Re: [rules-users] Error selecting order decrease [planner]

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(a)gmail.com&gt; > 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(a)gmail.com&gt; > >> 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(a)gmail.com&gt; >> >>> 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(a)gmail.com&gt; >>> >>>> 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? >>>> >>> >>> >>> >>> _______________________________________________ >>> rules-users mailing listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> >> _______________________________________________ >> rules-users mailing listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > _______________________________________________ rules-users mailing listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users