I'm seeing this error out of the blue. Does anybody have any idea as to what maybe causing it? There has been no change to the code and this same piece of code has been working fine for months.
thanks in advance. java.lang.NullPointerException at org.displaytag.model.RowSorter.checkNullsAndCompare(RowSorter.java:176) at org.displaytag.model.RowSorter.compare(RowSorter.java:144) at java.util.Arrays.mergeSort(Arrays.java:1278) at java.util.Arrays.mergeSort(Arrays.java:1289) at java.util.Arrays.mergeSort(Arrays.java:1289) at java.util.Arrays.mergeSort(Arrays.java:1289) at java.util.Arrays.mergeSort(Arrays.java:1289) at java.util.Arrays.sort(Arrays.java:1219) at java.util.Collections.sort(Collections.java:155) at org.displaytag.model.TableModel.sortRowList(TableModel.java:451) at org.displaytag.model.TableModel.sortFullList(TableModel.java:486) at org.displaytag.tags.TableTag.setupViewableData(TableTag.java:1506) at org.displaytag.tags.TableTag.doEndTag(TableTag.java:1198) at _web_2d_inf._pages._rosterperson._ListRosterPerson._jspService(_ListRost erPerson.java:3328) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:281) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:498) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:402) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestD ispatcher.java:835) at com.evermind.server.http.ServletRequestDispatcher.include(ServletRequest Dispatcher.java:127) at com.evermind.server.http.EvermindPageContext.include(EvermindPageContext .java:271) at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:137) at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:177) at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:756) at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTa g.java:881) at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:473) at _web_2d_inf._pages._common._tiles._TilesCommonLayout._jspService(_TilesC ommonLayout.java:111) at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56) at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:281) at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:498) at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:402) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestD ispatcher.java:835) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(Servle tRequestDispatcher.java:341) at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequest Dispatcher.java:230) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.jav a:1069) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProc essor.java:274) at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(Til esRequestProcessor.java:254) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(Tiles RequestProcessor.java:309) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 279) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChai n.java:65) at mil.osd.dmdc.deers.web.security.authagent.filters.OperatorAuthorizationF ilter.doFilter(OperatorAuthorizationFilter.java:149) at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChai n.java:16) at mil.osd.dmdc.deers.web.security.authagent.filters.OperatorAuthentication Filter.doFilter(OperatorAuthenticationFilter.java:139) at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChai n.java:20) at mil.osd.dmdc.deers.web.security.authagent.filters.AbstractConsentFilter. doFilter(AbstractConsentFilter.java:138) at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChai n.java:20) at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFi lter.java:125) at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestD ispatcher.java:670) at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(Servle tRequestDispatcher.java:341) at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHa ndler.java:816) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:23 1) at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:13 6) at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(Releasab leResourcePooledExecutor.java:192) at java.lang.Thread.run(Thread.java:534) ------------------------------------------------------------------------------ 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