Hi,
I'm having some trouble with an rbd image. I want to rename the current rbd and create a new rbd with the same name. I renamed the rbd with rbd mv, but it was still mapped on another node, so rbd mv gave me an error that it was unable to remove the source. I then unmapped the original rbd and tried to remove it. Despite it being unmapped, the cluster still believes that there is a watcher on the rbd: root@ceph-admin:~# rados -p poolname listwatchers rbdname.rbd watcher=x.x.x.x:0/2329830975 client.26367 cookie=48 root@ceph-admin:~# rbd rm -p poolname rbdname Removing image: 99% complete...failed.2014-05-20 11:50:15.023823 7fa6372e4780 -1 librbd: error removing header: (16) Device or resource busy rbd: error: image still has watchers This means the image is still open or the client using it crashed. Try again after closing/unmapping it or waiting 30s for the crashed client to timeout. I've already rebooted the node that the cluster claims is a watcher and confirmed it definitely is not mapped. I'm 99.9% sure that there are no nodes actually using this rbd. Does anyone know how I can get rid of it? Currently running ceph 0.73-1 on Ubuntu 12.04. Thanks J
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