[ https://issues.jboss.org/browse/JBRULES-3293?page=com.atlassian.jira.plug... ] Pavel Kudryashov updated JBRULES-3293: -------------------------------------- Description: If try to create ArrayList by collect with size restriction and then execute accumulate on it, environment fails. If remove ArrayList size restriction or don't use accumulate, everything works fine. Here is the example code. ================================================== rule "Large transaction" when //select last 3 transaction $lastTransactions : ArrayList(size == 3) from collect(TransactionCompleted() over window:length(3)) //calculate average sum accumulate(TransactionCompleted($amount : amount) from $lastTransactions, $averageAmount : average($amount)) //find large transactions $largeTransaction : TransactionCompleted(amount > 2 * $averageAmount) over window:length(1) then situationsReporter.report("Large transaction"); end ================================================== If rewrite the code the other way it works fine: ================================================== rule "Large transaction" when //select last 3 transaction $lastTransactions : ArrayList() from collect(TransactionCompleted() over window:length(3)) //calculate average sum accumulate(TransactionCompleted($amount : amount) from $lastTransactions, $averageAmount : average($amount)) //check if we have exactly 3 transactions eval($lastTransactions.size() == 3) //find large transactions $largeTransaction : TransactionCompleted(amount > 2 * $averageAmount) over window:length(1) then situationsReporter.report("Large transaction"); end ================================================== But if in the latter piece of code move eval($lastTransactions.size() == 3) above accumulate() it will fail the same as the first piece of code: ================================================== Exception in thread "Thread-4" org.drools.runtime.rule.ConsequenceException: rule: Transaction completed at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1093) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1022) at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1243) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:699) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at org.siemens.reaf.reasoning.cep.DroolsEngine.processEvents(DroolsEngine.java:393) at org.siemens.reaf.reasoning.cep.SensorEventsProcessor$ProcessingWorker.run(SensorEventsProcessor.java:36) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.drools.reteoo.ReteooWorkingMemory$EvaluateResultConstraints.execute(ReteooWorkingMemory.java:576) at org.drools.common.PropagationContextImpl.evaluateActionQueue(PropagationContextImpl.java:265) at org.drools.rule.SlidingLengthWindow.assertRightTuple(SlidingLengthWindow.java:114) at org.drools.rule.BehaviorManager.assertRightTuple(BehaviorManager.java:84) at org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:247) at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:451) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:379) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:204) at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:241) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:332) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:293) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905) at org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:180) at org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:174) at org.siemens.reaf.reasoning.cep.Rule_Transaction_completed_0.defaultConsequence(Rule_Transaction_completed_0.java:9) at org.siemens.reaf.reasoning.cep.Rule_Transaction_completed_0DefaultConsequenceInvoker.evaluate(Rule_Transaction completed_0DefaultConsequenceInvoker.java:36) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1083) ... 8 more ================================================== Although I may be wrong with the first piece of code, I think it shouldn't fail in the second if eval() and transaction() parts are just swapped around. Thank you. was: If try to create ArrayList by collect with size restriction and then execute accumulate on it, environment fails. If remove ArrayList size restriction or don't use accumulate, everything works fine. Here is the example code. ================================================== rule "Large transaction" when //select last 3 transaction $lastTransactions : ArrayList(size == 3) from collect(TransactionCompleted() over window:length(3)) //calculate average sum accumulate(TransactionCompleted($amount : amount) from $lastTransactions, $averageAmount : average($amount)) //find large transactions $largeTransaction : TransactionCompleted(amount > 2 * $averageAmount) over window:length(1) then situationsReporter.report("Large transaction"); end ================================================== If rewrite the code the other way it works fine: ================================================== rule "Large transaction" when //select last 3 transaction $lastTransactions : ArrayList() from collect(TransactionCompleted() over window:length(3)) //calculate average sum accumulate(TransactionCompleted($amount : amount) from $lastTransactions, $averageAmount : average($amount)) //check if we have exactly 3 transactions eval($lastTransactions.size() == 3) //find large transactions $largeTransaction : TransactionCompleted(amount > 2 * $averageAmount) over window:length(1) then situationsReporter.report("Large transaction"); end ================================================== But if in the latter piece of code move eval($lastTransactions.size() == 3) above accumulate() it will fail the same as the first piece of code: ================================================== Exception in thread "Thread-4" org.drools.runtime.rule.ConsequenceException: rule: Transaction completed at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1093) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1022) at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1243) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:699) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) at org.siemens.reaf.reasoning.cep.DroolsEngine.processEvents(DroolsEngine.java:393) at org.siemens.reaf.reasoning.cep.SensorEventsProcessor$ProcessingWorker.run(SensorEventsProcessor.java:36) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.drools.reteoo.ReteooWorkingMemory$EvaluateResultConstraints.execute(ReteooWorkingMemory.java:576) at org.drools.common.PropagationContextImpl.evaluateActionQueue(PropagationContextImpl.java:265) at org.drools.rule.SlidingLengthWindow.assertRightTuple(SlidingLengthWindow.java:114) at org.drools.rule.BehaviorManager.assertRightTuple(BehaviorManager.java:84) at org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:247) at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:451) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:379) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134) at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:204) at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:241) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:332) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:293) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905) at org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:180) at org.drools.base.DefaultKnowledgeHelper.insert(DefaultKnowledgeHelper.java:174) at org.siemens.reaf.reasoning.cep.Rule_Transaction_completed_0.defaultConsequence(Rule_Transaction_completed_0.java:9) at org.siemens.reaf.reasoning.cep.Rule_Transaction_completed_0DefaultConsequenceInvoker.evaluate(Rule_Transaction completed_0DefaultConsequenceInvoker.java:36) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1083) ... 8 more ================================================== Thank you. -- This message is automatically generated by JIRA. 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