"java.lang.NullPointerException↵  at org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_10.OrderResource1_10$1.compare(OrderResource1_10.java:267)↵ at org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_10.OrderResource1_10$1.compare(OrderResource1_10.java:263)↵ at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)↵  at java.util.TimSort.sort(TimSort.java:220)↵  at java.util.Arrays.sort(Arrays.java:1512)↵   at java.util.ArrayList.sort(ArrayList.java:1454)↵ at java.util.Collections.sort(Collections.java:175)↵  at org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_10.OrderResource1_10.sortOrdersBasedOnDateActivatedOrDateStopped(OrderResource1_10.java:263)↵   at org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_10.OrderResource1_10.doSearch(OrderResource1_10.java:252)↵  at org.openmrs.module.webservices.rest.web.resource.impl.DelegatingCrudResource.search(DelegatingCrudResource.java:183)↵  at org.openmrs.module.webservices.rest.web.v1_0.controller.MainResourceController.get(MainResourceController.java:193)↵   at sun.reflect.GeneratedMethodAccessor955.invoke(Unknown Source)↵ at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)↵ at java.lang.reflect.Method.invoke(Method.java:498)↵  at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:177)↵   at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)↵    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)↵ at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)↵  at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)↵   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)↵    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)↵ at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)↵  at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)↵   at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)↵  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.openmrs.module.web.filter.ForcePasswordChangeFilter.doFilter(ForcePasswordChangeFilter.java:60)↵   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:72)↵   at org.openmrs.web.filter.GZIPFilter.doFilterInternal(GZIPFilter.java:64)↵    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)↵   at org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)↵   at org.openmrs.module.webservices.rest.web.filter.AuthorizationFilter.doFilter(AuthorizationFilter.java:104)↵ at org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)↵   at org.springframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:82)↵  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)↵   at org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)↵   at org.openmrs.module.owa.filter.OwaFilter.doFilter(OwaFilter.java:57)↵   at org.openmrs.module.web.filter.ModuleFilterChain.doFilter(ModuleFilterChain.java:70)↵   at org.openmrs.module.web.filter.ModuleFilter.doFilter(ModuleFilter.java:54)↵ at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.openmrs.web.filter.OpenmrsFilter.doFilterInternal(OpenmrsFilter.java:108)↵ at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)↵   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:150)↵ at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)↵   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:105)↵ at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:105)↵ at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.openmrs.web.filter.StartupFilter.doFilter(StartupFilter.java:105)↵ at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)↵  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)↵   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)↵ at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)↵ at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)↵   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)↵   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)↵    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)↵ at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)↵ at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)↵ at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:409)↵   at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1044)↵   at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)↵   at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313)↵  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)↵   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)↵   at java.lang.Thread.run(Thread.java:748)↵"