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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6440) Connections opened by ForeignTableVTI never get released
Date Tue, 24 Dec 2013 13:10:55 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13856303#comment-13856303

ASF subversion and git services commented on DERBY-6440:

Commit 1553269 from [~rhillegas] in branch 'code/trunk'
[ https://svn.apache.org/r1553269 ]

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

> 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:
>            Reporter: Knut Anders Hatlen
>            Assignee: Rick Hillegas
>         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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