Unload old JDBC drivers when done with them in the upgrade tests
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Key: DERBY-5316
URL: https://issues.apache.org/jira/browse/DERBY-5316
Project: Derby
Issue Type: Improvement
Components: Test
Reporter: Knut Anders Hatlen
Discussed in this thread on derby-dev:
http://mail-archives.apache.org/mod_mbox/db-derby-dev/201107.mbox/%[email protected]%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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