slow ops after cephfs snapshot removal

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Hi all,

On Mimic 13.2.1, we are seeing blocked ops on cephfs after removing some snapshots:

[root@osd001 ~]# ceph -s
  cluster:
    id:     92bfcf0a-1d39-43b3-b60f-44f01b630e47
    health: HEALTH_WARN
            5 slow ops, oldest one blocked for 1162 sec, mon.mds03 has slow ops

  services:
    mon: 3 daemons, quorum mds01,mds02,mds03
    mgr: mds02(active), standbys: mds03, mds01
    mds: ceph_fs-2/2/2 up  {0=mds03=up:active,1=mds01=up:active}, 1 up:standby
    osd: 544 osds: 544 up, 544 in

  io:
    client:   5.4 KiB/s wr, 0 op/s rd, 0 op/s wr

[root@osd001 ~]# ceph health detail
HEALTH_WARN 5 slow ops, oldest one blocked for 1327 sec, mon.mds03 has slow ops
SLOW_OPS 5 slow ops, oldest one blocked for 1327 sec, mon.mds03 has slow ops

[root@osd001 ~]# ceph -v
ceph version 13.2.1 (5533ecdc0fda920179d7ad84e0aa65a127b20d77) mimic (stable)

Is this a known issue?

Cheers,

Kenneth

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