[rules-users] working memory error

[Wolfgang Laun]

Check the javadoc for java.lang.LinkageError. Most likely, you are
using different Drools versions for compiling the package and using
it.

-W

On 04/05/2012, Zhao Yi <zhaoyi0113 at gmail.com> wrote:
>
> I have two knowledge bases,one is drl file the other is pkg file. My
> application creates knowledge base from drl files first then create
> knowledge base from pkg file. There is nothing wrong when I create drl file
> knowledge base and fire rules, but I got below error when I create pkg file
> knowledge and fire the rules. Does anyone know what this issue mean?
>
> Caused by: java.lang.LinkageError: loader constraint violation: loader
> (instance of org/drools/rule/JavaDialectRuntimeData$PackageClassLoader)
> previously initiated loading for a different type with name
> "org/drools/WorkingMemory"
>
> --
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