This is a follow up of https://bugzilla.redhat.com/show_bug.cgi?id=1406417 People have a workaround and can set it manually. This BZ is about setting a sane default instead of using the one configured on Ceph side (that can be unlimited in worse case).
After update there is the new default for ceph in overcloud
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2017:1748