ClassCastException at BuildUtils.mergeNodes with two rules having identical constraints --------------------------------------------------------------------------------------- Key: DROOLS-4580 URL: https://issues.jboss.org/browse/DROOLS-4580 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 7.27.0.Final Reporter: Martin Weiler Assignee: Mario Fusco Priority: Major Building a rule base where two rules have identical constraints fails with a ClassCastException: {noformat} java.lang.ClassCastException: org.drools.core.rule.constraint.EvaluatorConstraint cannot be cast to org.drools.core.rule.constraint.MvelConstraint at org.drools.core.reteoo.builder.BuildUtils.mergeNodes(BuildUtils.java:176) at org.drools.core.reteoo.builder.BuildUtils.attachNode(BuildUtils.java:152) at org.drools.core.reteoo.builder.GroupElementBuilder$AndBuilder.buildJoinNode(GroupElementBuilder.java:143) at org.drools.core.reteoo.builder.GroupElementBuilder$AndBuilder.build(GroupElementBuilder.java:110) at org.drools.core.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:68) at org.drools.core.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:167) at org.drools.core.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:139) at org.drools.core.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:110) at org.drools.core.impl.KnowledgeBaseImpl.internalAddRule(KnowledgeBaseImpl.java:1523) at org.drools.core.impl.KnowledgeBaseImpl.internalAddPackages(KnowledgeBaseImpl.java:913) at org.drools.core.impl.KnowledgeBaseImpl.lambda$addPackages$2(KnowledgeBaseImpl.java:715) at org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:732) at org.drools.core.impl.KnowledgeBaseImpl.addPackages(KnowledgeBaseImpl.java:715) at org.drools.compiler.kie.builder.impl.AbstractKieModule.createKieBase(AbstractKieModule.java:215) at org.drools.compiler.kie.builder.impl.KieContainerImpl.createKieBase(KieContainerImpl.java:406) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieBase(KieContainerImpl.java:396) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieBase(KieContainerImpl.java:391) at org.kie.internal.utils.KieHelper.build(KieHelper.java:80) at org.drools.compiler.integrationtests.ExpirationTest.testEventSameContraint(ExpirationTest.java:595) {noformat}