Hi,

I noticed something really strange in my trace logging: certain moves are made multiple times, even consecutive.
How is this possible?
I am using Planner 5.5.0.Final and no custom move factories (see config below).


TRACE: [2013-01-25 14:12:28,309] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (12), score (-515hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => (P4) ).
TRACE: [2013-01-25 14:12:28,309] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Ignoring not doable move ({T= Inspect A380-TR1.I#0 [5->6] Kristof IV} => IV).
TRACE: [2013-01-25 14:12:28,310] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (14), score (-2090hard/0soft), accepted (true) for move ({T= Inspect A380-TR1.I#1 [5->6] Gerald IV} => (P9) ).
TRACE: [2013-01-25 14:12:28,310] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Ignoring not doable move ({T= Inspect A320-CZ4.I#0 [7->9] Kristof IV} => IV).
TRACE: [2013-01-25 14:12:28,310] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Ignoring not doable move ({T= Inspect A380-TR1.I#1 [5->6] Gerald IV} => IV).
TRACE: [2013-01-25 14:12:28,311] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (17), score (-230hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => Andy).
TRACE: [2013-01-25 14:12:28,312] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (18), score (-120hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#0 [5->5] Andy IV} => (P7) ).
TRACE: [2013-01-25 14:12:28,313] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (19), score (-120hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#0 [5->5] Andy IV} => (P7) ).
TRACE: [2013-01-25 14:12:28,313] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (20), score (-30hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => TL).
TRACE: [2013-01-25 14:12:28,315] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (21), score (-2180hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#0 [5->5] Andy IV} => (P1) ).
TRACE: [2013-01-25 14:12:28,316] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (22), score (-515hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => (P4) ).
TRACE: [2013-01-25 14:12:28,317] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (23), score (-515hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => (P4) ).
TRACE: [2013-01-25 14:12:28,318] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (24), score (-3180hard/0soft), accepted (true) for move ({T= Inspect A320-CZ4.I#1 [7->8] Andy IV} => (P1) ).
TRACE: [2013-01-25 14:12:28,318] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Ignoring not doable move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => IV).
TRACE: [2013-01-25 14:12:28,320] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (26), score (-120hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => (P5) ).
TRACE: [2013-01-25 14:12:28,322] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (27), score (-45hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => (P8) ).
TRACE: [2013-01-25 14:12:28,323] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (28), score (-30hard/0soft), accepted (true) for move ({T= Inspect A380-TR1.I#0 [5->6] Kristof IV} => TL).
TRACE: [2013-01-25 14:12:28,324] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (29), score (-2635hard/0soft), accepted (true) for move ({T= Inspect A320-CZ4.I#1 [7->8] Andy IV} => (P2) ).
TRACE: [2013-01-25 14:12:28,325] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (30), score (-650hard/0soft), accepted (true) for move ({T= Inspect A320-CZ4.I#0 [7->9] Kristof IV} => (P6) ).
TRACE: [2013-01-25 14:12:28,334] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Ignoring not doable move ({T= Inspect A380-TR1.I#2 [5->6] Jesse IV} => Jesse).
TRACE: [2013-01-25 14:12:28,335] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (32), score (-230hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#0 [5->5] Andy IV} => Gerald).
TRACE: [2013-01-25 14:12:28,336] main org.drools.planner.core.localsearch.decider.DefaultDecider -         Move index (33), score (-515hard/0soft), accepted (true) for move ({T= Inspect B747-AX1.I#1 [7->7] Jesse IV} => (P4) ).
 
Config:

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

    <!-- Domain model configuration -->
    <solutionClass>be.axi.planner.app.InspectionSchedule</solutionClass>
    <planningEntityClass>be.axi.planner.domain.Task</planningEntityClass>

    <!-- Score configuration -->
    <scoreDirectorFactory>
        <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>
        <scoreDrl>/inspectionRules.drl</scoreDrl>
    </scoreDirectorFactory>
   
    <constructionHeuristic>
        <constructionHeuristicType>BEST_FIT_DECREASING</constructionHeuristicType>
        <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>
    </constructionHeuristic>
   
    <!--customSolverPhase>
        <customSolverPhaseCommandClass>be.axi.planner.solution.SolutionInitializer</customSolverPhaseCommandClass>
    </customSolverPhase-->
    
    <localSearch>
        <termination>
            <terminationCompositionStyle>OR</terminationCompositionStyle>
            <maximumSecondsSpend>3600</maximumSecondsSpend>
            <scoreAttained>0hard/0soft</scoreAttained>
        </termination>
        <unionMoveSelector>
            <changeMoveSelector>
                <valueSelector>
                    <planningVariableName>type</planningVariableName>
                </valueSelector>
            </changeMoveSelector>
            <changeMoveSelector>
                <valueSelector>
                    <planningVariableName>spector</planningVariableName>
                </valueSelector>
            </changeMoveSelector>
            <changeMoveSelector>
                <valueSelector>
                    <planningVariableName>period</planningVariableName>
                </valueSelector>
            </changeMoveSelector>
        </unionMoveSelector>

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

Thanks,

Michiel
-----------------
http://www.codessentials.com - Your essential software, for free!
Follow us at http://twitter.com/#!/Codessentials