[jboss-jira] [JBoss JIRA] (DROOLS-3066) NPE in Drools org.drools.core.rule.SingleAccumulate.reverse(SingleAccumulate.java:124)

[Luca Molteni (Jira)]

     [ https://issues.jboss.org/browse/DROOLS-3066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luca Molteni updated DROOLS-3066:
---------------------------------
    Story Points: 3


> NPE in Drools org.drools.core.rule.SingleAccumulate.reverse(SingleAccumulate.java:124) 
> ---------------------------------------------------------------------------------------
>
>                 Key: DROOLS-3066
>                 URL: https://issues.jboss.org/browse/DROOLS-3066
>             Project: Drools
>          Issue Type: Bug
>          Components: executable model
>    Affects Versions: 7.4.1.Final
>         Environment: Windows 7
> Oracle Java Development Kit 1.8.0_111
> Eclipse Oxygen 3a
> Optaplanner 7.4.1.Final
>            Reporter: Philip Harding
>            Assignee: Luca Molteni
>            Priority: Major
>         Attachments: NPE_Drools_MWE.zip
>
>   Original Estimate: 2 days
>  Remaining Estimate: 2 days
>
> The rule
> {code:java}
> rule "globalRequiredPredecessorAfterMe"
>     when 
>         $rpAll: Set(size>1) from accumulate (
>         	Customer(Domicile != null, $rpAfterMe: requiredPredecessorsAfterMe);
>         		collectSet($rpAfterMe)
>         	)
>     then
>         scoreHolder.addMediumConstraintMatch(kcontext, - $rpAll.size()-1);
>   end
> {code}
> gives following NPE within the attached Optaplanner model:
> {code:java}
> Exception in thread "main" java.lang.RuntimeException: java.lang.NullPointerException
> 	at org.drools.core.rule.SingleAccumulate.reverse(SingleAccumulate.java:124)
> 	at org.drools.core.phreak.PhreakAccumulateNode.removeMatch(PhreakAccumulateNode.java:796)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doRightUpdatesProcessChildren(PhreakAccumulateNode.java:517)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doRightUpdates(PhreakAccumulateNode.java:450)
> 	at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:76)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:581)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:552)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:379)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:339)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:175)
> 	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:133)
> 	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:212)
> 	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:87)
> 	at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
> 	at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
> 	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1067)
> 	at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1014)
> 	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1006)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1337)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1328)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1312)
> 	at org.optaplanner.core.impl.score.director.drools.DroolsScoreDirector.calculateScore(DroolsScoreDirector.java:117)
> 	at org.optaplanner.core.impl.score.director.AbstractScoreDirector.doAndProcessMove(AbstractScoreDirector.java:187)
> 	at org.optaplanner.core.impl.constructionheuristic.decider.ConstructionHeuristicDecider.doMove(ConstructionHeuristicDecider.java:126)
> 	at org.optaplanner.core.impl.constructionheuristic.decider.ConstructionHeuristicDecider.decideNextStep(ConstructionHeuristicDecider.java:100)
> 	at org.optaplanner.core.impl.constructionheuristic.DefaultConstructionHeuristicPhase.solve(DefaultConstructionHeuristicPhase.java:74)
> 	at org.optaplanner.core.impl.solver.AbstractSolver.runPhases(AbstractSolver.java:88)
> 	at org.optaplanner.core.impl.solver.DefaultSolver.solve(DefaultSolver.java:191)
> 	at canihazafischbroetchenplz.app.TestApp.main(TestApp.java:35)
> Caused by: java.lang.NullPointerException
> 	at org.drools.core.base.accumulators.CollectSetAccumulateFunction.reverse(CollectSetAccumulateFunction.java:118)
> 	at org.drools.core.base.accumulators.CollectSetAccumulateFunction.reverse(CollectSetAccumulateFunction.java:49)
> 	at org.drools.core.base.accumulators.JavaAccumulatorFunctionExecutor.reverse(JavaAccumulatorFunctionExecutor.java:133)
> 	at org.drools.core.rule.SingleAccumulate.reverse(SingleAccumulate.java:116)
> 	... 28 more
> {code}



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