This was caused by the MDS cache in mempool change: commit 06c94de584e6cd7d347bcdfb79d9fef4fed0d277 HEAD Author: Patrick Donnelly <pdonnell> Date: Mon Sep 11 15:21:52 2017 -0700 mds: support limiting cache by memory
Moving this bug to verified state Verified in ceph ceph-12.2.4-4.el7cp
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-2018:1259