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java.lang.IllegalArgumentException: Comparison method violates its general contract!	at java.util.TimSort.mergeLo(TimSort.java:747)	at java.util.TimSort.mergeAt(TimSort.java:483)	at java.util.TimSort.mergeCollapse(TimSort.java:410)	at java.util.TimSort.sort(TimSort.java:214)	at java.util.TimSort.sort(TimSort.java:173)	at java.util.Arrays.sort(Arrays.java:659)	at java.util.Collections.sort(Collections.java:217)	at com.liferay.portal.kernel.util.ListUtil.sort(ListUtil.java:176)	at com.stannah.liferay.portal.search.lucene.LuceneIndexer.doReIndex(LuceneIndexer.java:100)	at com.stannah.liferay.portal.search.lucene.LuceneIndexer.reindex(LuceneIndexer.java:46)	at com.stannah.liferay.portal.search.lucene.LuceneIndexer.reindex(LuceneIndexer.java:39)	at com.stannah.liferay.portal.search.lucene.LucenePortlet.processAction(LucenePortlet.java:22)	at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70)	at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:48)	at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:92)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)	at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:638)	at com.liferay.portlet.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:687)	at com.liferay.portlet.InvokerPortletImpl.processAction(InvokerPortletImpl.java:360)	at com.liferay.portal.action.LayoutAction.processPortletRequest(LayoutAction.java:784)	at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:582)	at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:232)	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)	at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:153)	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)	at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:508)	at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:485)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:309)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:121)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:254)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)	at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:134)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:261)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:110)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:222)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:45)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:254)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:81)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:179)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:240)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196)	at com.liferay.portal.servlet.filters.threadlocal.ThreadLocalFilter.processFilter(ThreadLocalFilter.java:35)	at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	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:191)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)	at java.lang.Thread.run(Thread.java:722)