[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-3217) Memory leak in stateless session when using CommandFactory.newInsertElements()

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved JBRULES-3217.
----------------------------------

    Resolution: Done


Fixed by disposing stateful session created inside the stateless one after its execution. Also avoid to create a ProcessRuntime twice.

> Memory leak in stateless session when using CommandFactory.newInsertElements()
> ------------------------------------------------------------------------------
>
>                 Key: JBRULES-3217
>                 URL: https://issues.jboss.org/browse/JBRULES-3217
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>            Reporter: Mario Fusco
>            Assignee: Mario Fusco
>            Priority: Critical
>
> Description of problem:
> There is a memory leak when calling an execute method on
> StatelessKnowledgeSession with list of Commands(facts). See the reproducer.
> According to heap dump, the
> org.drools.command.runtime.rule.InsertElementsCommand is holding references to
> facts even after the execute() method is finished. 
> This is a regression from 5.1.0 GA.
> Version-Release number of selected component (if applicable):
> BRMS 5.2.0 ER3
> How reproducible:
> Always
> Steps to Reproduce:
> 1. Run the attached reproducer with ER3 binaries on classpath.
> 2. Look at stdout to see the raising heap used memory.
> Actual results:
> Heap used memory is raising.
> Expected results:
> Heap used memory is not raising. All unused object are collected.
> Additional info:
> When jBPM jars are not included in classpath, leak is away and memory usage in
> not raising.
> Memory leak does not occur when StatefulKnowledgeSession is used.
> Reported in bugzilla as: https://bugzilla.redhat.com/show_bug.cgi?id=734367

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