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  1. Drools
  2. DROOLS-6700

NPE in groupBy with executable model and two sessions in parallel

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major Major
    • None
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    • core engine
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    • 2021 Week 43-45 (from Oct 25)
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      Clone this: https://github.com/triceo/optaplanner-class-cast-issue/tree/reproducer2
      Then "cd vng-schedule && ./gradlew build run"

      The loop will run until the problem is successfully reproduced. Usually it doesn't take more than 10 iterations.

      Show
      Clone this: https://github.com/triceo/optaplanner-class-cast-issue/tree/reproducer2 Then "cd vng-schedule && ./gradlew build run" The loop will run until the problem is successfully reproduced. Usually it doesn't take more than 10 iterations.
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      Caused by: java.lang.NullPointerException: Cannot invoke "org.drools.core.rule.Declaration.getValue(org.drools.core.common.ReteEvaluator, Object)" because "declaration" is null
        at org.optaplanner.core.impl.score.stream.drools.common.AbstractAccumulator.extractValue(AbstractAccumulator.java:42)
        at org.optaplanner.core.impl.score.stream.drools.common.BiAccumulator.accumulate(BiAccumulator.java:56)
        at org.drools.core.rule.SingleAccumulate.accumulate(SingleAccumulate.java:96)
        at org.drools.core.phreak.PhreakAccumulateNode.addMatch(PhreakAccumulateNode.java:736)
        at org.drools.core.phreak.PhreakAccumulateNode.doRightInserts(PhreakAccumulateNode.java:253)
        at org.drools.core.phreak.PhreakAccumulateNode.doNode(PhreakAccumulateNode.java:99)
        at org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:591)
        at org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:558)
        at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:385)
        at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:345)
        at org.drools.core.phreak.RuleNetworkEvaluator.evalStackEntry(RuleNetworkEvaluator.java:243)
        at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:186)
        at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:139)
        at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:235)
        at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:91)
        at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:33)
        at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
        at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:789)
        at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:736)
        at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:728)
        at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1344)
        at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1335)
        at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1327)
        at org.optaplanner.core.impl.score.director.stream.DroolsConstraintStreamScoreDirector.calculateScore(DroolsConstraintStreamScoreDirector.java:90)
        at org.optaplanner.core.impl.score.director.AbstractScoreDirector.doAndProcessMove(AbstractScoreDirector.java:220)
        at org.optaplanner.core.impl.heuristic.thread.MoveThreadRunner.run(MoveThreadRunner.java:147)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:833)

              mfusco@redhat.com Mario Fusco
              lpetrovi@redhat.com Lukáš Petrovický (Inactive)
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                Created:
                Updated:
                Resolved: