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https://issues.apache.org/jira/browse/DERBY-6440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14165806#comment-14165806
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ASF subversion and git services commented on DERBY-6440:
--------------------------------------------------------

Commit 1630596 from [email protected] in branch 'code/branches/10.10'
[ https://svn.apache.org/r1630596 ]

DERBY-6440: Drop connection to foreign database when foreignViews optional tool 
is unloaded.

backported change #1553269 from trunk to 10.10 branch.

> Connections opened by ForeignTableVTI never get released
> --------------------------------------------------------
>
>                 Key: DERBY-6440
>                 URL: https://issues.apache.org/jira/browse/DERBY-6440
>             Project: Derby
>          Issue Type: Bug
>          Components: Tools
>    Affects Versions: 10.11.1.1
>            Reporter: Knut Anders Hatlen
>            Assignee: Mike Matrigali
>             Fix For: 10.11.1.1
>
>         Attachments: derby-6440-01-aa-dropConnectionOnUnload.diff
>
>
> I noticed during a run of suites.All that one database instance never got 
> garbage collected, even after it had been shut down. It turned out it could 
> not get garbage collected because it was still referenced from the static 
> HashMap _connections in ForeignTableVTI. Looking closer at ForeignTableVTI, 
> it looks as if it only calls put() and get() on the HashMap, never remove(), 
> so its memory footprint will keep increasing as it is used.
> It would be good to have some way (preferably automatic) of releasing the 
> resources held by ForeignTableVTI when they are no longer needed.



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