[richfaces-issues] [JBoss JIRA] Commented: (RF-3878) Session memory leak

[Lukas Krejci (JIRA)]

    [ https://jira.jboss.org/jira/browse/RF-3878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12530592#action_12530592 ] 

Lukas Krejci commented on RF-3878:
----------------------------------

Hi Rama,

our solution was to reduce those parameters to 2 and to optimize the size of the UI beans we create. Bear in mind that even the request scoped beans are still referenced by the views that are stored in the session this way so they are not garbage collected.

That was actually our problem. We had a big request scoped bean (the above referenced ResourceTreeModelUIBean) which was recreated for each view and then a number of such views were stored in session. So apart from reducing the number of views that we store in the session we minimized the memory usage of that bean.

Not sure if the request scoped beans are only kept around if they are marked as "keep-alive" (which they are in our case) or if they stay referenced by the stored views in any case.


> Session memory leak
> -------------------
>
>                 Key: RF-3878
>                 URL: https://jira.jboss.org/jira/browse/RF-3878
>             Project: RichFaces
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 3.2.0.SR1
>            Reporter: Dmitri Voronov
>            Assignee: Nick Belaevski
>             Fix For: 3.3.0
>
>
> AjaxStateHolder saves all views in the session. But the same view can occur several times in this "cache"; the views from this "cache" are not reused and just fill the session. If an application has many large views and deals with many concurrent sessions, the heap can easily grow up to Gigabytes(!)

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