[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-4317) Memory leak in EnumType class.

[Ondrej Medek (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ondrej Medek updated HHH-4317:
------------------------------

    Attachment: enumtypeleak.war

A test case. Redeploy it several times, start Eclipse MAT, use a link "Duplicate Classes: Detect classes loaded by multiple class loaders." Right click "EntityWithEnumType" and choose "shortest path to ROOT GC excluding soft/weak references.

> Memory leak in EnumType class.
> ------------------------------
>
>                 Key: HHH-4317
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4317
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: annotations
>            Reporter: Paweł Kępka
>            Priority: Critical
>         Attachments: enumtypeleak.war
>
>
> Holding enum values in static enumValues map in EnumType class causes memory leaks on application server where hibernate is loaded by application server's common classloader (like for default configuration of JBoss4).
> SoftReference or SessionFactory based caching should be used instead. 

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