javax.servlet.ServletException: javax.servlet.ServletException: javax.el.ELException: java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:285)
	at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:111)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669)
	at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1526)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)
	at com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:25)
	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)
	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)
	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)
Caused by: javax.servlet.ServletException: javax.el.ELException: java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:944)
	at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:879)
	at org.apache.jsp.WEB_002dINF.jsp.crucible.review.monolithic.review_jsp._jspService(review_jsp.java:154)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
Caused by: javax.el.ELException: java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at javax.el.BeanELResolver.getValue(BeanELResolver.java:310)
	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:188)
	at com.sun.el.parser.AstValue.getValue(AstValue.java:120)
	at com.sun.el.parser.AstValue.getValue(AstValue.java:167)
	at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)
	at org.apache.jasper.runtime.PageContextImpl.evaluateExpression(PageContextImpl.java:1009)
	at org.apache.jsp.tag.web.review.reviewPage_tag.doTag(reviewPage_tag.java:578)
	at org.apache.jsp.WEB_002dINF.jsp.crucible.review.monolithic.review_jsp._jspx_meth_rev_reviewPage_0(review_jsp.java:172)
	at org.apache.jsp.WEB_002dINF.jsp.crucible.review.monolithic.review_jsp._jspService(review_jsp.java:147)
	... 191 more
Caused by: java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at java.util.TimSort.mergeHi(TimSort.java:868)
	at java.util.TimSort.mergeAt(TimSort.java:485)
	at java.util.TimSort.mergeForceCollapse(TimSort.java:426)
	at java.util.TimSort.sort(TimSort.java:223)
	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.cenqua.crucible.view.FRXNavList.buildNavList(FRXNavList.java:185)
	at com.cenqua.crucible.view.FRXNavList.<init>(FRXNavList.java:176)
	at com.atlassian.crucible.actions.ReviewBaseAction.getFrxNavList(ReviewBaseAction.java:342)
	at com.atlassian.crucible.actions.ReviewBaseAction.getSortedFrxs(ReviewBaseAction.java:335)
	at com.atlassian.crucible.actions.ReviewBaseAction.getEmptyFRXs(ReviewBaseAction.java:319)
	at sun.reflect.GeneratedMethodAccessor1167.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at javax.el.BeanELResolver.getValue(BeanELResolver.java:305)
	... 199 more