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

[Geoffrey De Smet]

What happens if you don't use custom cloning?
(See section about cloning in docs for more info.)

On 04-03-14 13:18, moltenice wrote:
> 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 at 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-does-not-work-tp4028442p4028482.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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