libvirt users - Jan 2015 - domain has active block job

Hi there,
I receive this error when I run nova image-create <VM name> <Vm
Sanpshot
name>:

Exception during message handling: block copy still active: domain has 
active block job

In libvirt log file I can see:
error : qemuDomainDefineXML:6312 : block copy still active: domain has 
active block job

Libvirt is 1.2.7 version, linux system is Debian Wheezy

Please, what does it mean ?

Regards
Fiorenza

-- 
Spazio Web S.r.l.
V. Dante, 10
13900 Biella
Tel.: +39 015 2431982
Fax.: +39 015 2522600
Numero d'Iscrizione al Registro Imprese presso CCIAA Biella, Cod.Fisc.e 
P.Iva: 02414430021
Iscriz. REA: BI - 188936 Cap. Soc.: €. 30.000 i.v.

On Tue, Jan 13, 2015 at 10:10:53AM +0100, Fiorenza Meini
wrote:
> Hi there,
> I receive this error when I run nova image-create <VM name> <Vm
Sanpshot
> name>:
Okay, you're talking in the context of OpenStack. 

You can also check the Nova compute.log for more contextual details of
why the operation failed.
> Exception during message handling: block copy still active: domain has
> active block job
> 
> In libvirt log file I can see:
> error : qemuDomainDefineXML:6312 : block copy still active: domain has
> active block job
> 
> Libvirt is 1.2.7 version, linux system is Debian Wheezy
> 
> Please, what does it mean ?
It means, according to libvirt, there's an unfinished `blockcopy` (Copy
a disk backing image chain to destination ) operation.

If you can find the associated libvirt guest name, you can try the
below maybe.

For the Nova libvirt guest that you're trying to create a snapshot of,
find the location of its current block device: 

    $ virsh domblklist instance-YYYYYYYYY

Then check if there are active block operaations for that disk:

    $ virsh blockjob instance-YYYYYYYYY /path/to/libvirt/disk/ --info

If there is any operation and if it is a test environment, you can
run the below to abort the block operation in progress:

    $ virsh blockjob instance-YYYYYYYYY /path/to/libvirt/disk/ --abort.

Please the man page of `virsh` for more details.

-- 
/kashyap

Il 13/01/2015 10:51, Kashyap Chamarthy ha scritto:
> On Tue, Jan 13, 2015 at 10:10:53AM +0100, Fiorenza Meini wrote:
>> Hi there,
>> I receive this error when I run nova image-create <VM name>
<Vm Sanpshot
>> name>:
>
> Okay, you're talking in the context of OpenStack.
>
> You can also check the Nova compute.log for more contextual details of
> why the operation failed.
>
>> Exception during message handling: block copy still active: domain has
>> active block job
>>
>> In libvirt log file I can see:
>> error : qemuDomainDefineXML:6312 : block copy still active: domain has
>> active block job
>>
>> Libvirt is 1.2.7 version, linux system is Debian Wheezy
>>
>> Please, what does it mean ?
>
> It means, according to libvirt, there's an unfinished `blockcopy` (Copy
> a disk backing image chain to destination ) operation.
>
> If you can find the associated libvirt guest name, you can try the
> below maybe.
>
> For the Nova libvirt guest that you're trying to create a snapshot of,
> find the location of its current block device:
>
>      $ virsh domblklist instance-YYYYYYYYY
>
> Then check if there are active block operaations for that disk:
>
>      $ virsh blockjob instance-YYYYYYYYY /path/to/libvirt/disk/ --info
>
> If there is any operation and if it is a test environment, you can
> run the below to abort the block operation in progress:
>
>      $ virsh blockjob instance-YYYYYYYYY /path/to/libvirt/disk/ --abort.
>
> Please the man page of `virsh` for more details.
>
Thank for your response, I'm quite new on libvirt...
1) virsh blockjob ... -info gave me an empyt list
2( virsh blockjob ... -abort gave me this error: error: Requested 
operation is not valid: another job on disk 'vda' is still being
ended....

..but what ?

I'm looking at the man page of virsh to find an useful option for me...

Regards
Fiorenza

-- 
Spazio Web S.r.l.
V. Dante, 10
13900 Biella
Tel.: +39 015 2431982
Fax.: +39 015 2522600
Numero d'Iscrizione al Registro Imprese presso CCIAA Biella, Cod.Fisc.e 
P.Iva: 02414430021
Iscriz. REA: BI - 188936 Cap. Soc.: €. 30.000 i.v.