Sergii Shyika [http://community.jboss.org/people/sshyika] created the discussion "Re: KnowledgeBase keeps links to stateful sessions after disposing" To view the discussion, visit: http://community.jboss.org/message/640299#640299 -------------------------------------------------------------- Hi, Tihomir,  thank you for reply. I am observing memory leak with stateless sessions too. Here is simple code below: public static void main(String... args) {         KnowledgeBase base = KnowledgeBaseFactory.newKnowledgeBase();         waitForKeyPress();         for (int i = 0; i ();         for (int i = 0; i < 1000; i++) {             list.add(new Date());         }         return list;     }     private static void waitForKeyPress() {         try {             System.in.read(new byte[2]);         } catch (IOException e) {             e.printStackTrace();         }     } Here we simply create 500 stateless sessions and insert in each "heavy" object (list of 1000 dates). Below is jConsole screenshot made while programm waiting for second key press: http://community.jboss.org/servlet/JiveServlet/showImage/2-640299-17450/M... http://community.jboss.org/servlet/JiveServlet/downloadImage/2-640299-174... As you can see java process consumes ~3Mb before and 22Mb after invoiking sessions. Below is a screenshot of my debugger, that was made  after invoiking sessions: http://community.jboss.org/servlet/JiveServlet/showImage/2-640299-17451/D... http://community.jboss.org/servlet/JiveServlet/downloadImage/2-640299-174... You can see that knowledge base keeps 500 references to ProcessRuntime objects. The picture is the same when we using statefull sessions and dispose them by dispose() method. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/640299#640299] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]