Ceph/ODF: MDS allocates memory until OOM or memory exhaustion or "1 clients failing to respond to capability release".

Issue

The Ceph MDS very rapidly allocates memory until either an OOM occurs or memory exhaustion occurs on the node hosting the MDS.

The same code issue can manifest as a "HEALTH_WARN" with "1 clients failing to respond to capability release"

-bash 5.1 $ ceph -s
  cluster:
    id:     8d23xxxx-redacted-cluster-ID-yyyya00794f2
    health: HEALTH_WARN
            1 clients failing to respond to capability release

  services:
    mon: 3 daemons, quorum cefesp000003,cefesp000002,cefesp000001 (age 11w)
    mgr: cefesp000003(active, since 2M), standbys: cefesp000002, cefesp000001
    mds: 1/1 daemons up, 2 standby
    osd: 321 osds: 321 up (since 12d), 321 in (since 2w)

  data:
    volumes: 1/1 healthy
    pools:   14 pools, 13729 pgs
    objects: 106.82M objects, 61 TiB
    usage:   189 TiB used, 421 TiB / 610 TiB avail
    pgs:     13728 active+clean
             1     active+clean+scrubbing+deep

  io:
    client:   729 MiB/s rd, 345 MiB/s wr, 2.89k op/s rd, 4.47k op/s wr

-bash 5.1 $ ceph health detail
HEALTH_WARN 1 clients failing to respond to capability release
[WRN] MDS_CLIENT_LATE_RELEASE: 1 clients failing to respond to capability release
    mds.cephfs.cefesp000002.gruurg(mds.0): Client smeesp000032.mydomain.org:csi-cephfs-node failing to respond to capability release client_id: 390442015