> I very very rarely get this exception:
>
> org.firebirdsql.jdbc.FBSQLException: Resource Exception. Local
> transaction active: can't begin another
>
> What does it mean and how is the best way to go about finding it?

In theory it should not happen. The exception is thrown when new transaction
is started on the connection that has already an associated transaction. For
example this happens when for some reason the associated transaction was not
cleanly finished. After this message connection is not usable anymore. A bug
that was not yet fully fixed.

Roman