Description:
The JDBC specification isn't clear on this, but I'd have expected the fragment in the 'how
to repeat' field below to work. At the moment the result set returned by the
getGeneratedKeys call doesn't know what it's owning statement is, so the final
stmt.close() will throw a NullPointerException.

How to repeat:
stmt = conn.prepareStatement("insert into ...", Statement.RETURN_GENERATED_KEYS);
...
stmt.execute();
rs = stmt.getGeneratedKeys();
...
stmt = rs.getStatement();
stmt.close();

Suggested fix:
com/mysql/jdbc/Statement.java:getGeneratedKeys perhaps ought to call 'setStatement' after
it creates the ResultSet, if that's the correct interpretation of the JDBC 3.0 spec.

This will end up in 3.0.12. You can check out a nightly snapshot from
http://downloads.mysql.com/snapshots.php if you need to test it earlier.