[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-2734) NPE loading changeset

NPE loading changeset --------------------- Key: JBRULES-2734 URL: https://issues.jboss.org/browse/JBRULES-2734 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core (expert) Affects Versions: 5.1.1.FINAL Reporter: Tommy Odom Assignee: Esteban Aliverti Labels: knowledge_agent, package_serialization Fix For: 5.2.0.CR1 We are receiving a NPE when drools is attempting to load the deltas from guvnor in our webapp. This used to work fine in 5.0 but we recently upgraded to 5.1 and started receiving this error after we create a new snapshot in guvnor. The output from our application server log is: KnowledgeAgent applying ChangeSet KnowledgeAgent performing an incremental build of the ChangeSet no visitor implementation for : class org.drools.ruleflow.core.RuleFlowProcess : org.drools.ruleflow.core.RuleFlowProcess@30012e Exception in thread "Thread-36" org.drools.RuntimeDroolsException: java.lang.reflect.InvocationTargetException : [R ule name=Project Part Custom Finishing Cost, agendaGroup=MAIN, salience=0, no-loop=false] at org.drools.core.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:56) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.diff(BinaryResourceDiffProducerImpl.java:63) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:785) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:586) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1106) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.drools.core.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:47) ... 6 more Caused by: java.lang.NullPointerException at org.drools.rule.EvalCondition.equals(EvalCondition.java:169) at org.drools.rule.GroupElement.equals(GroupElement.java:273) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.compareRules(BinaryResourceDiffProducerImpl.java:258) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.visitRule(BinaryResourceDiffProducerImpl.java:117) ... 11 more The rule that it mentions in the error is: dialect "java" ruleflow-group "finishing-price" when $pp : ProjectPart(finishTime > 0) eval(salesChannelId != 4 && includeFinishing) then double finishingRate = 1; double customFinishingCost = $pp.getQuantity() * $pp.getFinishTime() * finishingRate; addToProjectFinishingCost($pp.getProject(), customFinishingCost);