The actual Oracle message appears to be
DRG-11832 Request Entity Too Large
Request rejected because request entity is too large (HTTP_ERROR = 413).
Sigh; typical damned error message. Once had a DB throw an error substantially 'this should never happen'; printed my screen, took it down to the developer, and said, 'So, Ed, about this message ... '. Worked for Ingres, Sybase, Informix in software testing in a previous life.