Hi everyone My cluster ceph run currently 18.2.2 and ceph -s say everything are OK root@cthulhu1:/var/lib/ceph/crash# ceph -s cluster: id: 9c5bb196-c212-11ee-84f3-c3f2beae892d health: HEALTH_OK services: mon: 5 daemons, quorum cthulhu1,cthulhu5,cthulhu3,cthulhu4,cthulhu2 (age 4d) mgr: cthulhu1.yhgean(active, since 4d), standbys: cthulhu3.ylmosn, cthulhu5.hqiarz, cthulhu4.odtqjw, cthulhu2.ynvnob mds: 1/1 daemons up, 4 standby osd: 370 osds: 370 up (since 4d), 370 in (since 3M) data: volumes: 1/1 healthy pools: 4 pools, 259 pgs objects: 333.68M objects, 279 TiB usage: 423 TiB used, 5.3 PiB / 5.8 PiB avail pgs: 226 active+clean 19 active+clean+scrubbing+deep 14 active+clean+scrubbing I got 3 clients cephfs : 2 with debian 12 + 18.2.2 1 with Debian 11 + 17.2.7 The Debian 11 client work fine, I try to umount the cephfs and remount it and it's working The first Debian 12 + 18.2.2 are a upgrade from Debian 11 + 17.2.7 and before the update the mount was working, after the upgrade I'm unable to mount the cephfs The second Debian 12 is a fresh install and I'm also unable to mount the cephfs. I check the network and don't see any firewall problem. On the client when I try mount they take few minutes to answer me mount error: no mds server is up or the cluster is laggy on the client I can see : Jul 16 14:10:43 Debian12-1 kernel: [ 860.636012] ceph: corrupt mdsmap Jul 16 14:23:37 Debian12-2 kernel: [11497.406652] ceph: corrupt mdsmap I try to google this error but all I can find are the situation when ceph -s say it's in big trouble. On my case not only ceph -s say everything are ok but the Debian 11 are able to umount/mount/umount/mount/write Any clue or debugging method ? Regards -- Albert SHIH 🦫 🐸 Observatoire de Paris France Heure locale/Local time: mar. 16 juil. 2024 14:26:47 CEST