[ovirt-users] vmware import hangs after click load button on 3.5 rc5

Wed Sep 23 18:14:33 UTC 2015

On Wed, Sep 23, 2015 at 8:26 PM, Nir Soffer <nsoffer at redhat.com> wrote:

> On Wed, Sep 23, 2015 at 8:21 PM, Nir Soffer <nsoffer at redhat.com> wrote:
>
>> On Wed, Sep 23, 2015 at 12:40 PM, Ian Fraser <Ian.Fraser at asm.org.uk>
>> wrote:
>>
>>> Hi Nir,
>>>
>>> I have changed the v2v.py file as per your request, it has now changed
>>> the behaviour. The popup window still hangs and I get the following two
>>> events:
>>>
>>> Failed to retrieve VMs information from external server
>>> vpx://username%40domain@vcenter.server
>>> /datacentre_name/hostname?no_verify=1
>>>
>>> VDSM ovirt-host-02 command failed: internal error: Invalid or not yet
>>> handled value 'emptyBackingString' for VMX entry 'ide1:0.fileName' for
>>> device type 'cdrom-image'
>>>
>>
>> Fixing the first error, we see now the real error; libvirt cannot handle
>> this vm configuration. We will ask one of the libvirt guys to look into
>> this.
>>
>
In vdsm.log, we see that one vm was parsed successfully (it failed when
geting disk info):

Thread-1076::ERROR::2015-09-23
10:18:51,778::v2v::682::root::(_add_disk_info) Error getting disk size
Traceback (most recent call last):
  File "/usr/share/vdsm/v2v.py", line 679, in _add_disk_info
    vol = conn.storageVolLookupByPath(disk['alias'])
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 4308, in
storageVolLookupByPath
    if ret is None:raise libvirtError('virStorageVolLookupByPath() failed',
conn=self)
libvirtError: An error occurred, but the cause is unknown

Little later, libvirt failed to return the xml for another vm:

Thread-1076::ERROR::2015-09-23
10:18:52,604::__init__::526::jsonrpc.JsonRpcServer::(_serveRequest)
Internal server error
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 521,
in _serveRequest
    res = method(**params)
  File "/usr/share/vdsm/rpc/Bridge.py", line 273, in _dynamicMethod
    result = fn(*methodArgs)
  File "/usr/share/vdsm/API.py", line 1436, in getExternalVMs
    return v2v.get_external_vms(uri, username, password)
  File "/usr/share/vdsm/v2v.py", line 152, in get_external_vms
    root = ET.fromstring(vm.XMLDesc(0))
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 478, in XMLDesc
    if ret is None: raise libvirtError ('virDomainGetXMLDesc() failed',
dom=self)
libvirtError: internal error: Invalid or not yet handled value
'emptyBackingString' for VMX entry 'ide1:0.fileName' for device type
'cdrom-image'

It is possible that the failing vm was the one you want to import, but it
is also possible that the vm you want to import was fine.

The following patch improve error handling, so we are not aborting the
entire request if libvirt fail to return the domain xml for one of the vms.
https://gerrit.ovirt.org/46634/

Please test the patch and report if it works for you.

Nir

>> You may try to disable the cdrom device on that vm, which is probably
>> useless now.
>>
>>
>>>
>>> I have attached the vdsm.log to this email, should I also attach to the
>>> BZ I opened?
>>
>>
>> Yes, please attach it.
>>
>
> Hmm, this is a new issue, as the original issue is solved by the patch.
>
> Please open a new bug for the libvirt error:
>
> internal error: Invalid or not yet handled value 'emptyBackingString' for
> VMX entry 'ide1:0.fileName' for device type 'cdrom-image'
>
> Thanks,
> Nir
>
>
>>
>> (Adding back users at ovirt.org, since this thread may help others with
>> same issue.)
>>
>>
>>>
>>> Many thanks
>>>
>>> Ian
>>>
>>> From: Nir Soffer [mailto:nsoffer at redhat.com]
>>> Sent: 23 September 2015 00:04
>>> To: Ian Fraser <Ian.Fraser at asm.org.uk>; Shahar Havivi <
>>> shavivi at redhat.com>
>>> Cc: users at ovirt.org
>>> Subject: Re: [ovirt-users] vmware import hangs after click load button
>>> on 3.5 rc5
>>>
>>> Hi Ian,
>>>
>>> Your import failed because looking up some disk failed. Unfortunately,
>>> we don't have enough information in the log abut this failure.
>>>
>>> Because of incorrect error handling, this error failed the entire
>>> request, failing your import.
>>>
>>> Patch [1] fixes the second problem. If is possible that with this patch
>>> listing the external vms will work and you will be able to import the vm,
>>> but it is also possible that the first error was significant and will fail
>>> the import later.
>>>
>>> It would be useful if you test this patch and report if it works for you.
>>>
>>> Would you open an ovirt bug for this issue, attaching the vdsm log?
>>>
>>> [1] https://gerrit.ovirt.org/46540
>>>
>>> Nir
>>>
>>> On Tue, Sep 22, 2015 at 9:09 AM, Ian Fraser <Ian.Fraser at asm.org.uk>
>>> wrote:
>>> Thanks Nir,
>>>
>>> File attached.
>>>
>>> From: Nir Soffer [mailto:nsoffer at redhat.com]
>>> Sent: 21 September 2015 23:16
>>> To: Ian Fraser <Ian.Fraser at asm.org.uk>
>>> Cc: users at ovirt.org
>>> Subject: Re: [ovirt-users] vmware import hangs after click load button
>>> on 3.5 rc5
>>>
>>> On Tue, Sep 22, 2015 at 12:14 AM, Ian Fraser <Ian.Fraser at asm.org.uk>
>>> wrote:
>>> I did get a “VDSM <hostname> command failed: local variable 'capacity'
>>> referenced before assignment” error in the events I have just noticed, does
>>> that shed any more light?
>>>
>>> This shed some light. Can you share the vdsm.log containing this error?
>>>
>>> Look in /var/log/vdsm/vdsm.log*
>>>
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>>
>>
>
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