Hi,

I am seeing this error  after an offline  was deleted and while adding the host 
again. Thereafter, I have removed the /var/lib/cep  folder and removed the ceph 
quincy image in the offline host. What is the cause of this issue and the 
solution.

root@fl31ca104ja0201:/home/general# cephadm shell
Inferring fsid d0a3b6e0-d2c3-11ed-be05-a7a3a1d7a87e
Using recent ceph image 
quay.io/ceph/ceph@sha256:af79fedafc42237b7612fe2d18a9c64ca62a0b38ab362e614ad671efa4a0547e<mailto:quay.io/ceph/ceph@sha256:af79fedafc42237b7612fe2d18a9c64ca62a0b38ab362e614ad671efa4a0547e>
root@fl31ca104ja0201:/#

root@fl31ca104ja0201:/# ceph orch host rm fl31ca104ja0302 --offline --force

Removed offline host 'fl31ca104ja0302'

root@fl31ca104ja0201:/# ceph -s

  cluster:

    id:     d0a3b6e0-d2c3-11ed-be05-a7a3a1d7a87e

    health: HEALTH_OK



  services:

    mon: 3 daemons, quorum fl31ca104ja0201,fl31ca104ja0202,fl31ca104ja0203 (age 
28h)

    mgr: fl31ca104ja0203(active, since 6d), standbys: fl31ca104ja0202, 
fl31ca104ja0201

    mds: 1/1 daemons up, 2 standby

    osd: 33 osds: 33 up (since 28h), 33 in (since 28h)

    rgw: 3 daemons active (3 hosts, 1 zones)



  data:

    volumes: 1/1 healthy

    pools:   24 pools, 737 pgs

    objects: 613.56k objects, 1.9 TiB

    usage:   2.9 TiB used, 228 TiB / 231 TiB avail

    pgs:     737 active+clean



  io:

    client:   161 MiB/s rd, 75 op/s rd, 0 op/s wr


root@fl31ca104ja0201:/# ceph orch host add fl31ca104ja0302 10.45.219.5
Error EINVAL: Traceback (most recent call last):
  File "/usr/share/ceph/mgr/mgr_module.py", line 1756, in _handle_command
    return self.handle_command(inbuf, cmd)
  File "/usr/share/ceph/mgr/orchestrator/_interface.py", line 171, in 
handle_command
    return dispatch[cmd['prefix']].call(self, cmd, inbuf)
  File "/usr/share/ceph/mgr/mgr_module.py", line 462, in call
    return self.func(mgr, **kwargs)
  File "/usr/share/ceph/mgr/orchestrator/_interface.py", line 107, in <lambda>
    wrapper_copy = lambda *l_args, **l_kwargs: wrapper(*l_args, **l_kwargs)  # 
noqa: E731
  File "/usr/share/ceph/mgr/orchestrator/_interface.py", line 96, in wrapper
    return func(*args, **kwargs)
  File "/usr/share/ceph/mgr/orchestrator/module.py", line 356, in _add_host
    return self._apply_misc([s], False, Format.plain)
 File "/usr/share/ceph/mgr/orchestrator/module.py", line 1092, in _apply_misc
    raise_if_exception(completion)
  File "/usr/share/ceph/mgr/orchestrator/_interface.py", line 225, in 
raise_if_exception
    e = pickle.loads(c.serialized_exception)
TypeError: __init__() missing 2 required positional arguments: 'hostname' and 
'addr'

Thank you,
Anantha
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