Hello, After the latest run of system updates and reboots on our prototype Ceph cluster (Ubuntu Jammy + cephadm-managed Ceph 20.2.0 on Podman), we have ended up with something seriously weird. Specifically, at a glance the cluster appears to be in service: * Ceph reports the health of the cluster as OK * according to both 'ceph -s' and 'ceph orch ps', all the daemons which should be up and running ARE up and running. In particular, all the expected OSDs appear to be operational * 'ceph -s' shows no recovery I/O However: * despite all of the above, 'ceph -s' reports 1448 remapped PGs and about 24% objects classified as misplaced * 'ceph pg ls remapped' does report a long list of PGs with misplaced objects * on said list, most if not all PGs seem (I haven't checked all 1448 lines) to have 3 OSDs each listed under ACTING but only either 1 or 2 listed under UP - but not in a consistent way, in that an OSD missing from the UP list for one PG does appear on the UP lists of other PGs Any idea what might be going on here, and how to make it stop? We were about to upgrade that cluster to 20.2.1 following the system updates, however we are very much hesitant to do so while things look so odd in case the upgrade makes things worse. -- MS