2011/3/31 Manuel Ortiz <[email protected]> > Hi Wofgang: > > Thank youvery much for your response. I was replaying to Mauricio when your > email has arrived. I hope the test case is useful. > > Thanks. Files are attached to the JIRA and JIRA is now at "critical". -W
> Best regards, > > Manuel Ortiz. > > > 2011/3/31 Wolfgang Laun <[email protected]> > >> Manuel, >> >> I have reported this (or a very similar) problem >> https://issues.jboss.org/browse/JBRULES-2887 with a small example to >> reproduce. >> >> The stack trace is not identical, so please try to reproduce this with a >> small test case; it is bound to happen with a rule (Test Negativo Alarma >> Acceso Portal Ubicacion UM) that modifies some fact that is used in an >> "accumulate" phrase, (If this pattern is different from the one I gave, I'll >> raise the issue priority to "critical".) >> >> Cheers >> Wolfgang >> >> >> 2011/3/30 Manuel Ortiz <[email protected]> >> >>> Hello all! >>> >>> I am new in Drools but day by day, test by test, I think I get a bit more >>> knowledge of how the rule engine works from user point of view. I've been >>> adding rules to an alarm system, increasing the complexity and functionality >>> in several steps. Unfortunately in the last step I found the following >>> NullPointerException inside the rule engine... >>> >>> java.lang.NullPointerException >>> at >>> org.drools.reteoo.AccumulateNode.getFirstMatch(AccumulateNode.java:967) >>> at >>> org.drools.reteoo.AccumulateNode.modifyLeftTuple(AccumulateNode.java:329) >>> at >>> org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateModifyChildLeftTuple(SingleLeftTupleSinkAdapter.java:239) >>> at >>> org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:640) >>> at >>> org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:270) >>> at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:312) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:460) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:428) >>> at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:160) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:460) >>> at >>> org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:428) >>> at org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:263) >>> at >>> org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:172) >>> at >>> org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1442) >>> at >>> org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1349) >>> at >>> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:183) >>> at >>> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:196) >>> at >>> es.simcasva.alarmas.rules.Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0.defaultConsequence(Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0.java:18) >>> at >>> es.simcasva.alarmas.rules.Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0DefaultConsequenceInvoker.evaluate(Rule_Test_Negativo_Alarma_Acceso_Portal_Ubicacion_UM_0DefaultConsequenceInvoker.java:44) >>> at >>> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:917) >>> at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:856) >>> at >>> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1071) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:785) >>> at >>> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:751) >>> at >>> org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) >>> >>> I've been trying to find the problem, and found a strange interaction >>> between three rules that makes the null pointer to appear. The alarm system >>> has many rules now and it is difficult to simplify the scenario, so I just >>> would like to know what is the funcion of AccumulateNode object in order to >>> have an idea of the NullPointerException possible cause. >>> >>> Can anyone help me? >>> >>> Thank you in advance for your time. >>> >>> Regards, >>> >>> Manuel Ortiz. >>> >>> >>> _______________________________________________ >>> rules-users mailing list >>> [email protected] >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >>> >> >> _______________________________________________ >> rules-users mailing list >> [email protected] >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users > >
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