[rules-users] java.lang.NullPointerException at org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:56)

[Wolfgang Laun]

On 24/07/2012, Carolina Pellecchia <carolina.pellecchia at gmail.com> wrote:
> The entryPoint and obs aren't null. I'm sorry, where do you see the error?

No surprise: If the entryPoint were null, you'd have a NPE right
there, and not in NamedEntryPoint. If obs were null, nothing at all
would happen.

I'm investigating a little.

-W

>
>
> Carolina
>
> 2012/7/24 Wolfgang Laun <wolfgang.laun at gmail.com>
>
>> Well, then it's a bug in your code. Do we all agree on this now?
>>
>> -W
>>
>>
>> On 24/07/2012, Carolina Pellecchia <carolina.pellecchia at gmail.com> wrote:
>> >>>If there is an insert() call in
>> >>>org.tass.utils.ExpertSystemManager.java in line 156 then *this* is
>> >>>where the insert occurs, not the insert() in the rule.
>> >
>> > org.tass.utils.ExpertSystemManager.java is our class and the source
>> > code
>> is
>> > this:
>> >
>> > 153.         *public* *void* insertObservation(String entryPoint,
>> > Observation obs) {
>> >
>> >
>> > 154.                 *try* {
>> >
>> > 155.                     *if*(entryPoints.containsKey(entryPoint)) {
>> >
>> > 156.                         entryPoints.get(entryPoint).insert(obs);
>> >
>> > 157.
>> >
>> > 158.                         ksession.fireAllRules();
>> >
>> > 159.                     }
>> >
>> > 160.                 }
>> >
>> > 161.                 *catch* (Exception e) {
>> >
>> > 162.                     logger.error(e, e);
>> >
>> > 163.                 }
>> >
>> > 164.             }
>> >
>> >>>Where is org.tass.utils coming from?
>> >
>> > Where is org.tass.utils coming from? it is our class.
>> >
>> >
>> >>>It's still a mystery to me how it's possible to have a stack trace
>> >>>element from NamedEntryPoint.java line 48 - there's no code in this
>> >>>line.
>> >
>> >
>> > I agree, at the line 48 there isn't code. It would seem that "Drools
>> 5.3.0
>> > final" has different binary and  source code.
>> >
>> >
>> >>>There is another mystery : why this is working when getting rules from
>> >>> a
>> > DRL file and not from Guvnor ...
>> >>>Did you add the POJO model into the Guvnor's package ?
>> >
>> >
>> > Yes, I did.
>> >
>> >>>But if this is it, package compilation should raise a compilation
>> >>> error
>> > ...
>> >
>> >
>> > The package compilation is ok.
>> >
>> >
>> >>>What is sure is that the problem does not comes from the rules, as the
>> > stack trace shows an "insert" call outside the rules, otherwise there
>> would
>> > be a >>reteoo...ConsequenceInvocator (something like that) before ..
>> >
>> >
>> > yes, It is sure
>> >
>> >
>> >>>And a last question : is "org.tass.utils.ExpertSystemManager" a class
>> > from you, or does it take place into another third-party framework
>> > (that
>> > could use a >>different or modified version of drools).
>> >
>> >
>> > org.tass.utils.ExpertSystemManager.java is our class. We aren't using
>> > third-party
>> > framework.
>> >
>> >
>> > Thank you
>> >
>> > Carolina
>> >
>> >
>> > 2012/7/23 Vincent LEGENDRE <vincent.legendre at eurodecision.com>
>> >
>> >> There is another mystery : why this is working when getting rules from
>> >> a
>> >> DRL file and not from Guvnor ...
>> >> Did you add the POJO model into the Guvnor's package ?
>> >> But if this is it, package compilation should raise a compilation
>> >> error
>> >> ...
>> >>
>> >> What is sure is that the problem does not comes from the rules, as the
>> >> stack trace shows an "insert" call outside the rules, otherwise there
>> >> would
>> >> be a reteoo...ConsequenceInvocator (something like that) before ..
>> >>
>> >> And a last question : is "org.tass.utils.ExpertSystemManager" a class
>> >> from
>> >> you, or does it take place into another third-party framework (that
>> could
>> >> use a different or modified version of drools).
>> >>
>> >>
>> >> _______________________________________________
>> >> rules-users mailing list
>> >> rules-users at lists.jboss.org
>> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >>
>> >>
>> >
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