MVEL Unable to resolve method exception on fact update ------------------------------------------------------ Key: DROOLS-418 URL: https://issues.jboss.org/browse/DROOLS-418 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 5.5.0.Final Environment: Linux Mint 15 Jboss 5.1 Reporter: Nedo Nedic Assignee: Mark Proctor Attachments: Classifier.xls The following rule will fail with an exception after update is called on a fact: rule "Classifier" no-loop true salience 65430 when $sn:Snort(sig_priority == "1", type == null) then $sn.setType("LOW"); update($sn); end Snort fact type declaration: declare Snort @role( event ) @timestamp( event_date ) @expires( 1h ) dport: String data: String sport: String hostname: String type: String sig_priority: String sensor: String id: java.lang.Long sig_class_name: String ip_dst: String sig_name: String event_date: java.util.Date ip_src: String end [Error: unable to resolve method: java.util.ArrayList.type() [arglength=0]] [Near : {... type == "LOW" ....}] ^ [Line: 1, Column: 1] at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1071) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:980) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(ReflectiveAccessorOptimizer.java:670) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanPropertyAO(ReflectiveAccessorOptimizer.java:465) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:370) at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:140) at org.mvel2.ast.ASTNode.optimize(ASTNode.java:159) at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:115) at org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:114) at org.mvel2.MVELRuntime.execute(MVELRuntime.java:86) at org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123) at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119) at org.mvel2.MVEL.executeExpression(MVEL.java:930) at org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:73) at org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:52) at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:218) at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:175) at org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:655) at org.drools.reteoo.ReteooWorkingMemory$EvaluateResultConstraints.execute(ReteooWorkingMemory.java:594) at org.drools.common.PropagationContextImpl.evaluateActionQueue(PropagationContextImpl.java:364) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:371) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:327) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:950) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:894) at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)