I am pleased to say that myearlier issue appears to have solved itself? But what is happening? I had to remake, recompile, redeploy and restart just to get tomcat and hibernate to play nicely with the database! Now I am unable to use the realm to authenticate users but I don't know why.
perhaps my wars are getting corrupted but what can i do to avoid this? I made NO code changes and the exception (jdbc is null) was no longer thrown ! It appears the same issue is now preventing my realm from running smoothly.