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  1. JBRULES
  2. JBRULES-2735

ClassCastException for casting DefaultFactHandle to EventFactHandle when using Sliding Windows

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      Using the following rules file:

      package net.wlauer.DroolsEngine

      import net.wlauer.DroolsEngine.Event
      import java.util.ArrayList

      declare Event
      @role(event)
      @expires(30s)
      end

      rule TestWindow
      when
      $up : Event (type == "linkup", $inf : extra)
      $window : ArrayList () from collect (
      Event (extra == $inf) over window:length(2))
      $down : Event (type == "linkdown", this before $up) from $window
      then
      channels["up"].send($up);
      end

      Insert into a stateful session two Event objects with the same extra value, one for type "linkdown" followed by one for "linkup".

      Show
      Using the following rules file: package net.wlauer.DroolsEngine import net.wlauer.DroolsEngine.Event import java.util.ArrayList declare Event @role(event) @expires(30s) end rule TestWindow when $up : Event (type == "linkup", $inf : extra) $window : ArrayList () from collect ( Event (extra == $inf) over window:length(2)) $down : Event (type == "linkdown", this before $up) from $window then channels ["up"] .send($up); end Insert into a stateful session two Event objects with the same extra value, one for type "linkdown" followed by one for "linkup".

    Description

      When playing with a simple sliding window test using a single type of fact with @role(event), the following ClassCastException is generated:
      Exception in thread "main" java.lang.ClassCastException: org.drools.common.DefaultFactHandle cannot be cast to org.drools.common.EventFactHandle
      at org.drools.base.evaluators.BeforeEvaluatorDefinition$BeforeEvaluator.evaluateCachedLeft(BeforeEvaluatorDefinition.java:333)
      at org.drools.rule.VariableRestriction.isAllowedCachedLeft(VariableRestriction.java:110)
      at org.drools.rule.VariableConstraint.isAllowedCachedLeft(VariableConstraint.java:115)
      at org.drools.common.SingleBetaConstraints.isAllowedCachedLeft(SingleBetaConstraints.java:142)
      at org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:274)
      at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:138)
      at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:189)
      at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:64)
      at org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:662)
      at org.drools.reteoo.AccumulateNode.assertLeftTuple(AccumulateNode.java:181)
      at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:189)
      at org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(SingleLeftTupleSinkAdapter.java:138)
      at org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:148)
      at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
      at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:145)
      at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:450)
      at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:368)
      at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:190)
      at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:145)
      at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1174)
      at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1123)
      at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:917)
      at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:251)
      at net.wlauer.DroolsEngine.NonSpringRulesEngine.main(NonSpringRulesEngine.java:71)

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          is related to

          Bug - A problem that impairs or prevents the functions of the product. JBRULES-2423 "from" does not work correctly with events in STREAM mode

          • Critical - To be worked on immediately following BLOCKER issues.
          • Resolved

          Quality Risk - A potential bug. JBRULES-2685 Performance degradation from 5.0.1 to 5.1.0

          • Minor - To be worked after urgent, high, and medium priorities are resolved. This term is chosen when the severity of the issue is low, or the complexity or effort to correct it may be higher, relatively speaking. For low priority issues, known workarounds exist or are not needed due to the trivial effort needed to address the issue.
          • Resolved

          Activity

            People

              etirelli@redhat.com Edson Tirelli
              will_lauer Will Lauer (Inactive)
              Archiver:
              rhn-support-ceverson Clark Everson

              Dates

                Created:
                Updated:
                Archived:

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