drools-worker threads are created but not cleaned up

Could be reproduced as well in Tomcat 7, Wildfly 10.0 as in Weblogic 12.2.1: 1.) Deploy KIE Execution Server 2.) Create a new KIE container via REST API 3.) Monitor threads with VisualVM -> having 9 threads called drools-worker-1, drools-worker-2, etc. on a 8-core machine 4.) Delete KIE container with REST API 5.) Undeploy application KIE execution server 6.) Monitor threads with VisualVM -> still 9 threads are around If these steps are repeated, the new threads are added each time to the JVM. These leads to a memory leak after some time, as every time you redeploy the application it will create the new threads.