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https://issues.apache.org/jira/browse/DERBY-6354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845504#comment-13845504
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Knut Anders Hatlen commented on DERBY-6354:
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I don't understand how this happened either. But since the test case just
before it failed, with something that smells like a JVM bug, I think I would
assume for now that it is a follow-on problem caused by the page cache being in
some inconsistent state.
> DatabaseMetaDataTest.testGetColumnsReadOnly fails with NPE when releasing page
> ------------------------------------------------------------------------------
>
> Key: DERBY-6354
> URL: https://issues.apache.org/jira/browse/DERBY-6354
> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.11.0.0
> Reporter: Knut Anders Hatlen
> Attachments: derby-6343-diag.diff, fail-solaris.zip, fail-windows.zip
>
>
> Seen twice in the nightly testing lately:
> http://download.java.net/javadesktop/derby/request_5581975/javadb-task-3729984.html
> http://download.java.net/javadesktop/derby/request_5581997/javadb-task-3730576.html
> Both failures happened with JDK 8-ea-b107 (Windows and Solaris).
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