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https://issues.apache.org/jira/browse/DERBY-2221?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel John Debrunner updated DERBY-2221:
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Derby Info: [Regression]
Do not see this on 10.2.1.6 and 10.2.2.0 when running the upgradeTests._Suite
with derbyTesting from 10.3 (trunk) and derby.jar from 10.2 (as the new
version) in the classpath.
> Cannot re-connect to 10.0 database after soft upgrade with 10.3 (trunk) code
> ----------------------------------------------------------------------------
>
> Key: DERBY-2221
> URL: https://issues.apache.org/jira/browse/DERBY-2221
> Project: Derby
> Issue Type: Bug
> Affects Versions: 10.3.0.0
> Reporter: Daniel John Debrunner
>
> Database fails to start with 10.0.2.1 after a 10.3 database has connected to
> it. Caused by a NullPointerException.
> Even if 10.0 is not a common starting point it would be good to track down
> what is causing this, it seems to be some on-disk format
> of an object has changed in an incompatible way.
> To reproduce run the JUnit upgrade test added by DERBY-2217
> org.apache.derbyTesting.functionTests.tests.upgradeTests._Suite
> setting the system property derbyTesting.jar.path to point to a folder that
> contains a 10.0.2.1 release in the folder 10.0.2.1.
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