Hi William,
thanks for looking at the stack traces! I upgraded to the latest version available in RHEL
7.4 (1.3.6.1-21.el7_4), this didn't change the behavior. I guess that the changes
you're talking about aren't yet available in RHEL.
So I think that we'll have to remain on SSHA512 hashing for now and try PBKDF2 again
sometime later.
Best regards,
Marian