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java.lang.NullPointerException at java.lang.String.compareTo(String.java:998) at java.lang.String.compareTo(String.java:90) at java.util.TreeMap.compare(TreeMap.java:1093) at java.util.TreeMap.getEntry(TreeMap.java:347) at java.util.TreeMap.get(TreeMap.java:265) at org.apache.turbine.util.security.GroupSet.getGroupByName(GroupSet.java:173) at org.apache.turbine.services.security.BaseSecurityService.getGlobalGroup(BaseSecurityService.java:961) at org.apache.turbine.services.security.TurbineSecurity.getGlobalGroup(TurbineSecurity.java:595) at org.apache.turbine.util.security.TurbineAccessControlList.getPermissions(TurbineAccessControlList.java:148) at de.tewisoft.aloe.turbine.ACLTool.init(ACLTool.java:43) at org.apache.turbine.services.pull.TurbinePullService.initTool(TurbinePullService.java:736) at org.apache.turbine.services.pull.TurbinePullService.populateWithRequestTools(TurbinePullService.java:456) at org.apache.turbine.services.pull.TurbinePullService.populateContext(TurbinePullService.java:378) at org.apache.turbine.services.velocity.TurbineVelocityService.getContext(TurbineVelocityService.java:250) at org.apache.turbine.services.velocity.TurbineVelocity.getContext(TurbineVelocity.java:122) at org.apache.turbine.modules.pages.VelocityPage.doBuildBeforeAction(VelocityPage.java:50) at org.apache.turbine.modules.pages.DefaultPage.doBuild(DefaultPage.java:110) at org.apache.turbine.modules.Page.build(Page.java:56) at org.apache.turbine.modules.PageLoader.exec(PageLoader.java:104) at org.apache.turbine.Turbine.doGet(Turbine.java:796) at javax.servlet.http.HttpServlet.service(HttpServlet.java:690) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:568) at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:421) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:889) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690) at java.lang.Thread.run(Thread.java:595)