[rules-users] NPE after rule consequence executes
Scott Reed
sreed at avacoda.com
Tue Apr 15 12:09:07 EDT 2008
Edson, I sent this reply to you directly a week ago but it timed today
(now).
I have no idea what is causing this so it's pretty much impossible for
me to create a self contained test. I can send you an installer for our
application with instructions so you can replicate the problem. I
couldn't post it in public.
Scott
Edson Tirelli's message received 4/10/2008 8:03 AM:
>
> Can you provide a self contained test to reproduce the problem and
> attach it to a JIRA? I will fix it.
>
> Thanks
>
> []s
> Edson
>
> 2008/4/9 Scott Reed <sreed at avacoda.com <mailto:sreed at avacoda.com>>:
>
> 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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>
> --
> Edson Tirelli
> JBoss Drools Core Development
> Office: +55 11 3529-6000
> Mobile: +55 11 9287-5646
> JBoss, a division of Red Hat @ www.jboss.com <http://www.jboss.com>
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