Bug #37725
Updated by Patrick Donnelly almost 4 years ago
Apparently due to checks that prevent export of pinned directories.
This should be reproducible with:
ceph fs set max_mds cephfs 2
mkdir -p foo/bar
setfattr -n ceph.dir.pin -v 1 foo
ceph fs set max_mds cephfs 1
ceph status # should show rank 1 stuck in up:stopping