Discussions specific to the Microsoft Hyper-V hypervisor
rskinner
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Issue with Windows Server 2012 R2 Update (April 2014 rollup)

Post by rskinner » Apr 04, 2014 1:44 pm 3 people like this post

Having installed the recently released Windows Server 2012 R2 Update, AKA Windows 8.1 Update 1 KB 2919355, my Veeam Hyper-V backups failed with errors as shown below.

Code: Select all

03/04/2014 20:58:28 :: Processing 'SERVERNAME' Error: Client error: The system cannot find the file specified.
Failed to open file [\\?\Volume{36db85be-bb6a-11e3-80ce-000af72f0333}\SERVERNAMEWINDOWS SERVER 2012 R2 STANDARD_DISK_1_117A5A0B-5976-4766-B256-3707A2D8CFA7-AutoRecovery.avhdx] in readonly mode.
The engineer (Anatoly) was excellent and was able to prove that the error wasn't related to Veeam by running Windows backup commands using PowerShell. Following the uninstall of KB 2919355, the only one of the six hot fixes comprising the Windows Server 2012 R2 Update listed in Add Remove Programs, I was able to run backups as before. If you're thinking of installing this update, ensure you test it well.

For reference the configuration is:

4x Hyper-V 2012 R2 hosts
Dell EqualLogic SAN 6.0.7
HIT Kit 4.7 EPA
Veeam Backup & Replication 7.0.0.839

m.novelli
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by m.novelli » Apr 04, 2014 8:37 pm

Any info if this bug raise only on Hyper-V hosts or also on backup/proxy servers? I've migrated many Veeam Backup servers to Windows 2012 R2 in the last months and they have Windows Updated active

Thanks!

Gostev
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Gostev » Apr 04, 2014 9:31 pm 1 person likes this post

Hi Marco, you are fine. This bug is specific to Hyper-V virtual machine backup from Hyper-V 2012 R2 (once the update is installed, Hyper-V starts to return a different path to one of the VM files). Thanks!

m.novelli
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by m.novelli » Apr 04, 2014 9:42 pm

:)

Susanb
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Susanb » Apr 04, 2014 9:46 pm

Are you guys working with Microsoft to resolve this? This update has to be installed otherwise these servers won't get future security updates starting in May. We have 30 days to deploy that patch.

If you don't have contacts with Microsoft, let me know. There's a time sensitivity to this update.

m.novelli
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by m.novelli » Apr 04, 2014 9:59 pm

Don't worry, Veeam has strict partnership with Microsoft and is super fast in hotfix release (Veeam, not Microsoft) :)

BTW we should speak about a workaround, not an hotfix, because the bug has been introduced by Microsoft and not by Veeam

JRH
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by JRH » Apr 05, 2014 8:58 am

Hi,

Just to add that we have the same issue on our 2012 R2 cluster (with the new updates) and currently have a support ticket open with Veeam.

Has anyone had any update or ETA from Microsoft?

rskinner
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by rskinner » Apr 05, 2014 11:45 am

I haven't opened a call with MS. The problem is that I've had to put the cluster into production, so I can no longer carry out testing etc.

JRH - what storage are you using? I'm just wondering if it's related to the Dell EqualLogic VSS provider.

Gostev
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Gostev » Apr 05, 2014 12:34 pm 4 people like this post

All, our devs worked on Saturday to produce the hot fix. We will now need a couple of days for full regressive testing, and thus are hoping to make it available by the Patch Tuesday next week (which is when this will hit Windows Update). Thanks!

JRH
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by JRH » Apr 05, 2014 4:15 pm

Hi,

It's not an EqualLogic issue as I'm running a Nimble SAN with a software VSS - I've had to uninstall the windows update, but now have working backups again, hopefully Veeam release the fix soon and I will reinstall the windows update.

Susanb
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Susanb » Apr 07, 2014 2:02 am 1 person likes this post

Kudos to the Veeam folks for being very responsive to this issue.

Shralok
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Shralok » Apr 07, 2014 5:11 pm

This thread was a great find. I will be holding off on this KB 2919355 until there is a resolution for Veeam. Thanks to all, especially devs for working on Saturday :mrgreen:

Gostev
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Gostev » Apr 07, 2014 9:55 pm

QC has signed off the hot fix for distribution, so you should be able to obtain it through support at this time, and I am sure they will create a KB article tomorrow. Thanks!

kasacompanies
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by kasacompanies » Apr 09, 2014 5:22 pm

Can I get a link to the KB article? I can't seem to find it. Thanks

Vitaliy S.
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Re: Issue with Windows Server 2012 R2 Update KB 2919355

Post by Vitaliy S. » Apr 09, 2014 8:15 pm

There is no KB yet, I believe our support team is still working on it. If you want to get the hotfix, then contact our technical team directly for now.

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