How to use Multiple JDBC Drivers?

Hi,
I'm working with an application that connects to an Oracle 8 database and Oracle 10 databases as a single user/schema and then the application users all share the single Oracle user. When we use an Oracle 8 JDBC driver, then a module that inserts a large number of records (1500+) into an oracle table behaves inconsistently and either times out, pauses inserting records for exactly 1 hour, or throws an error. It also seems somewhat inconsistent from user to user.
The problem goes away when we use an Oracle 10 or Oracle 11 JDBC driver. However, the Oracle 10 JDBC driver has a problem with truncating the hh:mi:ss from datetime column types to 00:00:00. This is a known Oracle error and I know there is a flag that can fix this with the Oracle 10 driver. However, with the way the JDBC driver gets installed in the application, we are unable to set that flag.
Oracle 11 JDBC driver also doesn't have the Oracle 8 issue inserting a large number of records. However, we need to connect to an Oracle 8 database and Oracle 11 JDBC does not support that. The database is still active but being retired soon so no chance of upgrading to a newer Oracle version.
I asked on the application forum (it's SAP Manufacturing Intelligence and Integration - MII) and was told the following. Data Server is a name for the connection to the database.
"If the class packages are the same (assuming so since all of the oracle drivers I've seen use the same driver) then you can't have 2 at the same time, since they will overlap and you can't prioritize or point one data server to 8 and the other to 11."
My experiments with trying to use two drivers have also shown this to be the case for what I tried.
Any ideas or thoughts of how to make this work? We are using a JDK 1.5.
Thanks for the help.
Kerby Johnson

The most reliable way would be to load each driver (and all code using it) using its own classloader.
But that would likely be overly complicated.
The most viable solution will likely be (especially as this is a short term project, you say it's going to be retired soon) to ensure a commit after every smaller subset of the total data volume and keep using the Oracle 8 drivers.
Try forcing a commit after say every 100 records and see if you still have the timeout problems. Most likely this will take care of your problems at the cost of a slight performance decrease (but better somewhat less than optimal performance than risk database corruption or crashing applications, right?).

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