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Re: KnowledgeBase keeps links to stateful sessions after disposing
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created by <a href="http://community.jboss.org/people/sshyika">Sergii Shyika</a> in <i>jBPM</i> - <a href="http://community.jboss.org/message/640299#640299">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi, Tihomir,  thank you for reply. I am observing memory leak with stateless sessions too. Here is simple code below:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public static void main(String... args) {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        KnowledgeBase base = KnowledgeBaseFactory.newKnowledgeBase();</p><p>         waitForKeyPress();</p><p>        for (int i = 0; i ();</p><p>        for (int i = 0; i &lt; 1000; i++) {</p><p>            list.add(new Date());</p><p>        }</p><p>        return list;</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    private static void waitForKeyPress() {</p><p>        try {</p><p>            System.in.read(new byte[2]);</p><p>        } catch (IOException e) {</p><p>            e.printStackTrace();</p><p>        }</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here we simply create 500 stateless sessions and insert in each "heavy" object (list of 1000 dates).</p><p>Below is jConsole screenshot made while programm waiting for second key press:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a href="http://community.jboss.org/servlet/JiveServlet/showImage/2-640299-17450/Memory.png"><span> http://community.jboss.org/servlet/JiveServlet/downloadImage/2-640299-17450/450-371/Memory.png </span></a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>As you can see java process consumes ~3Mb before and 22Mb after invoiking sessions.</p><p>Below is a screenshot of my debugger, that was made  after invoiking sessions:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a href="http://community.jboss.org/servlet/JiveServlet/showImage/2-640299-17451/Debug.png"><span> http://community.jboss.org/servlet/JiveServlet/downloadImage/2-640299-17451/450-415/Debug.png </span></a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>You can see that knowledge base keeps 500 references to ProcessRuntime objects.</p><p>The picture is the same when we using statefull sessions and dispose them by dispose() method.</p></div>
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