For non-xa connections also, though there will be multiple connections
acquired, all the work will be done by a single physical connection in a
particular transaction. This is achieved via connection sharing. So, work
done in SLSB X and SLSB Y will be atomic.
http://blogs.sun.com/JagadishPrasath/entry/connectionsharinginglassfish
If you could provide a simple test-case (probably using Derby database) where
this is reproducible, that would be helpful.
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