I think I've hit the same problem that Predrag reported in http://comments.gmane.org/gmane.comp.emulators.libvirt.user/8825. With libvirt-1.3.2-1.fc23.x86_64 on Fedora 23, when I try uploading an image with vol-upload to a user libvirtd (qemu:///session): virsh vol-upload --pool default volume.qcow /path/to/file.qcow2 I am getting: error: Disconnected from qemu:///session due to I/O error error: cannot send data to volume volume.qcow2 error: Cannot write data: Broken pipe error: One or more references were leaked after disconnect from the hypervisor If I downgrade to libvirt-1.2.18.2-2.fc23.x86_64 (which is what actually ships in F23), the image upload completes without a problem. -- Lars Kellogg-Stedman <lars(a)redhat.com&gt; | larsks @ {freenode,twitter,github} Cloud Engineering / OpenStack | http://blog.oddbit.com/