libvirt users - Oct 2015 - Re: failed to pivot job for disk vdc

Hello,

it happened with another VM: 

# virsh snapshot-create-as --domain rasa sn1 --diskspec
 vda,file=/var/lib/libvirt/images/rasa-sn1.qcow2 --disk-only
 --atomic --no-metadata

# virsh blockcommit rasa vda --active --verbose --pivot
Block commit: [100 %]error: failed to pivot job for disk vda
error: block copy still active: disk 'vda' not ready for pivot yet

# virsh domblklist rasa
Target     Source
------------------------------------------------
vda        /var/lib/libvirt/images/rasa-sn1.qcow2

If blockcommit had succeeded, it would be now:
vda        /var/lib/libvirt/images/rasa.qcow2

Now both files rasa.qcow2 and rasa-sn1.qcow2 are written to, and
# virsh blockjob rasa vda
Active Block Commit: [100 %]

But trying to virsh blockcommit rasa vda --active --verbose --pivot once more:
error: block copy still active: disk 'vda' already in active block job

How do I make rasa.qcow2 the only active vda?

I use qemu-kvm-ev-2.3.0-29.1.el7.

Thanks,
Nerijus

Nerijus Baliunas <nerijus@...> writes:
> But trying to virsh blockcommit rasa vda --active --verbose --pivot once 
more:
> error: block copy still active: disk 'vda' already in active block
job
> 
> How do I make rasa.qcow2 the only active vda?
"virsh blockjob rasa vda --abort" aborts the blockcommit and then I
can try
to blockcommit again:
# virsh blockjob rasa vda --abort

# virsh blockcommit rasa vda --active --verbose --pivot
Block commit: [100 %]error: failed to pivot job for disk vda
error: block copy still active: disk 'vda' not ready for pivot yet

But it does not succeed. I tried more than 20 times.
libvirt-1.2.17-5.el7.x86_64

If I shutdown VM after unsuccessful blockcommit command, I can delete 
snapshot file, edit xml and VM starts OK, but if I shutdown after blockjob 
abort command, the VM disk is unclean if I start VM without snapshot file.

I found the bug - https://bugzilla.redhat.com/show_bug.cgi?id=1197592
It seems it is still unfixed.

Regards,
Nerijus

Nerijus Baliunas <nerijus@...> writes:
> I found the bug - https://bugzilla.redhat.com/show_bug.cgi?id=1197592
> It seems it is still unfixed.
blockcommit completes successfully if I change virtual disk Cache mode from
Hypervisor default to none.

Regards,
Nerijus