[ http://issues.apache.org/jira/browse/GERONIMO-765?page=all ]
David Jencks closed GERONIMO-765:
---------------------------------
Resolution: Fixed
Assign To: Jeremy Boynes (was: David Jencks)
jeremy changed the driver based MCF to use the driver directly. Reopen if
there are any more problems.
> DriverManager is totally unsuited to enterprise software, and use in
> tranql-connector causes classloader problems
> -----------------------------------------------------------------------------------------------------------------
>
> Key: GERONIMO-765
> URL: http://issues.apache.org/jira/browse/GERONIMO-765
> Project: Geronimo
> Type: Bug
> Components: connector
> Versions: 1.0-M3
> Reporter: David Jencks
> Assignee: Jeremy Boynes
>
> DriverManager will not connect to drivers that aren't in the classloader of
> the code that calls DriverManager. This makes use of tranql connector tricky
> in scenarios such as the following:
> config 1 uses tranql connector, connects to some db.
> config 2, child of config 1, uses tranql connector, tries to use a different
> driver. DriverManager reports it cannot find a suitable driver for the URL.
> The tranql connector class that is calling DriverManager is in a parent
> classloader of the driver.
> possible solutions:
> 1) rearrange configurations so you never have tranql connector in your parent
> classloader.
> 2) write more tranql connector classes that use datasource and pooled
> datasource implementations
> 3) dynamically generate a class at runtime in the driver's classloader or a
> child classloader that calls DriverManager.
> In order of desirability, I'd say 2, 1, 3, but I think we have to investigate
> (3) since this problem is just about impossible to diagnose.
> Thanks to Dan Debrunner for pointing out this "feature" of DriverManager.
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