[rules-users] 5.3.0 NoClassDefFound due to nested property access

[Wolfgang Laun]

Is this already known and fixed in 5.4.0? The problem occurs when you
have, e.g.,

   Fact( foo.bar == "baz" )

Stack dump:

Exception in thread "main" java.lang.NoClassDefFoundError: monitor/Monitor
	at ASMAccessorImpl_114212541328697624590.getValue(Unknown Source)
	at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:73)
	at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:106)
	at org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:42)
	at org.mvel2.MVEL.executeExpression(MVEL.java:954)
	at org.drools.base.extractors.MVELClassFieldReader.getValue(MVELClassFieldReader.java:100)
	at org.drools.base.extractors.BaseObjectClassFieldReader.isNullValue(BaseObjectClassFieldReader.java:179)
	at org.drools.rule.VariableRestriction$ObjectVariableContextEntry.updateFromFactHandle(VariableRestriction.java:338)
	at org.drools.common.SingleBetaConstraints.updateFromFactHandle(SingleBetaConstraints.java:118)
	at org.drools.reteoo.NotNode.modifyRightTuple(NotNode.java:339)
	at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:431)
	at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:468)
	at org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:436)
	at org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:288)
	at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:271)
	at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:459)
	at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:363)
	at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:298)
	at monitor.Rule_stop_monitoring.defaultConsequence(Rule_stop_monitoring.java:8)
	at monitor.Rule_stop_monitoringDefaultConsequenceInvoker.evaluate(Unknown
Source)
	at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1091)
	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1029)
	at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1251)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:708)
	at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:672)
	at org.drools.common.Scheduler$ActivationTimerJob.execute(Scheduler.java:90)
	at org.drools.time.impl.DefaultTimerJobInstance.call(DefaultTimerJobInstance.java:46)
	at org.drools.time.impl.DefaultTimerJobInstance.call(DefaultTimerJobInstance.java:13)
	at org.drools.time.impl.PseudoClockScheduler.runCallBacks(PseudoClockScheduler.java:203)
	at org.drools.time.impl.PseudoClockScheduler.advanceTime(PseudoClockScheduler.java:156)