MDS stuck in up:stopping state

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After scaling the number of MDS daemons down, we now have a daemon stuck in the
"up:stopping" state. The documentation says it can take several minutes to stop the
daemon, but it has been stuck in this state for almost a full day. According to
the "ceph fs status" output attached below, it still holds information about 2
inodes, which we assume is the reason why it cannot stop completely.

Does anyone know what we can do to finally stop it?


cephfs - 71 clients
======
RANK   STATE        MDS         ACTIVITY     DNS    INOS
 0     active   ceph-mon-01  Reqs:    0 /s  15.7M  15.4M
 1     active   ceph-mon-02  Reqs:   48 /s  19.7M  17.1M
 2    stopping  ceph-mon-03                    0      2
      POOL         TYPE     USED  AVAIL
cephfs_metadata  metadata   652G   185T
  cephfs_data      data    1637T   539T
   STANDBY MDS
ceph-mon-03-mds-2
MDS version: ceph version 15.2.11 (e3523634d9c2227df9af89a4eac33d16738c49cb) octopus (stable)
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