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@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


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