java.lang.IllegalArgumentException: Comparison method violates its general contract!<br/>	at java.util.TimSort.mergeLo(TimSort.java:777)<br/>	at java.util.TimSort.mergeAt(TimSort.java:514)<br/>	at java.util.TimSort.mergeCollapse(TimSort.java:441)<br/>	at java.util.TimSort.sort(TimSort.java:245)<br/>	at java.util.Arrays.sort(Arrays.java:1512)<br/>	at java.util.ArrayList.sort(ArrayList.java:1462)<br/>	at java.util.Collections.sort(Collections.java:175)<br/>	at com.pogoda_ml.controller.ResortController.processResortMonthSeaTempPage(ResortController.java:483)<br/>	at com.pogoda_ml.servlet.ControllerServlet.doGet(ControllerServlet.java:255)<br/>	at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)<br/>	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)<br/>	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)<br/>	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br/>	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)<br/>	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)<br/>	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)<br/>	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)<br/>	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)<br/>	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)<br/>	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)<br/>	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)<br/>	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)<br/>	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)<br/>	at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:403)<br/>	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)<br/>	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:796)<br/>	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1368)<br/>	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)<br/>	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)<br/>	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)<br/>	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)<br/>	at java.lang.Thread.run(Thread.java:748)<br/>