletHelper.renderContent(PortletHelper.java:402)
at com.webMethods.portal.framework.presentation.renderers.ShellSubRenderer.renderPortlet(ShellSubRenderer.java:117)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:430)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:434)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:434)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderContent(PortalPageSubRenderer.java:142)
at com.webMethods.portal.framework.presentation.renderers.ShellSubRenderer.subrender(ShellSubRenderer.java:77)
at com.webMethods.portal.framework.presentation.renderers.DefaultRenderer.renderPageStart(DefaultRenderer.java:302)
at com.webMethods.portal.framework.presentation.renderers.DefaultRenderer.render(DefaultRenderer.java:264)
at com.webMethods.portal.framework.presentation.PresentationManager.handlePres(PresentationManager.java:389)
at com.webMethods.portal.framework.dispatch.DispatchManager.pres(DispatchManager.java:640)
at com.webMethods.portal.framework.dispatch.DispatchManager.handle(DispatchManager.java:470)
at com.webMethods.portal.framework.dispatch.DispatchManager.handleDispatch(DispatchManager.java:381)
at com.webMethods.portal.framework.impl.PortalServlet.service(PortalServlet.java:305)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.webMethods.portal.framework.impl.NTLMV1Filter.doFilter(NTLMV1Filter.java:50)
at com.webMethods.portal.framework.impl.NTLMFilter.doFilter(NTLMFilter.java:28)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.webMethods.caf.faces.servlet.GZIPFilter.doFilter(GZIPFilter.java:47)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.webMethods.portal.framework.impl.RequestFilter.doFilter(RequestFilter.java:56)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:451)

(jsf:ERROR) [RID:3013] -
java.lang.ClassCastException: com.webMethods.portal.portlet.wm_xt_ldapdirsvc.mechanics.LdapdirgroupMechanics cannot be cast to com.webMethods.portal.mech.storage.IBasicMechanics
at com.webMethods.portal.bizPolicy.command.meta.CanUser.canUser(CanUser.java:72)
at com.webMethods.portal.bizPolicy.biz.meta.impl.BasicPolicy.canUser(BasicPolicy.java:305)
at com.webMethods.portal.noodle.util.NoodleUtils.canUser(NoodleUtils.java:276)
at com.webMethods.portal.noodle.util.NoodleUtils.getView(NoodleUtils.java:295)
at com.webMethods.portal.noodle.util.NoodleUtils.getView(NoodleUtils.java:321)
at com.webMethods.caf.pageheader.PageHeaderPortlet.getPage(PageHeaderPortlet.java:107)
at com.webMethods.caf.pageheader.PageHeaderPortlet.doView(PageHeaderPortlet.java:42)
at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:290)
at javax.portlet.GenericPortlet.render(GenericPortlet.java:218)
at com.webMethods.portal.framework.portletcontainer.impl.PortletApplicationHandler.process(PortletApplicationHandler.java:495)
at com.webMethods.portal.framework.portletcontainer.servlet.PortletServlet.service(PortletServlet.java:58)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:390)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.servlet.Dispatcher.include(Dispatcher.java:192)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.dispatch(PortletContainer.java:221)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.process(PortletContainer.java:130)
at com.webMethods.portal.framework.portletcontainer.PortletContainer.renderPortlet(PortletContainer.java:103)
at com.webMethods.portal.framework.portletcontainer.beans.PortletBean.processRequest(PortletBean.java:193)
at com.webMethods.portal.framework.portletcontainer.beans.PortletBean.getContentInternal(PortletBean.java:82)
at com.webMethods.portal.framework.portlet.beans.BasicPortletBean.getContent(BasicPortletBean.java:151)
at com.webMethods.portal.mech.portlet.impl.PortletMechanics.getPortletContent(PortletMechanics.java:96)
at com.webMethods.portal.mech.storage.page.PortletHelper.renderContent(PortletHelper.java:430)
at com.webMethods.portal.mech.storage.page.PortletHelper.renderContent(PortletHelper.java:402)
at com.webMethods.portal.framework.presentation.renderers.ShellSubRenderer.renderPortlet(ShellSubRenderer.java:117)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:430)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:434)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderColumn(PortalPageSubRenderer.java:434)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderRow(PortalPageSubRenderer.java:286)
at com.webMethods.portal.framework.presentation.renderers.PortalPageSubRenderer.renderContent(PortalPageSubRenderer.java:142)
at com.webMethods.portal.framework.presentation.renderers.ShellSubRenderer.subrender(ShellSubRenderer.java:77)
at com.webMethods.portal.framework.presentation.renderers.DefaultRenderer.renderPageStart(DefaultRenderer.java:302)
at com.webMethods.portal.framework.presentation.renderers.DefaultRenderer.render(DefaultRenderer.java:264)
at com.webMethods.portal.framework.presentation.PresentationManager.handlePres(PresentationManager.java:389)
at com.webMethods.portal.framework.dispatch.DispatchManager.pres(DispatchManager.java:640)
at com.webMethods.portal.framework.dispatch.DispatchManager.handle(DispatchManager.java:470)
at com.webMethods.portal.framework.dispatch.DispatchManager.handleDispatch(DispatchManager.java:381)
at com.webMethods.portal.framework.impl.PortalServlet.service(PortalServlet.java:305)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
at com.webMethods.portal.framework.impl.NTLMV1Filter.doFilter(NTLMV1Filter.java:50)
at com.webMethods.portal.framework.impl.NTLMFilter.doFilter(NTLMFilter.java:28)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.webMethods.caf.faces.servlet.GZIPFilter.doFilter(GZIPFilter.java:47)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.webMethods.portal.framework.impl.RequestFilter.doFilter(RequestFilter.java:56)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:451)

Thanks,
Mahesh

Hi Mahesh,

I do not know if you managed to fix the problem in the mean time.

I experienced a similar problem. The root cause was that I was trying to access a group that had no members. I think this was a framework defect, that maybe fixed in the later versions (I am using 8.2)

Hope it helps,
Vlad Turian