[rules-users] java.lang.LinkageError

[David Minor]

The webapps are both running in the same instance of Tomcat.

We're going to try to run a second instance of Tomcat on production
with the new version to see if we can replicate it.

On Fri, Aug 17, 2012 at 8:33 AM, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
> On 17/08/2012, David Minor <daveminor at gmail.com> wrote:
>> That was the root error, the rest is just drools firing its rules.
>>
>> So does this mean there's some sort of incompatibility in the class
>> ShoppingCart/Rule_CSMEGBUL_b996907c25e3495a94b6b041c1c08c50? I assume
>> this is a class that's auto-generated by drools. Is it possible that
>> serializing the rule Package is leading to an incompatible class
>> definition?
>
> It does contain compiled Java code. So if the DRL/Java compilation
> environment compared to the deployment environment differs w.r.t. to
> JDK version, you're in for trouble.
> -W
>
>>
>> On Thu, Aug 16, 2012 at 10:41 PM, Wolfgang Laun <wolfgang.laun at gmail.com>
>> wrote:
>>> Javadoc: Subclasses of LinkageError indicate that a class has some
>>> dependency on another class; however, the latter class has
>>> incompatibly changed after the compilation of the former class.
>>>
>>> Looks like some incompatibility between your development and
>>> deployment environment.
>>>
>>> Did you truncate any helpful message from the stack trace?
>>>
>>> -W
>>>
>>> On 17/08/2012, David Minor <daveminor at gmail.com> wrote:
>>>> Hi,
>>>>
>>>> We're in the process of moving our web apps from Java 5 to Java 7 and
>>>> Drools 3 to Drools 5.4.0. Our rule base is compiled and serialized to
>>>> the db by one app, and read from the db and fired by another.
>>>>
>>>> Everything went fine during testing, but when we tried to switch to
>>>> production we got this when firing the rule base:
>>>>
>>>> Caused by: java.lang.LinkageError:
>>>> ShoppingCart/Rule_CSMEGBUL_b996907c25e3495a94b6b041c1c08c50
>>>>         at
>>>> ShoppingCart.Rule_CSMEGBUL_b996907c25e3495a94b6b041c1c08c50Eval0InvokerGenerated.evaluate(Unknown
>>>> Source)
>>>>         at
>>>> ShoppingCart.Rule_CSMEGBUL_b996907c25e3495a94b6b041c1c08c50Eval0Invoker.evaluate(Unknown
>>>> Source)
>>>>         at
>>>> org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114)
>>>>         at
>>>> org.drools.reteoo.EvalConditionNode.assertLeftTuple(EvalConditionNode.java:178)
>>>> [snip]
>>>>
>>>> Does anyone have any ideas as to what might cause this?
>>>>
>>>> Here is the rule in question if that helps:
>>>>
>>>> rule "CSMEGBUL"
>>>>         salience -1
>>>>         agenda-group "SubtotalDependent"
>>>>         when
>>>>                 delegate: PromotionRuleDelegate ( )
>>>>                 cart: ShoppingCart ( )
>>>>                 eval (
>>>> delegate.checkDateRange("1181718000000","1497337200000") )
>>>>                 eval ( delegate.checkEnabled("false") )
>>>>                 eval ( delegate.cartHasPromoCode(cart, "CSMEGBUL") )
>>>>                 eval ( delegate.checkUsage(1,100027) )
>>>>         then
>>>>                 delegate.applyOrderDiscountAmount(cart, 100027, "10.0");
>>>>                 delegate.promoCodeApplied(cart, "CSMEGBUL");
>>>> end
>>>>
>>>>
>>>> --
>>>> _____________
>>>> David Minor
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>>
>>
>> --
>> _____________
>> David Minor
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
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-- 
_____________
David Minor