Fabian Depry created DERBY-6396:
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             Summary: 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


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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