Isn't the whole "thing" about JPA (and all other ORMs ever) that you're supposed to "use it" instead of directly doing well optimized native queries on your database so that you can jump ship if the database provider turns out to be shit?
Nah everything we did was hand crafted for their specific db.
It was particularly bad because it was a very small family business with equally small customers. And they all had to buy oracle licenses first, which made us insanely expensive without making money lol.
Fun in hindsight
Random but flips are pretty much always bad hardware. That's what the literature says when you actually study it. And that's also what we find at work: we wrote a program that occupied most of the free ram and checked it for bit flips. Deployed on a sizeable fleet of machines. We found exactly that: yes there were bit flips, but they were highly concentrated on specific machines and disappeared after changing hardware.