[rules-dev] NPE with nested patterns

[Mauricio Salatino]

Mario, I was looking at that problem too.
Notice that if you remove some of the ANDs, the rule will work without
throwing the null pointer exception.
Which makes me think that it could be related with the number of
declarations or how the patterns are being arranged for that specific case.
The null pointer is raised when a hashcode is being calculated for a
declaration that doesn't have an object assigned, for some reason it's not
there.
One of the tests shows how we have splitted the rule in multiple rules
showing that each individual group of patterns is correct.. which make me
think again about the number of patterns and/or declarations can be causing
the issue.

Cheers

Keep us posted about your findings.. we can probably learn how to solve
these problems and stop bothering you :)

On Thu, Mar 15, 2012 at 8:39 AM, Mario Fusco <mario.fusco at gmail.com> wrote:

> I am going to give a look at it.
>
> On Thu, Mar 15, 2012 at 9:11 AM, Esteban Aliverti <
> esteban.aliverti at gmail.com> wrote:
>
>> Hi Guys,
>> I'm having a NPE in one of the rules I'm using and I can't find the
>> cause.
>> I'm attaching a test project that shows the problem.
>> Basically, I have 1 rule that contains some nested 'ands' and 'ors'
>> patterns. The rule is being auto-generated from some data, that is why it
>> has this strange structure.
>> We tried to refactor the rule by separating it in different
>> rules, extract some common factors, etc. and in some cases it works.
>> So I'm not sure whether the original rule is wrong or if I'm hitting a
>> bug in Drools.
>> Inside the test project you can find the original rule
>> (SimpleHighRiskSepsis.drl) and all the other refactors we did.
>>
>> Best Regards,
>>
>> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>>
>> Esteban Aliverti
>> - Developer @ http://www.plugtree.com
>> - Blog @ http://ilesteban.wordpress.com
>>
>> _______________________________________________
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>>
>>
>
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