9i AS mod-plsql RAC

Question

Does anyone know if there is a way for mod_plsql in 9iAS to detect node failure in a RAC environment?
It appears that when a node fails in a RAC environment mod_plsql sessions connected to the node hang. I suspect that is because the session does not die it is moved to another node but mod_plsql is not aware of it.
It looks like it is addressed in 10gAS with the connection validation parameter. However this is not an option in this case. Any suggestions are appreciated.
Thanks

Answer 1

There is another option if he is keeping his session information in a table.
You'll need:
1. Table with session_id and user_id in your customer app.
2. Table with form_name, form_id, and connection information. (you can normalize this if you wish)
3. Stored Procedure that accepts session_id and form_id and has output parameters for connection information (username, password, instance) and the form name.
4. New user that only has connect and execute on your stored procedure.
5. Add section to your formsweb.cfg file that has the userid and password specified of the user you created in the above step.
6. Create a form that accepts session_id and form_id parameters. The form will connect to the database specified in the formsweb.cfg file and then execute the stored procedure you created in step 3. Then form will then either show an access denied message or close the current connection, create a new connection, and then launch the intended form.
You could make it more secure by granting the launcher user a role that requires a password, grant the role your stored procedure, and then hard code the role password in the fmx. That way, the launcher user only has connect and a role that can't be turned on unless they have the role's password.