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https://issues.apache.org/activemq/browse/SM-1524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guillaume Nodet reopened SM-1524:
---------------------------------
Assignee: Gert Vanthienen (was: Guillaume Nodet)
> Fix for Memory Leak in ServiceMix-Drools4 DroolsEndpoint
> --------------------------------------------------------
>
> Key: SM-1524
> URL: https://issues.apache.org/activemq/browse/SM-1524
> Project: ServiceMix
> Issue Type: Bug
> Components: servicemix-drools
> Affects Versions: 3.2.1
> Reporter: Roman Stumm
> Assignee: Gert Vanthienen
> Fix For: 3.3
>
>
> There is a memory leak in class org.apache.servicemix.drools.DroolsEndpoint,
> because the StatefulSession object must be released, otherwise the drools
> rulebase keeps a reference to it.
> (Description see drools docu:
> http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/html_single/index.html#d0e900
> Chapter 2.5.5
> The StatefulSession extends the WorkingMemory class. It simply adds async
> methods and a dispose() method. The ruleBase retains a reference to each
> StatefulSession is creates, so that it can update them when new rules are
> added, dispose() is needed to release the StatefulSession reference from the
> RuleBase, without it you can get memory leaks.
> )
> Here is the fix: (replace methods drools() and createWorkingMemory() with
> those in org.apache.servicemix.drools.DroolsEndpoint)
> protected void drools(MessageExchange exchange) throws Exception {
> StatefulSession memory = createWorkingMemory(exchange);
> try {
> populateWorkingMemory(memory, exchange);
> memory.fireAllRules();
> } finally {
> memory.dispose();
> }
> }
>
> protected StatefulSession createWorkingMemory(MessageExchange exchange)
> throws Exception {
> return ruleBase.newStatefulSession();
> }
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