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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-5173) RAFContainer.privGetRandomAccessFile() unwraps wrong exception type
Date Fri, 01 Apr 2011 13:27:06 GMT

     [ https://issues.apache.org/jira/browse/DERBY-5173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Knut Anders Hatlen updated DERBY-5173:

    Attachment: derby-5173-1a.diff

I'm not sure if there's an easy way to add a regression test for this bug, or if it's worthwhile
given that the issue is mostly cosmetic and the bug is somewhat of an edge case.

In any case, here's a fix for the problem. Following the steps to reproduce described in the
previous comment, I now get this error message:

ij> connect 'jdbc:derby:db;dataEncryption=true;bootPassword=abc1234xyz';
ERROR XJ040: Failed to start database 'db' with class loader sun.misc.Launcher$AppClassLoader@18a80d4,
see the next exception for details.
ERROR XBCXU: Encryption of an un-encrypted database failed: Exception during creation of file
/tmp/db/seg0/n461.dat for container

The ClassCastException is gone. And if ij had called printStackTrace() or otherwise followed
the getCause() exception chain (it currently only follows the SQLException.getNextException()
chain), it would have shown the underlying exception too:

Caused by: java.io.FileNotFoundException: /tmp/db/seg0/n461.dat (Permission denied)
	at java.io.RandomAccessFile.open(Native Method)
	at java.io.RandomAccessFile.<init>(RandomAccessFile.java:233)
	at org.apache.derby.impl.io.DirRandomAccessFile.<init>(DirRandomAccessFile.java:57)
	at org.apache.derby.impl.io.DirFile4.getRandomAccessFile(DirFile4.java:275)
	at org.apache.derby.impl.store.raw.data.RAFContainer.run(RAFContainer.java:1692)
	... 45 more

> RAFContainer.privGetRandomAccessFile() unwraps wrong exception type
> -------------------------------------------------------------------
>                 Key: DERBY-5173
>                 URL: https://issues.apache.org/jira/browse/DERBY-5173
>             Project: Derby
>          Issue Type: Bug
>          Components: Store
>    Affects Versions:
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>         Attachments: derby-5173-1a.diff
> RAFContainer.privGetRandomAccessFile() catches and unwraps PrivilegedActionExceptions
raised in the privileged code:
>         catch( PrivilegedActionException pae){ 
>             throw (StandardException) pae.getException();
>         }
> The problem is that the privileged code is this:
>              return actionFile.getRandomAccessFile("rw");
> 		 } // end of case BACKUP_CONTAINER_ACTION
> getRandomAccessFile() only has one checked exception, and that is FileNotFoundException.
If it ever happens to raise FNFE, privGetRandomAccessFile() will fail with a ClassCastException
and hide the underlying error.

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