[jboss-jira] [JBoss JIRA] (DROOLS-349) Accumulate.accumulate(Accumulate.java:182) NullPointerException
Geoffrey De Smet (JIRA)
jira-events at lists.jboss.org
Fri Nov 22 07:20:06 EST 2013
[ https://issues.jboss.org/browse/DROOLS-349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926047#comment-12926047 ]
Geoffrey De Smet commented on DROOLS-349:
-----------------------------------------
Presuming it's the exact same stacktrace and that drools 6.0.0.Final is in your classpath (instead of 6.0.0.CR1), then this error is a genuine bug. Mario usually handles these.
[~nicksnels] If you can attach a reproducer, that will greatly speed up the time to fix this and seriously increase it's chance of being fixed in 6.0.1.Final
> Accumulate.accumulate(Accumulate.java:182) NullPointerException
> ---------------------------------------------------------------
>
> Key: DROOLS-349
> URL: https://issues.jboss.org/browse/DROOLS-349
> Project: Drools
> Issue Type: Bug
> Security Level: Public(Everyone can see)
> Affects Versions: 6.0.0.CR1
> Environment: Windows 7 64 bit, Optaplanner 6.0.0.CR1, Java 1.7.0_17-b02
> Reporter: Nick Snels
> Assignee: Mario Fusco
>
> I reported my issue with a Drools rule in Optaplanner on the Drools user forum (http://drools.46999.n3.nabble.com/Optaplanner-rules-NullPointerException-td4026875.html). I was adviced to create a JIRA ticket.
> =============
> I am trying to accomplish the following, a part time employee (eg 50%) needs to do only half the shifts a full time employee needs to do. I have created a rule, that
> 1. count number of shifts of certain shiftType
> 2. count number of shifts of a certain shiftType per employee
> 3. count the total number of "arbeidsbreuken" per employee and within a certain shiftType
> 4. do something with these numbers so that an part time employee only gets half the shifts assigned that a full time employee gets
> The complete rule is:
> {code}
> rule "arbeidsbreuk"
> when
> //System.out.println("arbeidsbreuk, Drools!");
> ShiftAssignment($employee : employee, $shiftType : shiftType)
> //count aantal shifts
> $assignmentTotal : Number() from accumulate(
> $assignment : ShiftAssignment(shiftType == $shiftType),
> count($assignment)
> )
>
> //count aantal shifts per medewerker
> $assignmentTotalEmployee : Number() from accumulate(
> $assignmentEmployee : ShiftAssignment(employee == $employee, shiftType == $shiftType),
> count($assignmentEmployee)
> )
>
> //count arbeidsbreuken van alle medewerkers
> $arbeidsbreukTotal : Number() from accumulate(
> //Employee($breuk : arbeidsbreuk),
> ShiftAssignment(employee == $employee, shiftType == $shiftType),
> sum($employee.getArbeidsbreuk())
> )
> $assignmentTotalEmployee.intValue())
> then
> System.out.println("Arbeidsbreuk drools: " + $employee.getArbeidsbreuk() + " - " + $assignmentTotal.intValue() + " - " + $assignmentTotalEmployee.intValue() + " - " + $arbeidsbreukTotal);
> scoreHolder.addSoftConstraintMatch(kcontext, -(Math.abs(($employee.getArbeidsbreuk() * $assignmentTotal.intValue()) - $assignmentTotalEmployee.intValue()) * (Math.abs(($employee.getArbeidsbreuk() * $assignmentTotal.intValue()) - $assignmentTotalEmployee.intValue()))) );
> end
> {code}
> I get the following error:
> {code}
> Exception in thread "main" org.drools.core.RuntimeDroolsException: java.lang.NullPointerException
> at org.drools.core.rule.Accumulate.accumulate(Accumulate.java:182)
> at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:756)
> at org.drools.core.phreak.PhreakAccumulateNode.doLeftInserts(PhreakAccumulateNode.java:164)
> at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:81)
> at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:524)
> at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:494)
> at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:277)
> at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
> at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
> at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:205)
> at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:65)
> at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:936)
> at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1183)
> at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:935)
> at org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:909)
> at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:233)
> at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:98)
> at org.optaplanner.core.impl.solver.scope.DefaultSolverScope.calculateScore(DefaultSolverScope.java:101)
> at org.optaplanner.core.impl.bestsolution.BestSolutionRecaller.solvingStarted(BestSolutionRecaller.java:58)
> at org.optaplanner.core.impl.solver.DefaultSolver.solvingStarted(DefaultSolver.java:177)
> at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:154)
> at be.ocmwturnhout.permanenties.Main.main(Main.java:495)
> Caused by: java.lang.NullPointerException
> at be.ocmwturnhout.permanenties.solver.Rule_arbeidsbreuk654888368.accumulateExpression2(Rule_arbeidsbreuk654888368.java:23)
> at be.ocmwturnhout.permanenties.solver.Rule_arbeidsbreuk654888368AccumulateExpression2Invoker.evaluate(Rule_arbeidsbreuk654888368AccumulateExpression2Invoker.java:25)
> at org.drools.core.base.accumulators.JavaAccumulatorFunctionExecutor.accumulate(JavaAccumulatorFunctionExecutor.java:107)
> at org.drools.core.rule.Accumulate.accumulate(Accumulate.java:173)
> ... 21 more
> {code}
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