Thanks.Looks like there is a bug already.Need to verify the versions of the fix though it says it was fixed on 5.2 and we are on 5.3(unless there some internal dependencies that uses earlier version) https://issues.jboss.org/browse/JBPM-3347 Thanks & Regards, Adarsh SENIOR LEAD DEVELOPMENT SPECIALIST SCJP, SCWCD FINANCE TECHNOLOGY HSBC BANK PLC HBEU 8 Canada Square,Canary Wharf, London,E14 5HQ,United Kingdom ------------------------------------------------------ Phone +44 207914720 Mobile 07595530105 Email. adarsh.chaini(a)hsbcib.com ________________________________ From: Stephen Masters <stephen.masters(a)me.com&gt; To: Rules Users List <rules-users(a)lists.jboss.org&gt; Date: 06/09/2013 16:01 Subject: Re: [rules-users] What is the defect tracking process for Drools Community Edition Sent by: rules-users-bounces(a)lists.jboss.org That sounds like a bug I came across a little while back. A bug in my code, not Drools. ;) If you create listeners and attach them to a session, then of course, you need to remove them manually. The session will have references to them, so they can never be garbage collected. It's the same with any callback model. However, if you do find an actual bug, you can raise it here: https://issues.jboss.org/secure/Dashboard.jspa Note that unless you are paying for support from JBoss, then you won't be getting a patch from them. If they fix the bug, then it will most likely be available in a later major binary release. And there will most likely be new bugs in that release. If you want a patch for Drools (community), you need to get the code and build it yourself. Steve On 6 Sep 2013, at 09:20, adarsh.chaini(a)hsbcib.com wrote: All, We are using drools as our rule engine in one of our mission critical application which is distributed in nature . Recently we have found a very bad memory leak with in the drools that does not clean the some of the listeners after the execution of the session(stateless in our case). This caused our distributed JVM's to grow quite rapidly in and we had to fix this by manually removing those listener which we never added as users of the API. What is the process to track this and find if this is already known and fixed in a later version. We are using the following components and dependencies where ${drools.ver} is <drools.ver>5.3.1.Final</drools.ver> <dependency> <groupId>org.drools</groupId> <artifactId>drools-core</artifactId> <version>${drools.ver}</version> </dependency> <dependency> <groupId>org.drools</groupId> <artifactId>drools-compiler</artifactId> <version>${drools.ver}</version> </dependency> <dependency> <groupId>org.drools</groupId> <artifactId>drools-spring</artifactId> <version>${drools.ver}</version> </dependency> <!-- --> <dependency> <groupId>org.drools</groupId> <artifactId>drools-decisiontables</ artifactId> <version>${drools.ver}</version> </dependency> Thanks & Regards, Adarsh ************************************************************ HSBC Bank plc may be solicited in the course of its placement efforts for a new issue, by investment clients of the firm for whom the Bank as a firm already provides other services. It may equally decide to allocate to its own proprietary book or with an associate of HSBC Group. This represents a potential conflict of interest. HSBC Bank plc has internal arrangements designed to ensure that the firm would give unbiased and full advice to the corporate finance client about the valuation and pricing of the offering as well as internal systems, controls and procedures to identify and manage conflicts of interest. HSBC Bank plc Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom Registered in England - Number 14259 Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority ************************************************************ ----------------------------------------- SAVE PAPER - THINK BEFORE YOU PRINT! This transmission has been issued by a member of the HSBC Group "HSBC" for the information of the addressee only and should not be reproduced and/or distributed to any other person. Each page attached hereto must be read in conjunction with any disclaimer which forms part of it. Unless otherwise stated, this transmission is neither an offer nor the solicitation of an offer to sell or purchase any investment. Its contents are based on information obtained from sources believed to be reliable but HSBC makes no representation and accepts no responsibility or liability as to its completeness or accuracy._______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ************************************************************ HSBC Bank plc may be solicited in the course of its placement efforts for a new issue, by investment clients of the firm for whom the Bank as a firm already provides other services. It may equally decide to allocate to its own proprietary book or with an associate of HSBC Group. This represents a potential conflict of interest. HSBC Bank plc has internal arrangements designed to ensure that the firm would give unbiased and full advice to the corporate finance client about the valuation and pricing of the offering as well as internal systems, controls and procedures to identify and manage conflicts of interest. HSBC Bank plc Registered Office: 8 Canada Square, London E14 5HQ, United Kingdom Registered in England - Number 14259 Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority ************************************************************