Thanks for the reply, so far from documentation, I believe "newInstance"=true(default) replaces the old kb as a whole and =false will update the existing kb. But I didn't see anywhere explaining that if there is a compilation error on rules, it will not update the kb. And I verified. It updates the kb. I don't know if that is expected or bugs in this version.
Anyway, I found the workthrough by assigning the kb to the variable and update it only if there is not resourceCompilationFailed using knowledgeBaseUpdated event on KnowledgeAgentEventListener. Anyway, thanks for your help. -- View this message in context: http://drools.46999.n3.nabble.com/how-to-restore-the-knowledgeBase-when-newly-created-kb-has-compilationFailed-error-tp4027387p4027389.html Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users