OK - looks like I will have to solve this one myself.
Turns out that I needed to specify this additional field in my datasource
descriptor (ms-sql.ds).
<!-- sql to call to check exiting connection is still ok -->
<check-valid-connection-sql>select top 1 name from sysobjects with
(nolock)</check-valid-connection-sql>
This is apparently called before a pooled connection is used, if it fails (say
because the connection is closed!!!!) - then the connection is released and a
new one is used.
Thus - I can now reset my database server without my JBoss application dying a
horrible horrible death.
Fantastic!
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