Description of problem: InvalidClassException is thrown, when IsA operator is used in drl file and KieContainer.newKieSession() after KieContainer.getKieBase() is called. Version-Release number of selected component (if applicable): Drools 6.0.0-SNAPSHOT Drools 6.0.0.CR1 How reproducible: Pull request #234 submited in Drools. Steps to Reproduce: 1. Make a drl file with one rule, which uses isA operator. 2. Write a simple test. KieContainer.newKieSession() must be called after KieContainer.getKieBase() in this test. 3. Run test. Actual results: InvalidClassException is thrown. Expected results: Test should pass. Additional info:
Fixed by https://github.com/droolsjbpm/drools/commit/cdbc45f88
Verified on BRMS 6.0.0.ER4.