[rules-users] Error selecting order decrease [planner]
André Fróes
arfmoraes at gmail.com
Mon Jan 28 10:51:29 EST 2013
5.5.0.Final both
2013/1/28 Geoffrey De Smet <ge0ffrey.spam at gmail.com>
> Which version of planner (drools-planner-core) and drools (drools-core,
> drools-compiler)?
> Op 28-01-13 16:40, André Fróes schreef:
>
> I'm comparing both the example and my implementation, can't see anything
> different from each other except that example uses that
> CloudBalancingGenerator. Even the drl rule remains the same, i wrote it and
> then fixed the errors until reach that point.
>
>
> 2013/1/28 André Fróes <arfmoraes at gmail.com>
>
>> this is the full drl file:
>>
>> ------------
>>
>> package com.swa.planner.domain.rule;
>>
>> import
>> org.drools.planner.core.score.buildin.hardandsoft.HardAndSoftScoreHolder;
>> import org.drools.planner.core.score.constraint.IntConstraintOccurrence;
>> import org.drools.planner.core.score.constraint.ConstraintType;
>>
>> import com.swa.planner.domain.CloudBalance;
>> import com.swa.planner.domain.CloudComputer;
>> import com.swa.planner.domain.CloudProcess;
>>
>> global HardAndSoftScoreHolder scoreHolder;
>>
>> rule "requiredCpuPowerTotal"
>> when
>> $computer : CloudComputer($cpuPower : cpuPower)
>> $requiredCpuPowerTotal : Number(intValue > $cpuPower) from accumulate(
>> CloudProcess (
>> computer == $computer,
>> $requiredCpuPower : requiredCpuPower),
>> sum($requiredCpuPower)
>> )
>> then
>> insertLogical(new IntConstraintOccurrence("requiredCpuPowerTotal",
>> ConstraintType.NEGATIVE_HARD,
>> $requiredCpuPowerTotal.intValue() - $cpuPower,
>> $computer));
>> end
>>
>> rule "requiredMemoryTotal"
>> when
>> $computer : CloudComputer($memory : memory)
>> $requiredMemoryTotal : Number(intValue > $memory) from accumulate(
>> CloudProcess (
>> computer == $computer,
>> $requiredMemory : requiredMemory),
>> sum($requiredMemory)
>> )
>> then
>> insertLogical(new IntConstraintOccurrence("requiredMemoryTotal",
>> ConstraintType.NEGATIVE_HARD,
>> $requiredMemoryTotal.intValue() - $memory,
>> $computer));
>> end
>>
>> rule "requiredNetworkBandwidth"
>> when
>> $computer : CloudComputer($networkBandwidth : networkBandwidth)
>> $requiredNetworkBandwidthTotal : Number(intValue > $networkBandwidth)
>> from accumulate(
>> CloudProcess (
>> computer == $computer,
>> $requiredNetworkBandwidth : requiredNetworkBandwidth)
>> sum($requiredNetworkBandwidth)
>> )
>> then
>> insertLogical(new IntConstraintOccurrence("requiredNetworkBandwidth",
>> ConstraintType.NEGATIVE_HARD,
>> $requiredNetworkBandwidthTotal.intValue() - $networkBandwidth,
>> $computer));
>> end
>>
>> rule "hardConstraintBroken"
>> salience -1
>> when
>> $hardTotal : Number() from accumulate(
>> IntConstraintOccurrence(constraintType == ConstraintType.NEGATIVE_HARD,
>> $weight : weight)
>> sum($weight)
>> )
>> then
>> scoreHolder.setHardConstraintsBroken($hardTotal.intValue());
>> end
>>
>>
>> // Soft constraint
>>
>> rule "computerCost"
>> when
>> $computer : CloudComputer($cost : cost)
>> exists CloudProcess(computer == $computer)
>> then
>> insertLogical(new IntConstraintOccurrence("computerCost",
>> ConstraintType.NEGATIVE_SOFT,
>> $cost,
>> $computer));
>> end
>>
>> rule "softConstraintBroken"
>> salience -1
>> when
>> $softTotal : Number() from accumulate(
>> IntConstraintOccurrence(ConstraintType == ConstraintType.NEGATIVE_SOFT,
>> $weight : weight)
>> sum($weight)
>> )
>> then
>> scoreHolder.setHardConstraintsBroken($softTotal.intValue());
>> end
>>
>>
>> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam at gmail.com>
>>
>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14)
>>>
>>> What's in the then side of Rule_requiredCpuPowerTotal ?
>>>
>>> Op 28-01-13 16:00, André Fróes schreef:
>>>
>>> Even adding that, the error still
>>>
>>> --------------
>>> 12:57:41.050 [main] INFO o.d.p.core.solver.DefaultSolver - Solving
>>> started: time spend (152), score (null), new best score (null), random seed
>>> (0).
>>> Exception in thread "main" Exception executing consequence for rule
>>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule:
>>> java.lang.NullPointerException
>>> at
>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
>>> at
>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)
>>> at
>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
>>> at
>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
>>> at
>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
>>> at
>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
>>> at
>>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177)
>>> at
>>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92)
>>> at
>>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120)
>>> at
>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136)
>>> at
>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)
>>> at
>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82)
>>> at
>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65)
>>> at
>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)
>>> at
>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)
>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:67)
>>> Caused by: java.lang.NullPointerException
>>> at java.lang.String.<init>(Unknown Source)
>>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12)
>>> at
>>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302)
>>> at
>>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
>>> at org.mvel2.MVEL.compileExpression(MVEL.java:810)
>>> at
>>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435)
>>> at
>>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238)
>>> at
>>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206)
>>> at
>>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190)
>>> at
>>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157)
>>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)
>>> at
>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
>>> at
>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
>>> at
>>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
>>> at
>>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)
>>> at
>>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38)
>>> at
>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204)
>>> at
>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176)
>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231)
>>> at
>>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
>>> at
>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245)
>>> at
>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210)
>>> at
>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205)
>>> at
>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.defaultConsequence(Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987.java:14)
>>> at
>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvokerGenerated.evaluate(Unknown
>>> Source)
>>> at
>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_0a10acbeca924206a3becab080617987DefaultConsequenceInvoker.evaluate(Unknown
>>> Source)
>>> at
>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
>>> ... 14 more
>>>
>>> --------------
>>>
>>> I added to cloudprocess computer variable:
>>> --------------
>>> package com.swa.planner.domain;
>>>
>>> import org.drools.planner.api.domain.entity.PlanningEntity;
>>> import org.drools.planner.api.domain.variable.PlanningVariable;
>>> import org.drools.planner.api.domain.variable.ValueRange;
>>> import org.drools.planner.api.domain.variable.ValueRangeType;
>>> import org.drools.planner.examples.common.domain.AbstractPersistable;
>>>
>>> @PlanningEntity(difficultyComparatorClass =
>>> CloudProcessDifficultyComparator.class)
>>> public class CloudProcess extends AbstractPersistable{
>>>
>>> private int requiredCpuPower;
>>> private int requiredMemory;
>>> private int requiredNetworkBandwidth;
>>>
>>> private CloudComputer computer;
>>>
>>> public CloudProcess(long id, int requiredCpuPower, int requiredMemory,
>>> int requiredNetworkBandwidth) {
>>> super();
>>> setId(id);
>>> this.requiredCpuPower = requiredCpuPower;
>>> this.requiredMemory = requiredMemory;
>>> this.requiredNetworkBandwidth = requiredNetworkBandwidth;
>>> }
>>> public CloudProcess() { }
>>>
>>> public int getRequiredCpuPower() {
>>> return requiredCpuPower;
>>> }
>>>
>>> public void setRequiredCpuPower(int requiredCpuPower) {
>>> this.requiredCpuPower = requiredCpuPower;
>>> }
>>>
>>> public int getRequiredMemory() {
>>> return requiredMemory;
>>> }
>>>
>>> public void setRequiredMemory(int requiredMemory) {
>>> this.requiredMemory = requiredMemory;
>>> }
>>>
>>> public int getRequiredNetworkBandwidth() {
>>> return requiredNetworkBandwidth;
>>> }
>>>
>>> public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) {
>>> this.requiredNetworkBandwidth = requiredNetworkBandwidth;
>>> }
>>>
>>> public String getLabel() {
>>> return "Process " + id;
>>> }
>>> @PlanningVariable(strengthComparatorClass =
>>> CloudComputerStrengthComparator.class)
>>> @ValueRange(type = ValueRangeType.FROM_SOLUTION_PROPERTY,
>>> solutionProperty = "computerList")
>>> public CloudComputer getComputer() {
>>> if (computer == null) { return null; }
>>> return computer;
>>> }
>>>
>>> public void setComputer(CloudComputer computer) {
>>> this.computer = computer;
>>> }
>>> public CloudProcess clone(){
>>> CloudProcess clone = new CloudProcess();
>>> clone.id = id;
>>> clone.requiredCpuPower = requiredCpuPower;
>>> clone.requiredMemory = requiredMemory;
>>> clone.requiredNetworkBandwidth = requiredNetworkBandwidth;
>>> clone.computer = computer;
>>> return clone;
>>> }
>>> public int getRequiredMultiplicand() {
>>> return requiredCpuPower * requiredMemory *
>>> requiredNetworkBandwidth;
>>> }
>>> }
>>> --------------
>>>
>>> this is what i'm doing to run the example:
>>>
>>> -------------
>>> package com.swa.planner.domain;
>>>
>>> import java.io.ByteArrayInputStream;
>>> import java.util.ArrayList;
>>> import java.util.List;
>>>
>>> import org.drools.planner.config.SolverFactory;
>>> import org.drools.planner.config.XmlSolverFactory;
>>> import org.drools.planner.core.Solver;
>>>
>>> public class CloudTest {
>>> public static void main(String[] args) {
>>> String t = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
>>> + "<solver>"
>>> + "
>>> <solutionClass>com.swa.planner.domain.CloudBalance</solutionClass>"
>>> + "
>>> <planningEntityClass>com.swa.planner.domain.CloudProcess</planningEntityClass>"
>>> + " <scoreDirectorFactory>"
>>> + " <scoreDefinitionType>HARD_AND_SOFT</scoreDefinitionType>"
>>> + "
>>> <scoreDrl>/com/swa/planner/domain/rule/cloudBalancingScoreRules.drl</scoreDrl>"
>>> + " </scoreDirectorFactory>"
>>> + " <termination>"
>>> + " <maximumSecondsSpend>120</maximumSecondsSpend>"
>>> + " </termination>"
>>> + " <constructionHeuristic>"
>>> + "
>>> <constructionHeuristicType>FIRST_FIT_DECREASING</constructionHeuristicType>"
>>> + "
>>> <constructionHeuristicPickEarlyType>FIRST_LAST_STEP_SCORE_EQUAL_OR_IMPROVING</constructionHeuristicPickEarlyType>"
>>> + " </constructionHeuristic>"
>>> + " <localSearch>"
>>> + " <acceptor>"
>>> + " <planningEntityTabuSize>7</planningEntityTabuSize>"
>>> + " </acceptor>"
>>> + " <forager>"
>>> + " <minimalAcceptedSelection>1000</minimalAcceptedSelection>"
>>> + " </forager>"
>>> + " </localSearch>"
>>> + "</solver>";
>>>
>>> byte b[] = t.getBytes();
>>> ByteArrayInputStream bt = new ByteArrayInputStream(b);
>>> SolverFactory solverFactory = new XmlSolverFactory().configure(bt);
>>> Solver solver = solverFactory.buildSolver();
>>>
>>> List<CloudComputer> computerList = new ArrayList<CloudComputer>();
>>> computerList.add(new CloudComputer(1L, "Computador 1", 3, 2, 2, 110));
>>> computerList.add(new CloudComputer(2L, "Computador 2", 12, 8, 3, 400));
>>> computerList.add(new CloudComputer(3L, "Computador 3", 6, 6, 4, 300));
>>> computerList.add(new CloudComputer(4L, "Computador 4", 18, 12, 8,
>>> 1000));
>>> computerList.add(new CloudComputer(5L, "Computador 5", 8, 4, 6, 800));
>>> computerList.add(new CloudComputer(6L, "Computador 6", 9, 7, 9, 1000));
>>>
>>> List<CloudProcess> processList = new ArrayList<CloudProcess>();
>>> processList.add(new CloudProcess(11L, 2, 2, 2));
>>> processList.add(new CloudProcess(12L, 4, 4, 2));
>>> processList.add(new CloudProcess(13L, 1, 1, 3));
>>> processList.add(new CloudProcess(14L, 7, 3, 5));
>>> processList.add(new CloudProcess(15L, 5, 8, 3));
>>> processList.add(new CloudProcess(16L, 9, 2, 2));
>>> processList.add(new CloudProcess(17L, 6, 5, 6));
>>>
>>> CloudBalance cloudBalance = new CloudBalance();
>>> cloudBalance.setId(0L);
>>> cloudBalance.setComputerList(computerList);
>>> cloudBalance.setProcessList(processList);
>>>
>>> // Solve the problem
>>> solver.setPlanningProblem(cloudBalance);
>>> solver.solve();
>>> CloudBalance solvedCloudBalance = (CloudBalance)
>>> solver.getBestSolution();
>>>
>>> // Display the result
>>> System.out.println("\nSolved cloudBalance with 5 computers and 6
>>> processes:\n"
>>> + toDisplayString(solvedCloudBalance));
>>> }
>>>
>>> public static String toDisplayString(CloudBalance cloudBalance) {
>>> StringBuilder displayString = new StringBuilder();
>>> for (CloudProcess process : cloudBalance.getProcessList()) {
>>> CloudComputer computer = process.getComputer();
>>> displayString.append(" ").append(process.getLabel())
>>> .append(" -> ")
>>> .append(computer == null ? null : computer.getLabel())
>>> .append("\n");
>>> }
>>> return displayString.toString();
>>> }
>>> }
>>>
>>> -------------
>>>
>>>
>>> 2013/1/28 Geoffrey De Smet <ge0ffrey.spam at gmail.com>
>>>
>>>> The value of a variable of an entity starts out as null during
>>>> construction heuristics, even if it's not nullable.
>>>>
>>>> The usual trick is to add null safe getters:
>>>>
>>>> public class BedDesignation {
>>>>
>>>> // bed is planning variable
>>>> ...
>>>> public Departement getDepartment() {
>>>> if (bed == null) { return null;}
>>>> return bed.getRoom().getDepartement()
>>>> }
>>>> }
>>>>
>>>>
>>>> Op 28-01-13 15:13, André Fróes schreef:
>>>>
>>>> I've implemented it to see how it would work, now I got another error:
>>>>
>>>> ---------------
>>>>
>>>> 12:10:41.357 [main] INFO o.d.p.core.solver.DefaultSolver - Solving
>>>> started: time spend (302), score (null), new best score (null), random seed
>>>> (0).
>>>> Exception in thread "main" Exception executing consequence for rule
>>>> "requiredCpuPowerTotal" in com.swa.planner.domain.rule:
>>>> java.lang.NullPointerException
>>>> at
>>>> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
>>>> at
>>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1297)
>>>> at
>>>> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1221)
>>>> at
>>>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1456)
>>>> at
>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
>>>> at
>>>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
>>>> at
>>>> org.drools.planner.core.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:177)
>>>> at
>>>> org.drools.planner.core.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:92)
>>>> at
>>>> org.drools.planner.core.phase.AbstractSolverPhaseScope.calculateScore(AbstractSolverPhaseScope.java:120)
>>>> at
>>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.processMove(DefaultGreedyDecider.java:136)
>>>> at
>>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)
>>>> at
>>>> org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:82)
>>>> at
>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:65)
>>>> at
>>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)
>>>> at
>>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)
>>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:65)
>>>> Caused by: java.lang.NullPointerException
>>>> at java.lang.String.<init>(Unknown Source)
>>>> at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12)
>>>> at
>>>> org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302)
>>>> at
>>>> org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62)
>>>> at org.mvel2.MVEL.compileExpression(MVEL.java:810)
>>>> at
>>>> org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:435)
>>>> at
>>>> org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238)
>>>> at
>>>> org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:206)
>>>> at
>>>> org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:190)
>>>> at
>>>> org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:157)
>>>> at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137)
>>>> at
>>>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497)
>>>> at
>>>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382)
>>>> at
>>>> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235)
>>>> at
>>>> org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240)
>>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:350)
>>>> at
>>>> org.drools.common.SimpleBeliefSystem.insert(SimpleBeliefSystem.java:38)
>>>> at
>>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:204)
>>>> at
>>>> org.drools.common.TruthMaintenanceSystem.addLogicalDependency(TruthMaintenanceSystem.java:176)
>>>> at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:231)
>>>> at
>>>> org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:903)
>>>> at
>>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:245)
>>>> at
>>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:210)
>>>> at
>>>> org.drools.base.DefaultKnowledgeHelper.insertLogical(DefaultKnowledgeHelper.java:205)
>>>> at
>>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.defaultConsequence(Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bd.java:14)
>>>> at
>>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvokerGenerated.evaluate(Unknown
>>>> Source)
>>>> at
>>>> com.swa.planner.domain.rule.Rule_requiredCpuPowerTotal_d2d9e4332c804bacac7861ac867eb4bdDefaultConsequenceInvoker.evaluate(Unknown
>>>> Source)
>>>> at
>>>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
>>>> ... 14 more
>>>>
>>>> -----------------
>>>>
>>>> this one i have no clue
>>>>
>>>>
>>>> 2013/1/28 André Fróes <arfmoraes at gmail.com>
>>>>
>>>>> Hello there, i'm getting this error:
>>>>>
>>>>> -------------------
>>>>> 11:26:50.394 [main] INFO o.d.p.core.solver.DefaultSolver - Solving
>>>>> started: time spend (187), score (null), new best score (null), random seed
>>>>> (0).
>>>>> Exception in thread "main" java.lang.IllegalStateException: The
>>>>> selectionOrder (DECREASING_DIFFICULTY) can not be used on a PlanningEntity
>>>>> (com.swa.planner.domain.CloudProcess) that has no support for difficulty
>>>>> sorting. Check the @PlanningEntity annotation.
>>>>> at
>>>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53)
>>>>> at
>>>>> org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45)
>>>>> at
>>>>> org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41)
>>>>> at
>>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111)
>>>>> at
>>>>> org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57)
>>>>> at
>>>>> org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)
>>>>> at
>>>>> org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)
>>>>> at com.swa.planner.domain.CloudTest.main(CloudTest.java:51)
>>>>> -------------------------
>>>>>
>>>>> I know why it is happening though (at least i think so), but will I
>>>>> have to implement the comparator to every planner I do or is there any
>>>>> other way to make it work?
>>>>>
>>>>> I'm reproducing the example from the guide, when it passes the
>>>>> drools rules it gives that message. I didn't implement
>>>>> CloudComputerStrengthComparator neither CloudProcessDifficultyComparator,
>>>>> will I have to implement those so this example works?
>>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>>
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>>>>
>>>>
>>>
>>>
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>>>
>>>
>>>
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>>>
>>>
>>
>
>
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