[rules-users] java.lang.ClassCastException: org.drools.reteoo.BetaMemory cannot be cast to org.drools.reteoo.AlphaNode$AlphaMemory

[Davide Sottara]

Could you submit a test case to isolate and reproduce the issue?

Adding rules dynamically works in general and is a
fundamental feature of many applications, but there
may be bugs affecting some scenarios.

Thanks
Davide


On 08/01/2013 07:47 AM, vlad_konov wrote:
> Hi, 
> nice to find this topic, I'm experiencing the same problem.
>
> Actually I have that "complex scenario", that was mentioned, like "add and
> remove rules dynamically from a knowledge base". 
> Does it mean that there is a known bug and it's going to be fixed? At this
> case is there any temporal workaround? 
> Or it means that adding or removing rules dynamically is not something that
> should be used at all?
>
> The Drools version is 5.5.0.Final
>
> Thank you very much in advance,
>
> Vlad.
>
> Davide Sottara wrote
>> The original thread was for a bug in 5.0.x, fixed in 5.1, but it would be
>> a
>> very serious issue in 5.5. 
>>
>> Causes could be an invalid rule in the first place (running the engine
>> without checking for compilation errors), a bug in the construction
>> process
>> (unlikely, unless the rule is a very rare edge case), or a complex
>> scenario
>> where you add and remove rules dynamically from a knowledge base....
>
>
>
>
> --
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