Hi Mark,
I don't have my sourcecode handy at the moment, but I could send you some working code/config for form based authentication using JDBC realm. For now, you might set the Glassfish's security logging to "finest". It will print out a lot of information but you might see the reason in your log file.
Just to make sure: You also set up the tablenames and and columns correctly for the JDBC realm (table/columnnames are identical in database?). And don't forget to put a username into the database and assign it to the group according to your policies. I don't know why Oracle stats are not showing any communication. It might be cached earlier and not requesting the data when you click "sign in" button.
Cheers,
Joerg
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