When upgrading to drools 5, valid drools 4 xml rules do not work. Drools just throws an unhelpful null pointer exception. What can the problem be?
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When upgrading to drools 5, valid drools 4 xml rules do not work. Drools just throws an unhelpful null pointer exception. What can the problem be?
The problem is that Drools 5 changed the namespace. Replace xmlns=”http://drools.org/drools-4.0″ with xmlns=”http://drools.org/drools-5.0″ and at least for simple rules that is all you need.
I hope that helps save someone the headache I just got dealing with this undocumented change.