[Bug 1533728] [NEW] libvirt unable to create more than one snapshot

[Thomas Stinner]

Public bug reported:

I try to create an external snapshot of a running VM to be able to
backup the machine.

I do the following:


virsh snapshot-create-as --domain Windows10Pro Snapshot3 --diskspec hda,file=/data/snapshots/Windows10ProSnapshot3 --disk-only --atomic --quiesce --no-metadata

After backing up the data i blockcommit the snapshot:

virsh blockcommit Windows10Pro hda --active --verbose --pivot

I then manually delete the Snapshot from the disk.

This works perfectly for the first time.

The second time i want to do it, i get the following error:

error: internal error: unable to execute QEMU command 'transaction': The
feature 'snapshot' is not enabled


I can only solve this by rebooting the machine. Restarting libvirtd-bin or qemu-kvm does not help.

This is Ubunut 16.04, libvirt is  1.2.21-2ubuntu7

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1533728

Title:
  libvirt unable to create more than one snapshot

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