lsof many many files

I'm looking for an issue on a given Linux server ( 7.2 ), and this one seems a bit weird:

When I run this command as a non-root, it replies with a number I think is way too high:

$ lsof | wc -l

919938

$

There's some Oracle software running, but not much actually. Most of these lines tell it is Java having these files open.

So, do I get it right, there's about 1 million files open, by let's say maybe 10 or so Java processes ?

Is that, normal ?

When I stop the Oracle software, it falls to a couple of thousand, or even less - I need to re-check