You configure a data source with a non XA driver because your (non-Oracle) database does
not provide XA drivers. The data source will sometimes participate in global transactions
with an EJB, so as you configure the data source you select “Supports Global Transactions”
and One-phase commit. Why is this configuration wrong?
A.
You must choose an XA driver when a data source participates In global
transactions.
B.
“One’Phase Commit” always returns “ready” duringphase one ofthe two-phase
commit process’ so it is possible you will have heuristic errors in thedatabase.
C.
“One-Phase Commit” processes this data source last In the global transactions,if
the EJB must go last, you cannotuse this configuration.
D.
“One-Phase Commit” only allows this datasource to participate in global
transaction, so youcannothave a global transaction that includes an EJB.
A correct
D is correct.
http://docs.oracle.com/cd/E24329_01/web.1211/e24367/transactions.htm#JDBCA145
D
Select this option if you want to enable non-XA JDBC connections from the data source to participate in global transactions using the one-phase commit transaction processing. With this option, no other resources can participate in the global transaction.
One-Phase Commit