[DERBY-6396] NullPointerException in DirFile

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.10.1.1
• Fix Version/s: 10.10.2.0, 10.11.1.1
• Component/s: Miscellaneous
• Environment: Windows 7
• Bug behavior facts: Seen in production
• Assignee: Knut Anders Hatlen
• Reporter: Fabian Depry
• Created: 29/Oct/13 00:42
• Updated: 21/Jan/15 00:23
• Resolved: 04/Nov/13 10:14

Description

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.