java.lang.NullPointerException at org.drools.core.reteoo.NodeTypeEnums.isBetaNode(NodeTypeEnums.java:88) -------------------------------------------------------------------------------------------------------- Key: DROOLS-978 URL: https://issues.jboss.org/browse/DROOLS-978 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 6.3.0.Final, 6.4.x Environment: JDK6 Win7 64bit Reporter: bing yang Assignee: Mario Fusco Labels: jboss when i update the stateful rule in the kfs, then it gives me the NPE: the 6.3.0.Final and the 6.4.0-snapshot can throws this exception: Exception in thread "main" java.lang.NullPointerException at org.drools.core.reteoo.NodeTypeEnums.isBetaNode(NodeTypeEnums.java:88) at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:254) at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:166) at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:123) at org.drools.core.phreak.RuleExecutor.evaluateNetwork(RuleExecutor.java:65) at org.drools.core.common.DefaultAgenda.evaluateEagerList(DefaultAgenda.java:1004) at org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:961) at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1292) at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1294) at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1281) at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1260) at com.test.rule.engine.drools.stateful.StatefulRuleEngine.fireRules(StatefulRuleEngine.java:197) at com.test.demo.EngineDemo.main(EngineDemo.java:61)