I agree, ords not working since the upgrade glassfish 4.1.1, apex 5.03, ords 3.0.3
It is either ords or glassfish, a thread in APEX forum found a user putting ojdbc6.jar in glassfish library worked, but a reply in the thread mentioned a bug in 3.0.3
I have been receiving dispather errors in my debug also.
Note : Theme Roller was working fine for months until the upgrades..
Confirmed in Lab, and in Production
Reverted back to ORDS 3.0.2 and Theme Roller now works.