[libvirt-users] Block Commit: [100 %]error: failed to pivot job for disk vda

[Eric Blake]

On 01/07/2015 07:19 AM, Thomas Stein wrote:
> Hello.
> 
> I'm seeing this error while doing a backup of a VM.
> 
> + virsh blockcommit kaltura vda --active --verbose --pivot
> Block Commit: [100 %]error: failed to pivot job for disk vda
> error: internal error: unable to execute QEMU command
> 'block-job-complete': The active block job for device
> 'drive-virtio-disk0' cannot be completed

Based on this message, it is qemu that is refusing to do the pivot, but
I don't know if that is because of permissions on the destination file,
or something else (that is, it may still be a libvirt bug for not
putting things in the right state for the qemu command to have a chance
of succeeding).  What distro are you using?  Is AppArmor or SELinux at
play, where temporarily getting that out of the way might change things?

> 
> I'm on qemu 2.2.0 and libvirt-1.2.11.
> 
> Does someone else see this error? Libvirt.log says:
> 
> 2015-01-07 11:18:07.000+0000: 19355: warning :
> qemuDomainObjBeginJobInternal:1381 : Cannot start job (query, none) for
> domain kaltura; current job is (modify, none) owned by (19357, 0)
> 2015-01-07 11:18:07.000+0000: 19355: error :
> qemuDomainObjBeginJobInternal:1386 : Timed out during operation: cannot
> acquire state change lock

This may also be the sign of a libvirt bug in not tracking lock states
correctly.  I've had other reports of bogus behavior, so I'm trying to
take another audit of the code this week to see if I can find a problem
in the libvirt code.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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