Discussions specific to the Microsoft Hyper-V hypervisor
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Mike Resseler
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Re: 9.5 Hyper-V 2016 Known Issues

Post by Mike Resseler » Feb 21, 2017 7:27 am

Frank,

This is indeed not good. Did you also log a support call with MSFT. I'm certainly not saying we are perfect but imho this is something where our hands are tied. And the more people complain / report to MSFT, hopefully the faster we get a solution...

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Re: 9.5 Hyper-V 2016 Known Issues

Post by frankive » Feb 21, 2017 10:08 am

I will certainly open a case with MSFT.
How Critical is the Application aware Processing on a domain Controller?

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[MERGED] Error Code: 0x80042308 (! important !)

Post by Gwisdala » Feb 21, 2017 10:29 am

Hi everyone!

I must back up two virtual server. A server is backed up normally and the other I get following error:

Code: Select all

Failed to finalize guest processing: Microsoft Exchange transaction logs may not have been truncated. Error: Failed to take in-guest VSS snapshot COM error: Code: 0x80042308
Retrying snapshot creation attempt (Failed to process guest: server.domain.local)
Task has been rescheduled
Queued for processing at 20.02.2017 22:01:58
Unable to allocate processing resources. Error: Failed to take in-guest VSS snapshot COM error: Code: 0x80042308
I've read that that should be solved when an update is applied by Microsoft. But that is not the case.

Enough space is also available.

Does anyone have a solution?

Thanks!

Mike Resseler
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Re: 9.5 Hyper-V 2016 Known Issues

Post by Mike Resseler » Feb 21, 2017 10:30 am

Pretty critical in my book. Since AD is actually a running database, plus some other information that is only included in a system state backup of a machine, you need to get the VSS writers to do their work before the actual backup works. Otherwise you might end up with inconsistency.

There are users that don't mind this because they are running multiple DC's and in case they loose one they either build a new one (and let AD synch do its work) or restore a DC in non-authoritative way but I always prefer to have at least 2, application-aware backups of my DC's (depending how much you have obviously)

My 2 cents

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Re: 9.5 Hyper-V 2016 Known Issues

Post by frankive » Feb 21, 2017 12:16 pm

How about shutting down all vms for one hour each night. Do backup and program hyper-v to start them. Best solution for now? Exchange logs will not be truncated though..

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Re: 9.5 Hyper-V 2016 Known Issues

Post by Salm » Feb 21, 2017 12:40 pm

frankive wrote:Exchange logs will not be truncated though..
Exchange is not affected by this issue (at least not from what I've seen).

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Re: 9.5 Hyper-V 2016 Known Issues

Post by Mike Resseler » Feb 21, 2017 12:42 pm

I also have no reports that Exchange is affected by this. As I said, we know about the DC's and now you reported the TS / RDS server.
@Salm, what OS are you running for your virtual exchange on Windows server 2016 Hyper-V?

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Re: 9.5 Hyper-V 2016 Known Issues

Post by Salm » Feb 21, 2017 12:49 pm

Mike Resseler wrote:@Salm, what OS are you running for your virtual exchange on Windows server 2016 Hyper-V?
My own Exchange runs on 2012 R2 and Exchange 2016 RTM and CU3.

I have confirmed that backups with AAP work for Exchange 2013 and 2016 (latest CU) on Windows Server 2012 R2, provided KB3037623 is installed on the guest OS (this KB updates integration services).

If the KB has not yet been installed, the vss will fail with the following error
Failed to create VM recovery checkpoint (mode: Veeam application-aware processing) Details: Job failed (''). Error code: '32768'. Failed to create VM recovery snapshot, VM ID '064dac1c-9652-4378-a69c-fa3429ca32a9'.
Retrying snapshot creation attempt (Failed to create production checkpoint.)
The KB is unable to be properly installed if Exchange is already installed (OS will hang on reboot)

The following service must be disabled prior to KB installation
AD Topology.
These services should be set to manual :
Microsoft Exchange Diagnostics
Microsoft Exchange Transport
Microsoft Filtering Management Service
Microsoft Exchange Search Host Controller

The services should be set to Automatic after successful KB installation.

I do not have any information on 2008 R2 Guest OS or previous versions of Exchange.

Mike Resseler
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Re: 9.5 Hyper-V 2016 Known Issues

Post by Mike Resseler » Feb 21, 2017 12:53 pm

Thanks @salm,

Really appreciate this!

Mike

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Re: 9.5 Hyper-V 2016 Known Issues

Post by frankive » Feb 21, 2017 10:29 pm

Just mgirated 12 VMs for a customer to a new 2016 storage spaces direct 2-node cluster.
Same errors on all he Vms!

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Re: 9.5 Hyper-V 2016 Known Issues

Post by Salm » Feb 21, 2017 10:37 pm

Update your guests. It will correct the errors, except for Domain Controllers, which aren't fixed yet.

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Re: 9.5 Hyper-V 2016 Known Issues

Post by frankive » Feb 21, 2017 10:43 pm

with all windows updates? is there a specific windows update we could deploy manually?

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Re: 9.5 Hyper-V 2016 Known Issues

Post by Salm » Feb 21, 2017 10:44 pm

KB3037623

Beware of this KB on Exchange servers, it will break them.

See my post above.

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Re: 9.5 Hyper-V 2016 Known Issues

Post by frankive » Feb 22, 2017 4:43 pm

i can see the update for 2012 servers, but not 2012 R2, is this correct?

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Re: 9.5 Hyper-V 2016 Known Issues

Post by Salm » Feb 22, 2017 4:53 pm

Update should be present on 2012 R2 as well, but you may not see it if your updates are too far back, as there are some prerequisites.

Read the KB info to know which ones : https://support.microsoft.com/en-us/hel ... view-hosts

(Yes, it says technical preview but it also applies to RTM).

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