[jboss-jira] [JBoss JIRA] (JBRULES-3590) ClassCastException in RuleTerminalNode.retractLeftTuple()

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-3590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12709149#comment-12709149 ] 

RH Bugzilla Integration commented on JBRULES-3590:
--------------------------------------------------

Alessandro Lazarotti <alazarot at redhat.com> made a private comment on [bug 845000|https://bugzilla.redhat.com/show_bug.cgi?id=845000]
                
> ClassCastException in RuleTerminalNode.retractLeftTuple()
> ---------------------------------------------------------
>
>                 Key: JBRULES-3590
>                 URL: https://issues.jboss.org/browse/JBRULES-3590
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core  (expert)
>    Affects Versions: 5.4.0.Final
>            Reporter: Toshiya Kobayashi
>            Assignee: Mario Fusco
>             Fix For: 5.4.1.Final, 5.5.0.Beta1
>
>
> ruleflow-group + lock-on-activate may cause a ClassCastException.
> {noformat}
> import org.drools.Person;
> import org.drools.Cheese;
> rule R1
> ruleflow-group "group1"
> lock-on-active true
> when
>    $p : Person()
> then
>    $p.setName("John");
>    update ($p);
> end
> rule R2
> ruleflow-group "group1"
> lock-on-active true
> when
>    $p : Person( name == null )
>    forall ( Cheese ( type == "cheddar" ))
> then
> end
> {noformat}
> {noformat}
> Exception executing consequence for rule "R1" in defaultpkg: java.lang.ClassCastException: java.lang.Boolean cannot be cast to org.drools.spi.Activation
> 	at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
> 	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1287)
> 	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1212)
> 	at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1446)
> 	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
> 	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
> 	at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:230)
> ...
> Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to org.drools.spi.Activation
> 	at org.drools.reteoo.RuleTerminalNode.retractLeftTuple(RuleTerminalNode.java:309)
> 	at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:224)
> 	at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:98)
> 	at org.drools.reteoo.NotNode.retractLeftTuple(NotNode.java:216)
> 	at org.drools.reteoo.LeftTupleSource.doModifyLeftTuple(LeftTupleSource.java:286)
> 	at org.drools.reteoo.AbstractTerminalNode.modifyLeftTuple(AbstractTerminalNode.java:104)
> 	at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateModifyLeftTuple(SingleLeftTupleSinkAdapter.java:205)
> 	at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateModifyObject(SingleLeftTupleSinkAdapter.java:235)
> 	at org.drools.reteoo.LeftInputAdapterNode.modifyObject(LeftInputAdapterNode.java:170)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:507)
> 	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:432)
> 	at org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:314)
> 	at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:265)
> 	at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:470)
> 	at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:370)
> 	at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:319)
> 	at defaultpkg.Rule_R1_71208af44b274026888141d4be342303.defaultConsequence(Rule_R1_71208af44b274026888141d4be342303.java:8)
> 	at defaultpkg.Rule_R1_71208af44b274026888141d4be342303DefaultConsequenceInvokerGenerated.evaluate(Unknown Source)
> 	at defaultpkg.Rule_R1_71208af44b274026888141d4be342303DefaultConsequenceInvoker.evaluate(Unknown Source)
> 	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1277)
> 	... 35 more
> {noformat}
> It's probably due to the change introduced by the commit c6a3beea974234df599c4b3b80749f8ff15d3149 which sets a Boolean to the tuple.
> {noformat}
>     public boolean createActivation(final LeftTuple tuple,
>                                     final PropagationContext context,
>                                     final InternalWorkingMemory workingMemory,
>                                     final RuleTerminalNode rtn,
>                                     final boolean reuseActivation ) {
> ...
>             InternalAgendaGroup agendaGroup = (InternalAgendaGroup) getAgendaGroup( rule.getAgendaGroup() );
>             if ( rule.getRuleFlowGroup() == null ) {
>                 // No RuleFlowNode so add it directly to the Agenda
>                 // do not add the activation if the rule is "lock-on-active" and the
>                 // AgendaGroup is active
>                 if ( rule.isLockOnActive() && agendaGroup.isActive() && agendaGroup.getAutoFocusActivator() != context) {
>                         if ( tuple.getObject() == null ) {
>                                 tuple.setObject( Boolean.TRUE ); // this is so we can do a check with a bit more intent than a null check on modify
>                         }
>                     return false;
>                 }
>             } else {
>                 // There is a RuleFlowNode so add it there, instead of the Agenda
>                 InternalRuleFlowGroup rfg = (InternalRuleFlowGroup) getRuleFlowGroup( rule.getRuleFlowGroup() );
>                 // do not add the activation if the rule is "lock-on-active" and the
>                 // RuleFlowGroup is active
>                 if ( rule.isLockOnActive() && rfg.isActive() && agendaGroup.getAutoFocusActivator() != context) {
>                         if ( tuple.getObject() == null ) {
>                                 tuple.setObject( Boolean.TRUE ); // this is so we can do a check with a bit more intent than a null check on modify
>                         }
>                     return false;
>                 }
>             }
> {noformat}

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