When are XA Drivers necessary ?

Hi all,
I have a question about the purpose of XA Drivers.
Time ago we had a bug in a transation processing application
which doesn't use XA Drivers.
Because of that bug the application didn't rollback transactions in case of errors.
Since the ejb that controlled the tx is Container managed tx-Required, I was
told to investigate that the EJBException was correctly propagated to
the Container, and that was it.
So my question is: when are XA Drivers necessary ? only in Bean Managed tx ?
In CMT since it's the Container that drives the tx, it doesn't matter if I use them or not ?
Thanks in advance
Francesco

Francesco Marchioni wrote:
Hi all,
I have a question about the purpose of XA Drivers.
Time ago we had a bug in a transation processing application
which doesn't use XA Drivers.
Because of that bug the application didn't rollback transactions in case of errors.
Since the ejb that controlled the tx is Container managed tx-Required, I was
told to investigate that the EJBException was correctly propagated to
the Container, and that was it.
So my question is: when are XA Drivers necessary ? only in Bean Managed tx ?
In CMT since it's the Container that drives the tx, it doesn't matter if I use them or not ?
Thanks in advance
FrancescoXA is only needed if your transactions involve more than one DBMS.
Joe

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