Re: [rules-users] Error selecting order decrease [planner] - mvel NPE eats real exception?

Which mvel2 jar version? Provided that the mvel version is correct, it looks like the real exception gets eaten... Caused by: java.lang.NullPointerException at java.lang.String.<init>(Unknown Source) at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) If that's true, we need to open a jira. Pinging Mario on this. In any case, the exception message should be much clearer as to what's the problem is. Op 28-01-13 16:51, André Fróes schreef: 5.5.0.Final both 2013/1/28 Geoffrey De Smet <ge0ffrey.spam(a)gmail.com&gt; > 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 > > _______________________________________________ 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