Ceph » CephFS

The subvolume ls with groupname as '_nogroup' crashes

# bin/ceph fs subvolume ls a --group-name=_nogroup
*** DEVELOPER MODE: setting PATH, PYTHONPATH and LD_LIBRARY_PATH ***
2022-05-25T11:58:18.672+0530 7fd40eb4d700 -1 WARNING: all dangerous and experimental features are enabled.
2022-05-25T11:58:18.684+0530 7fd40eb4d700 -1 WARNING: all dangerous and experimental features are enabled.
Error EINVAL: Traceback (most recent call last):
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/mgr_module.py", line 1703, in _handle_command
    return self.handle_command(inbuf, cmd)
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/volumes/module.py", line 450, in handle_command
    return handler(inbuf, cmd)
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/volumes/module.py", line 38, in wrap
    return f(self, inbuf, cmd)
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/volumes/module.py", line 567, in _cmd_fs_subvolume_ls
    return self.vc.list_subvolumes(vol_name=cmd['vol_name'],
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/volumes/fs/volume.py", line 461, in list_subvolumes
    with open_group(fs_handle, self.volspec, groupname) as group:
  File "/usr/lib/python3.8/contextlib.py", line 113, in __enter__
    return next(self.gen)
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/volumes/fs/operations/group.py", line 179, in open_group
    group = Group(fs, vol_spec, groupname)
  File "/root/sandbox/kotresh-ceph/ceph/src/pybind/mgr/volumes/fs/operations/group.py", line 23, in __init__
    assert groupname != Group.NO_GROUP_NAME
AssertionError