Re: [rules-users] Best Solution found but latest solution does not work

Hi ge0ffrey, I understand. I forgot mentioning I am using OptaPlanner 6.0.1 Final. Your last email proved useful, I encountered some errors which I tried fixing, finally coming to this error: Exception in thread "main" java.lang.IllegalStateException: HashCode violation: the hashCode of tabu (TimetableSlot@15897e8d) probably changed since it was inserted in the tabu Map or Set. at org.optaplanner.core.impl.localsearch.decider.acceptor.tabu.AbstractTabuAcceptor.adjustTabuList(AbstractTabuAcceptor.java:108) at org.optaplanner.core.impl.localsearch.decider.acceptor.tabu.AbstractTabuAcceptor.stepEnded(AbstractTabuAcceptor.java:98) at org.optaplanner.core.impl.localsearch.decider.LocalSearchDecider.stepEnded(LocalSearchDecider.java:159) at org.optaplanner.core.impl.localsearch.DefaultLocalSearchSolverPhase.stepEnded(DefaultLocalSearchSolverPhase.java:127) at org.optaplanner.core.impl.localsearch.DefaultLocalSearchSolverPhase.solve(DefaultLocalSearchSolverPhase.java:83) at org.optaplanner.core.impl.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:155) at Main.main(Main.java:29) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120) I have run tests to ensure my Timetable (Solution), TimetableSlot (Planning Entity), and Lecturer (Planning Variable) all have working clone(), equals(), and hashCode(). Clone: I always do a deep clone, so Timetable's TimetableSlots and TimetableSlot's Lecturer will be re-instantiated. Same for the other classes. Equals: I always do deep Equals, so even if all objects and sub-objects are different it will equal true if all the base objects are equal. hashCode: I ensured that a cloned object using my cloned methods will output the SAME hashCode. My @PlanningEntityCollectionProperty returns non-cloned (so same instances) collection of TimetableSlots. Hopefully this description of my code can help you spot what I'm doing wrong. Thank you for your responses so far! Karan -- View this message in context: http://drools.46999.n3.nabble.com/Best-Solution-found-but-latest-solution... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users