Hi Geoffrey,

Thanks for your advice.

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

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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