[ceph-users] Cephfs metadta pool suddenly full (100%) !

Hi all, Ceph  Nautilus 14.2.16. We encounter a strange and critical poblem since this morning. Our cephfs metadata pool suddenly grew from 2,7% to 100%! (in less than 5 hours) while there is no significant activities on the OSD data ! Here are some numbers: # ceph df RAW STORAGE:     CLASS     SIZE        AVAIL       USED        RAW USED %RAW USED     hdd       205 TiB     103 TiB     102 TiB      102 TiB         49.68     nvme      4.4 TiB     2.2 TiB     2.1 TiB      2.2 TiB         49.63     TOTAL     210 TiB     105 TiB     104 TiB      104 TiB         49.68 POOLS:     POOL                     ID     PGS      STORED OBJECTS     USED        %USED      MAX AVAIL     cephfs_data_home          7      512      11 TiB 22.58M      11 TiB      18.31        17 TiB     cephfs_metadata_home      8      128     724 GiB 2.32M     724 GiB     100.00           0 B     rbd_backup_vms            9     1024      19 TiB 5.00M      19 TiB      37.08        11 TiB The cephfs_data uses less than the half of the storage space, and there was no significant increase during the period (and before) where metadata became full. Is someone already encounter that ? Currently, I have no idea how I can solve this problem. The restart of associated OSD and mds services have not been useful. Let me know if you want more informations or logs. Thank you for your help. Regards, Hervé