Problem fixed.

Regards,

Michiel

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From: Michiel Vermandel <mvermand@yahoo.com>
To: Rules Users List <rules-users@lists.jboss.org>
Sent: Wednesday, January 9, 2013 10:32 AM
Subject: Re: [rules-users] Fw: proble with localSearch

There is a construction heuristic that should have already filled in that planning entity.

The two other planning variables are filled for each planning entity.

I have put a printline in the setter of the troublesome planning variable:

    @PlanningVariable(strengthComparatorClass = TasktypeStrengthComparator.class, nullable = false)
    @ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY, solutionProperty = "tasktypes")
    public TaskType getType() {
        return type;
    }

    public void setType(TaskType type) {
        System.out.println("Type set to " + type);
        this.type = type;
    }

And I get the following outprint:

Type set to TL
Type set to null
Type set to TL
Type set to TL
Type set to null
Type set to TL
Type set to null
Type set to TL
Type set to null
Type set to TL
Type set to null
Type set to TL
Type set to TL
Type set to null
Type set to TL
...
Type set to null
Type set to TL
Type set to null
Type set to TL

Note that I also tried to set the annotation property nullable to false.
This seems to have no effect.

Thanks,
Michiel

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From: Geoffrey De Smet <ge0ffrey.spam@gmail.com>
To: Rules Users List <rules-users@lists.jboss.org>
Sent: Wednesday, January 9, 2013 9:30 AM
Subject: Re: [rules-users] Fw: proble with localSearch

Op 09-01-13 08:21, Michiel Vermandel schreef:

Hi Geoffrey,

Thanks for your advice.

Indeed one of the planning variables is consistently null over all planning entities.

And there was a construction heuristic that should have already filled in that planning entity?
Enable DEBUG logging, so you can see in the construction heuristic log if it does steps which change that variable from null to a non-null value.

If you have 2 <constructionHeuristics> configurations before the <localSearch> configuration (which I don't see how you could with the 5.5 CH behavior):
I just fixed a bug/feature for 6.0 earlier this week to support that.

Should drools planner take care of this or should I impose an extra rule to exclude these selections?

Once again I seem to struggle with nulls being passed in as planning variable...

Thanks,

Michiel

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From: Geoffrey De Smet <ge0ffrey.spam@gmail.com>
To: Michiel Vermandel <mvermand@yahoo.com>; Rules Users List <rules-users@lists.jboss.org>
Sent: Tuesday, January 8, 2013 4:27 PM
Subject: Re: proble with localSearch
Op 08-01-13 15:24, Michiel Vermandel schreef:

Hi,

I'm trying to implement a basic local search (really new to it).

When I run my project I now get:

Exception in thread "main" java.lang.IllegalStateException: Phase localSearch started with an uninitialized Solution. First initialize the Solution. For example, run a phase constructionHeuristic first.
at org.drools.planner.core.localsearch.DefaultLocalSearchSolverPhase.phaseStarted(DefaultLocalSearchSolverPhase.java:120)

You have a construction heuristic configured, so all @PlanningVariable's should be different from null after that phase is ended.
So when the local search phase starts, that check should be ok and not throw that exception.

Comment out local search, write the solution to disk an verify that all planning variables are now not null.
Or debug where that exception is throw and inspect phaseScope.getSolverScope().getScoreDirector().getWorkingSolution().
This is my config:

<?xml version="1.0" encoding="UTF-8"?>
<solver>
    <environmentMode>DEBUG</environmentMode>

    
    <solutionClass>be.axi.planner.app.InspectionSchedule</solutionClass>
    <planningEntityClass>be.axi.planner.domain.Task</planningEntityClass>

    
    <scoreDirectorFactory>
        <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>
        <scoreDrl>/inspectionRules.drl</scoreDrl>
    </scoreDirectorFactory>

    <constructionHeuristic>
        <constructionHeuristicType>BEST_FIT_DECREASING</constructionHeuristicType>
        
    </constructionHeuristic>

    <localSearch>
        <termination>
            <terminationCompositionStyle>OR</terminationCompositionStyle>
            <maximumSecondsSpend>3600</maximumSecondsSpend>
            <scoreAttained>0hard/0soft</scoreAttained>
        </termination>
        <unionMoveSelector>
            <changeMoveSelector>
                <valueSelector>
                    <planningVariableName>period</planningVariableName>
                </valueSelector>
            </changeMoveSelector>
            <changeMoveSelector>
                <valueSelector>
                    <planningVariableName>spector</planningVariableName>
                </valueSelector>
            </changeMoveSelector>
            <changeMoveSelector>
                <valueSelector>
                    <planningVariableName>type</planningVariableName>
                </valueSelector>
            </changeMoveSelector>
            <swapMoveSelector>
            </swapMoveSelector>
        </unionMoveSelector>

        <acceptor>
            <planningEntityTabuSize>7</planningEntityTabuSize>
        </acceptor>
        <forager>
            <minimalAcceptedSelection>1000</minimalAcceptedSelection>
        </forager>
    </localSearch>

</solver>

Any thoughts on what I'm doing wrong?

Thanks

Michiel

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