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https://issues.apache.org/jira/browse/OFBIZ-4043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12971842#action_12971842
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Erwan de FERRIERES commented on OFBIZ-4043:
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Jacques,

I just upgraded the Derby driver. Maybe this could help ?

> Memory leaks in (at least) stable demo
> --------------------------------------
>
>                 Key: OFBIZ-4043
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-4043
>             Project: OFBiz
>          Issue Type: Bug
>    Affects Versions: Release Branch 09.04
>         Environment: On OFBiz demo stable
>            Reporter: Jacques Le Roux
>         Attachments: Leaks Suspect .jpg, screenshot-2 (Timer thread).jpg
>
>
> Using [Mat|http://www.eclipse.org/mat/]
> I generated these report
> 110 542 instances of "org.apache.derby.impl.jdbc.EmbedConnection40", loaded 
> by "java.net.URLClassLoader @ 0x7f3681c111f0" occupy 415 680 440 (79,89%) 
> bytes. These instances are referenced from one instance of 
> "java.util.WeakHashMap$Entry[]", loaded by "<system class loader>"
> Keywords
> java.net.URLClassLoader @ 0x7f3681c111f0
> org.apache.derby.impl.jdbc.EmbedConnection40
> java.util.WeakHashMap$Entry[]
> It's not quite clear to me how this happends, but I'm quite sure it happens 
> in stable demo and maybe also in trunk. I have also attached a screen-copy 
> with more information

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