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Created attachment 742532 [details]
Log file

Description of problem:
  Libvirt cannot get image file through vol-download command.

Version-Release number of selected component (if applicable):
libvirt-1.0.4-1.1.el7.x86_64

Reproduce steps:
1. virsh -c qemu+ssh://10.66.7.84/system vol-download T1.img /var/lib/libvirt/images/T1-1.img --pool default

Actual results:
1. Got following error:
[root@localhost libvirt]# virsh -c qemu+ssh://10.66.7.84/system vol-download T1.img /var/lib/libvirt/images/T1-1.img --pool default
The authenticity of host '10.66.7.84 (10.66.7.84)' can't be established.
RSA key fingerprint is 3b:9f:c8:0a:8c:91:12:742:60:97:39:bb:97:4b:43.
Are you sure you want to continue connecting (yes/no)? yes
root.7.84's password: 
error: cannot receive data from volume T1.img
error: stream had I/O failure
The authenticity of host '10.66.7.84 (10.66.7.84)' can't be established.
RSA key fingerprint is 3b:9f:c8:0a:8c:91:12:742:60:97:39:bb:97:4b:43.
Are you sure you want to continue connecting (yes/no)? yes
root.7.84's password: 
error: Reconnected to the hypervisor

Expected results:
1. Image file should be copied normally.
 
Additional info:
1. There is a closed bug on rhel6: https://bugzilla.redhat.com/show_bug.cgi?id=741337

*** This bug has been marked as a duplicate of bug 950416 ***