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https://issues.apache.org/jira/browse/DERBY-6396?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-6396:
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Attachment: check-null-with-test.diff
Attaching an updated patch that includes a test case
(check-null-with-test.diff). The test fails with a NullPointerException without
the fix (at least on platforms where java.io.File.setReadable() has an effect)
and passes with the fix. I've verified that the test passes on Windows and
Linux, with Java 6, 7 and 8. That should hopefully cover most platform
differences.
> NullPointerException in DirFile
> -------------------------------
>
> Key: DERBY-6396
> URL: https://issues.apache.org/jira/browse/DERBY-6396
> Project: Derby
> Issue Type: Bug
> Components: Miscellaneous
> Affects Versions: 10.10.1.1
> Environment: Windows 7
> Reporter: Fabian Depry
> Assignee: Knut Anders Hatlen
> Attachments: check-null.diff, check-null-with-test.diff
>
>
> We got a NullPointerException trying to start a Derby database in embedded
> mode; the stacktrace indicated it happened in
> org.apache.derby.impl.io.DirFile.deleteAll(); that method got called from
> org.apache.derby.impl.io.BaseStorageFactory.createTempDir().
> After investigating, it appears that the deleteAll() method calls
> "super.list()", which according to the java.io.File specifications, can
> return null. But the deleteAll() method doesn't handle that case gracefully.
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