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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5316) Unload old JDBC drivers when done with them in the upgrade tests
Date Mon, 11 Jul 2011 17:12:59 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13063439#comment-13063439
] 

Kathey Marsden commented on DERBY-5316:
---------------------------------------

I only took a brief look at the patch so I may have missed it there already.  but think we
should omit the deregister for versions that have the DERBY-2905 fix where the deregister
should happen automatically.



> Unload old JDBC drivers when done with them in the upgrade tests
> ----------------------------------------------------------------
>
>                 Key: DERBY-5316
>                 URL: https://issues.apache.org/jira/browse/DERBY-5316
>             Project: Derby
>          Issue Type: Improvement
>          Components: Test
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>         Attachments: clear-threadlocal.diff, deregister-v2.diff, deregister.diff
>
>
> Discussed in this thread on derby-dev: http://mail-archives.apache.org/mod_mbox/db-derby-dev/201107.mbox/%3C4E146309.3000906@gmail.com%3E
> After we're done testing an old version in the upgrade tests, its classes are still loaded
in the JVM because the old driver is referenced in DriverManager. We should find a way to
unload the old drivers so that the memory usage of the upgrade tests is reduced. Now we typically
need to run with -XX:MaxPermSize=200M or similar options to work around this issue.

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