[rules-users] fireUntilHalt() and OSGi - CPU load

Hi, I am using Drools 5.1 (final) in an OSGi environment. When invoking fireUntilHalt() for my StatefulKnowledgeSession, CPU load rises to 25% (meaning one complete core on the quad-core machine). Needless to say, when two sessions are used in different components at the same time I'm reaching about 50%. When creating an "ordinary" Drools project and using a StatefulKnowledgeSession with fireUntilHalt() I do not experience this problem. Anyone experienced something similar or has some advice for me? Any help would be highly appreciated :-) Thanks in advance! Cheers, Georg