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

[Esteban Aliverti (JIRA)]

    [ https://issues.jboss.org/browse/JBRULES-2734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12602791#comment-12602791 ] 

Esteban Aliverti commented on JBRULES-2734:
-------------------------------------------

Ok, I made a fix for this issue: https://github.com/droolsjbpm/drools/compare/585cf7b...735b629
Please test if this fix your problem.

> 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
>             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 at 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);

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