Defining non default Kie Base and Kie Session results in a hang in the Test Scenario Runner ------------------------------------------------------------------------------------------- Key: DROOLS-3724 URL: https://issues.jboss.org/browse/DROOLS-3724 Project: Drools Issue Type: Bug Components: Test Scenarios Editor Reporter: Jim Tyrrell Assignee: Toni Rikkola Priority: Blocker Labels: ScenarioSimulation If I use the Settings of a project to created a Kie Base and Kie Session I end up with the UI hanging, and I can't continue until I do a control-R to reload the web application. Web Applications should never hang. Given a DRL like this: package com.myspace.annual_rent_decision; import com.myspace.annual_rent_decision.Lease; rule "Is signoff required" when lease : Lease(leaseAgreementAmount >= 80000) // eval(true) then System.out.println("Setting signOffRequired to True"); lease.setSignOffRequired(true); end A simple fact model to support it. You will find the below issue.