[jboss-jira] [JBoss JIRA] (WFLY-12446) Memory leak in StatelessSessionComponent

[Brian Stansberry (Jira)]

    [ https://issues.jboss.org/browse/WFLY-12446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13782517#comment-13782517 ] 

Brian Stansberry commented on WFLY-12446:
-----------------------------------------

This input may be completely useless so don't assume otherwise. :)

In the source of the playground-jee8.zip in CommandServiceBean:

{code}
            // avoid memory leak
            logger.info("destroying commands to avoid memory leak!");
            for (Command command : commands) {
                commands.destroy(command);
            }
{code}

The Commands themselves are all SLSBs, injected via

@Any
@Inject
Instance<Command> commands;

Maybe irrelevant, or maybe it's a normal practice I just don't know about, or maybe it was an attempt to cure this leak that failed. But it seemed like an odd thing to do when the Command impls are all SLSBs.

> Memory leak in StatelessSessionComponent
> ----------------------------------------
>
>                 Key: WFLY-12446
>                 URL: https://issues.jboss.org/browse/WFLY-12446
>             Project: WildFly
>          Issue Type: Bug
>          Components: CDI / Weld, EJB
>    Affects Versions: 17.0.1.Final
>            Reporter: Joerg Baesner
>            Assignee: Cheng Fang
>            Priority: Major
>         Attachments: dump-weld.png, playground-jee8.zip, server.log.gz, wfly-12446-heap-dump.png
>
>
> When running the attached reproducer application and doing a memory analysis afterwards, it looks like a memory leak, e. g.
> {code}
> One instance of "org.jboss.as.ejb3.component.stateless.StatelessSessionComponent" loaded by "org.jboss.modules.ModuleClassLoader @ 0x5e0fbc2e0" occupies 936,593,520 (96.13%) bytes. The memory is accumulated in one instance of "java.util.concurrent.ConcurrentLinkedQueue$Node" loaded by "<system class loader>".
> {code}



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