[rules-users] NPE after rule consequence executes

[Scott Reed]

Sorry, the NPE is in ReteTuple.get(Declaration)

Scott Reed's message received 4/8/2008 7:38 PM:
> Running Drools 4.0.3, on Win 2k sp4, JDK 1.6.0_03.
>
> I am getting this exception after the debugger shows execution has 
> gone past the end of the rule. The exception is occurring in 
> ReteTuple.get(Descriptor). I believe the descriptor argument is null. 
> Can anyone suggest why this might be happening and what I can do to 
> avoid it?
> Thanks,
>  Scott
>
> java.lang.NullPointerException
>    at org.drools.reteoo.ReteTuple.get(ReteTuple.java:97)
>    at 
> org.fp.findata.Rule_2MS__Calculate_now_scheduled_or_periodic_transaction_0ConsequenceInvoker.evaluate(Rule_2MS__Calculate_now_scheduled_or_periodic_transaction_0ConsequenceInvoker.java:19) 
>
>    at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:550)
>    at 
> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:514)
>    at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:471) 
>
>    at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:433) 
>
>    at 
> org.fp.rules.RuleEngineManager$RunTask.run(RuleEngineManager.java:225)
> org.drools.spi.ConsequenceException: java.lang.NullPointerException
>    at 
> org.drools.base.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:14) 
>
>    at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:554)
>    at 
> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:514)
>    at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:471) 
>
>    at 
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:433) 
>
>    at 
> org.fp.rules.RuleEngineManager$RunTask.run(RuleEngineManager.java:225)
> Caused by: java.lang.NullPointerException
>    at org.drools.reteoo.ReteTuple.get(ReteTuple.java:97)
>    at 
> org.fp.findata.Rule_2MS__Calculate_now_scheduled_or_periodic_transaction_0ConsequenceInvoker.evaluate(Rule_2MS__Calculate_now_scheduled_or_periodic_transaction_0ConsequenceInvoker.java:19) 
>
>    at 
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:550)
>    ... 4 more
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