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From "Thomas Mueller (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JCR-1216) Unreferenced sessions should get garbage collected
Date Thu, 12 Mar 2009 10:44:51 GMT

     [ https://issues.apache.org/jira/browse/JCR-1216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Mueller updated JCR-1216:
--------------------------------

    Attachment: referencePatch.txt

Hopefully the final patch. Using WeakReferences again.

> Unreferenced sessions should get garbage collected
> --------------------------------------------------
>
>                 Key: JCR-1216
>                 URL: https://issues.apache.org/jira/browse/JCR-1216
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core
>            Reporter: Thomas Mueller
>            Assignee: Thomas Mueller
>         Attachments: referencePatch.txt, softReferencePatch.txt, userSessionPatch.txt,
weakReferencePatch.txt
>
>
> If an application opens many sessions and doesn't close them, they are never garbage
collected. After some time, the virtual machine will run out of memory. This code will run
out of memory after a few thousand logins:
> Repository rep = new TransientRepository();
> for (int i = 0; ; i++) {
>   rep.login(new SimpleCredentials("", new char[0]));
> }
> Using a finalizer to close SessionImpl doesn't work, because it seems there are references
from the (hard referenced part of the cache) to the SessionImpl objects. Maybe it is possible
to remove those references, or change them to weak references.

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