[rules-users] NPE after rule consequence executes

[Scott Reed]

I am seeing the same ReteTuple.get( Declaration ) NPE when I run the app 
with both 4.0.7 jars.
If this is a known bug, it appears not to have been fixed in this version.

Edson Tirelli's message received 4/9/2008 8:05 PM:
>
>    yes, the error in a test would stop the build process. Use the skip 
> option I mentioned in my other e-mail.
>
>    []s
>    Edson
>
> 2008/4/9 Scott Reed <sreed at avacoda.com <mailto:sreed at avacoda.com>>:
>
>     I think the compiler jar failed to build perhaps due to the error?
>
>     Edson Tirelli's message received 4/9/2008 6:14 PM:
>>
>>        After the build, you can find the jars in:
>>
>>     drools-core/target
>>     drools-compiler/target
>>
>>        Their version must always match or you will end up with other
>>     problems.
>>
>>         []s
>>         Edson
>>
>>
>>
>>     2008/4/9 Scott Reed <sreed at avacoda.com <mailto:sreed at avacoda.com>>:
>>
>>         I built it but can only find the core jar file, nothing for
>>         the compiler. With just the core jar replaced, I still get
>>         the NPE.
>>
>>         Edson Tirelli's message received 4/9/2008 2:24 PM:
>>>
>>>            Nope, only source code.
>>>            Problem is 4.0.x will be released as 4.0.7, and if your
>>>         specific problem is fixed and you are not able to test
>>>         before the release, it will have to wait 4.0.8. <http://4.0.8.>
>>>
>>>            All you need to build drools is java, maven and ant. Can
>>>         you set this up?
>>>
>>>            []s
>>>            Edson
>>>
>>>
>>>         2008/4/9 Scott Reed <sreed at avacoda.com
>>>         <mailto:sreed at avacoda.com>>:
>>>
>>>             Glad to hear that. However, I am not set up to do my own
>>>             drools build and it looks like the link you sent is for
>>>             the source. Is there a set of jars for 4.0.x that I can
>>>             test from? Here is what I am using now:
>>>
>>>                 antlr-runtime-3.0.jar
>>>                 core-3.2.3.v_686_R32x.jar
>>>                 drools-compiler-4.0.4.jar
>>>                 drools-core-4.0.4.jar
>>>                 mvel14-1.2.21.jar
>>>                 xstream-1.2.2.jar
>>>
>>>             Thanks,
>>>               Scott
>>>
>>>             Edson Tirelli's message received 4/9/2008 11:46 AM:
>>>>
>>>>                Scott,
>>>>
>>>>                I believe this is fixed already. Can you try it out
>>>>             and let us know?
>>>>
>>>>             http://anonsvn.labs.jboss.com/labs/jbossrules/branches/4.0.x/
>>>>
>>>>                []s
>>>>                Edson
>>>>
>>>>
>>>>             2008/4/8 Scott Reed <sreed at avacoda.com
>>>>             <mailto:sreed at avacoda.com>>:
>>>>
>>>>                 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
>>>>
> <snip>
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