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Bug
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Resolution: Done
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Major
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5.1.0.M1
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None
My (albeit improper) rule syntax that caused the NPE error:
when
QueueList ( queueIds contains 1 )
( not EventList ( events contains 1 )
| ( $eventList : EventList ( events contains 1 ) && RfEvent ( eventTypeId == 1, lastActivationLong after[-1h] sessionTime ) from $eventList.events ) ) then modify (eventList) { add(1) } |
|---|
Stack Trace:
org.drools.runtime.rule.ConsequenceException: java.lang.NullPointerException
at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885)
at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1086)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:660)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:627)
at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:183)
at com.famc.service.RuleFlowRunner.main(RuleFlowRunner.java:118)
Caused by: java.lang.NullPointerException
at org.drools.base.mvel.DroolsMVELFactory.getTupleObjectFor(DroolsMVELFactory.java:182)
at org.drools.base.mvel.DroolsMVELFactory.setContext(DroolsMVELFactory.java:176)
at org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:57)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934)
... 6 more
Request for ticket:
[10:19] <etirelli> jary: raising a NPE is clearly a bug, but the reason is that you have modify(eventList) instead of modify($eventList)... in any case, the way you authored the rule is not ideal
[10:19] <etirelli> jary: could you please open a JIRA so that we can provide an appropriate error message, please?
