VSS timeouts on Hyper-V guest, Exchange Replication Service, CU5

I'm having a problem with a Hyper-V guest that is running Exchange 2013 CU5.  I will say I have had issues with this VM since installing CU5.
Note:  I am doing a backup from within the VM guest, not from the host.
The scheduled backup takes a long time to complete, an entire weekend to backup 150GB to an ISCSI disk.  In addition the CPU time is very high (58%) while this is happening.  Attempting to open the backup manager window consistently makes the CPU
time hit 99%.  When this happens Outlook clients will fail.  When backup manager opens it will continually say "Reading data; please wait..."  If the backup manager happened to already been open, the backup job will say "Volume
1 0% of 4 volumes."
The processes taking up the CPU time are Microsoft Volume Shadow Copy Service  (24%), Microsoft Block level backup service (62%) and virtual disk service (12%).  Memory use always hovers around 65%.  If I attempt to kill the processes with
task manager, there is no change.  If I use the kill executable it will say the process is not running.  I cannot stop the corresponding service either.  I cannot stop the backup.  I cannot query vss writer status.  I cannot restart
the ISCSI service (device in use.)  Restarting the NAS that contains the ISCSI target does nothing.  The only recourse is to restart the server.
If I restart the server and start a backup fairly soon after, the backup completes normally, in about an hour.  During a normal backup CPU usage is at about 30%.  The Microsoft Volume Shadow Copy Service runs at 0% CPU time as well as the virtual
disk service.  The Microsoft Block Level Backup Engine runs at 10% CPU time.  The scheduled backup is set to start at 9:30pm.  I have also tried changing backup times.  If I restart the server at 4 am and do not run a manual backup, the
scheduled backup performs poorly.
After some digging I find these errors:
Log Name:      Application
Source:        MSExchangeRepl
Date:          10/14/2014 9:30:41 PM
Event ID:      2112
Task Category: Exchange VSS Writer
Level:         Error
Keywords:      Classic
User:          N/A
Description:
The Microsoft Exchange Replication service VSS Writer instance 7a465f3f-25ba-45b2-952a-870a6ddc2f2b failed with error code 80070020 when preparing for a backup of database 'Mailbox Database 2123847568'.
Log Name:      Application
Source:        VSS
Date:          10/14/2014 9:30:41 PM
Event ID:      8229
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Description:
A VSS writer has rejected an event with error 0x00000000, The operation completed successfully.
. Changes that the writer made to the writer components while handling the event will not be available to the requester. Check the event log for related events from the application hosting the VSS writer. 
Operation:
   PrepareForBackup event
Context:
   Execution Context: Writer
   Writer Class Id: {7e47b561-971a-46e6-96b9-696eeaa53b2a}
   Writer Name: MSMQ Writer (MSMQ)
   Writer Instance Name: MSMQ Writer (MSMQ)
   Writer Instance ID: {b8ae6140-7fcb-427d-9493-e070221f752f}
   Command Line: C:\Windows\system32\mqsvc.exe
   Process ID: 1676
Log Name:      Application
Source:        MSExchangeRepl
Date:          10/14/2014 9:30:41 PM
Event ID:      2024
Task Category: Exchange VSS Writer
Level:         Error
Keywords:      Classic
User:          N/A
Description:
The Microsoft Exchange Replication service VSS Writer (Instance 7a465f3f-25ba-45b2-952a-870a6ddc2f2b) failed with error 80070020 when preparing for a backup.
As you can see the errors happen almost immediately after the backup starts.
In addition the following VSSwriters show a last error "timed out"
Microsoft Exchange Writer
Com+ RegDB Writer
Shadow Copy Optimization Writer
Registry Writer
I will add also the following issues I have been experiencing ever since installing CU5:
1 Version buckets threshold easy reached.  Had to modify threshold and set limits on email size. Sometimes still happens.
2 After a restart of the server, the server may have no, or limited connection to the network.  It may or may not have an exclamation point on the network icon.  If there is no exclamation point, it can ping other network resources, but inbound requests
and pings, will fail.  The event log shows that the network should be available while booting, but it's not since it cannot communicate with active directory.  The fix for this is to disable/enable the network adapter and then all is well.
I really need some help figuring this out.  Again, never had an issue with this server prior to Exchange 2013 CU5 being installed.

Hi,
The reason I think it is Exchange related, is that from the error message it mentioned:
A VSS writer has rejected an event with error 0x00000000
And then it indicated it is "Microsoft Exchange Replication service VSS Writer". 
The Microsoft Exchange Replication service VSS Writer (Instance 7a465f3f-25ba-45b2-952a-870a6ddc2f2b) failed with error 80070020 when preparing for a backup
Later I found this article:
How to turn on the Exchange writer for the Volume Shadow Copy service in Windows Small Business Server 2003
http://support2.microsoft.com/kb/838183/en-us
It mentioned that with turned on Exchange writer, we will fail to do system state backup and Exchange backup at a same time:
The Exchange writer may cause conflicts with the information store backup feature of the Backup utility. The information store backup feature uses online streaming to back up the Exchange databases. If the Exchange writer is registered, the Backup utility
may log errors if you try to back up the system state and the Exchange information store at the same time. (For example, the Backup utility may log Event ID 8019.)
In order to confirm if it is the cause, please test to:
1. Create a backup-once task to backup only a simple file - this is a quick test to confirm if Windows Server Backup is fine or not.
2. A second backup-once task to do a system state backup without any exchange related information.
3. If both failed, please test to disable Exchange Writer and redo test 1&2.
It will take us some time on doing these tests. The reason is to figure out if it is Exchange related or not. I'll continue discuss with you if any new clue is found. 
If you have any feedback on our support, please send to [email protected]

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    Hi Julez K,
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    http://www.symantec.com/business/support/index?page=content&id=TECH209938
    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety,
    or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
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        Lid: 27962   ROP: ropExtendedError [250]
        Lid: 1494    ---- Remote Context Beg ----
        Lid: 26426   ROP: ropLogon [254]
        Lid: 22086 
        Lid: 27206 
        Lid: 17990 
        Lid: 16966   StoreEc: 0x8004010F
        Lid: 31433   StoreEc: 0x8004010F
        Lid: 8620    StoreEc: 0x3EB    
        Lid: 1750    ---- Remote Context End ----
        Lid: 26849 
        Lid: 21817   ROP Failure: 0x3EB    
        Lid: 26297 
        Lid: 16585   StoreEc: 0x3EB    
        Lid: 32441 
        Lid: 1706    StoreEc: 0x3EB    
        Lid: 24761 
        Lid: 20665   StoreEc: 0x3EB    
        Lid: 25785 
        Lid: 29881   StoreEc: 0x3EB     </Data>
      </EventData>
    </Event>

    Hi
    This error occurs because the MailboxReplicationService (MRS) currently caches Mailbox Database information past the lifetime of some databases. 
    Restarting the service will clear the cache.
    Maybe it is the simplest way to solve it.
    If it doesn’t work, you can try cmd to check it.
    Get-MailboxDatabase : Can you find the database which you delete?
    Remove-MailboxDatabase -Identity "MyDatabase": You can try to delete database if you can see the database.

  • The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error. Event 1121

    Hello all,
    We migrated our Exchange server from 2003 to 2010. After the mailbox move requests were finished we had one that was stuck. We basically skipped it as we had a lot of other things to finish over the weekend. Here we are a year later, the old exchange server
    is gone and so is an old DC. I am receiving an error every four minutes in event viewer.
    The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error.
    Request GUID: '3e46b7cb-2ac0-42c1-98e8-57517a19ee40' 
    Database GUID: '5c6c573b-4f45-4ce3-b296-11cf69c2e2b6'
    Error: Unable to find 'OLD Domain Controller' computer information in domain controller 'OLD Domain Controller' to perform the suitability check. Verify the fully qualified domain name..
    I have checked in EMC for move requests. None are listed. I have checked the DCs listed in EMC properties. Old DC is not listed.
    I also ran these commands in shell to attempt to cancel the stuck request.
    Get-MoveRequest -MoveStatus Completed;Pending;InProgress;Failed;CompletedWithWarning;Suspended;Queued;CompletionWithProgress : Remove-MoveRequest
    NO changes. Still throwing error. Any suggestions? I also tried using the guid and shell to look at the move request. Systems replies no such request.

    Hello,
    Please try to restart iis services to check the result.
    If the issue persists, I recommend you ping you DC server on your exchange server to check if your exchange server can communicate with your DC server.
    If there are other DCs, please try to use set-adserversettings cmdlet to specify a DC for your exchange server.
    Set-AdServerSettings
    http://technet.microsoft.com/en-us/library/dd298063(v=exchg.150).aspx
    Besides, please install the lasted rollup to check the result.
    Cara Chen
    TechNet Community Support

  • The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error. : Error: An Active Directory Constraint Violation error occurred

    Hello,
    We have a multi domain parent child AD domain infrastructure and now we upgraded our exchange from Exchange 2007 to Exchange 2013. Since last few days, we see the below error on the mailbox server event viewer.
    EVENT ID : 1121
    The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error. 
    Request GUID: '93a7d1ca-68a1-4cd9-9edb-a4ce2f7bb4cd' 
    Database GUID: '83d028ec-439d-4904-a0e4-1d3bc0f58809' 
    Error: An Active Directory Constraint Violation error occurred on <domain controller FQDN>. Additional information: The name reference is invalid. 
    This may be caused by replication latency between Active Directory domain controllers. 
    Active directory response: 000020B5: AtrErr: DSID-0315286E, #1:
    Our Exchange setup is in parent domain, but we keep on getting this error for various domain controllers in each child domain in the same site. We then configured one of the parent domain domain controller on Exchange. Still we are getting this error for
    the configured parent domain DC.
    Verified the AD replication and there is no latency or pending stuffs.
    Any support  to resolve this issue will be highly appreciated. Thank you in advance.
    Regards,
    Jnana R Dash

    Hi,
    In addition to Ed's suggestion, I would like to clarify the following things for troubleshooting:
    1. Please restart IIS at first.
    2. If the issue persists, please ping your DC on your Exchange server to check if Exchange can communicate with DC.
    Hope it helps.
    Best regards,
    Amy Wang
    TechNet Community Support

  • The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error

    Since demoting a child domain a few days ago, Exchange 2013 is still trying to contact it and as a result generating errors in the application event logs.  I had a similar problem which I solved by removing some old migration batches, now I have a problem
    with the Microsoft Exchange Mailbox Replication service.
    The event logged is:
    The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error.
    Request GUID: '0b6c0f5a-0563-48e2-8b97-e0781c6cc69a' 
    Database GUID: '23258311-ad29-41c2-a842-522f48baa267'
    Error: Unable to read from Active Directory. --> The call to Microsoft Exchange Active Directory Topology service on server 'TopologyClientTcpEndpoint (localhost)' returned an error. Error details Unable to find a suitable directory server for
    domain 'admin.riddlesdown.local'.. --> Unable to find a suitable directory server for domain 'admin.riddlesdown.local'..
    Process Microsoft.Exchange.Directory.TopologyService.exe (PID=2280). Exchange Active Directory Provider could not find an available domain controller in domain admin.riddlesdown.local. This event may be caused by network connectivity issues or
    configured incorrectly DNS server.
    The domain doesn't exist in AD Sites and Services, I have removed all traces from DNS but this is still occurring.  When I run Get-ADServerSettings | fl it reports no trace of the domain or a DC that was previously in it.
    How can I stop these events occurring and is it likely to be causing something else not to work correctly.
    We are running Exchange 2013 CU1

    No, that didn't work.  Here are more details:
    Source: MSExchange ADAccess (EventID: 2130)
    Process Microsoft.Exchange.Directory.TopologyService.exe (PID=2280). Exchange Active Directory Provider could not find an available domain controller in domain admin.riddlesdown.local. This event may be caused by network connectivity issues or configured
    incorrectly DNS server.
    Source: MSExchange ADAccess (EventID: 2119)
    Process Microsoft.Exchange.Directory.TopologyService.exe (PID=2280). Error DNS_ERROR_RCODE_NAME_ERROR (0x8007232B) occurred when DNS was queried for the service location (SRV) resource record used to locate a domain controller for domain admin.riddlesdown.local
     The query was for the SRV record for _ldap._tcp.dc._msdcs.admin.riddlesdown.local
     Common causes of this error include the following:
     - The DNS SRV records required to locate a domain controller for the domain are not registered in DNS. These records are registered with a DNS server automatically when a domain controller is added to a domain. They are updated by the domain controller
    at set intervals. This computer is configured to use DNS servers with following IP addresses:
    10.59.100.7
    10.59.100.8
    fec0:0:0:ffff::1Microsoft.Exchange.Directory.TopologyService.exe
    fec0:0:0:ffff::2Microsoft.Exchange.Directory.TopologyService.exe
    fec0:0:0:ffff::3Microsoft.Exchange.Directory.TopologyService.exe
     - One or more of the following zones do not include delegation to its child zone:
    admin.riddlesdown.local
    riddlesdown.local
    local
    . (the root zone)
    Source: MSExchange Mailbox Replication Service (EventID: 1121)
    The Microsoft Exchange Mailbox Replication service was unable to process a request due to an unexpected error.
    Request GUID: '87f4b926-0621-43d3-afeb-fe475ee6d850' 
    Database GUID: '23258311-ad29-41c2-a842-522f48baa267'
    Error: Unable to read from Active Directory. --> The call to Microsoft Exchange Active Directory Topology service on server 'TopologyClientTcpEndpoint (localhost)' returned an error. Error details Unable to find a suitable directory server for domain 'admin.riddlesdown.local'..
    --> Unable to find a suitable directory server for domain 'admin.riddlesdown.local'..
    Something is cause the Exchange server to go looking for our old domain, but what and why?

  • Router cannot see Hyper-V Guest MAC address

    Greeting,
    I have been trying to build a server on Hyper-V, on a host running Windows Server 2012 R2, and a wireless adapter is used.
    A virtual switch was created as external, connected to the host's wireless adapter.
    The guest OS is Debian 7, and the problem is it's unable to use DHCP to connect to the internet.
    I have to manually specific an IP address and the subnet mask in order to access the internet in the Guest OS, say 192.168.0.50. And I set port forward to this IP for external connection to the guest, but then sometimes I cannot connect; without doing anything
    it restores the connection after a while. At the same time I am keeping the MSRDP connection to tthe host so the host has not lost connecting to the internet.
    When the server on Guest is not accessible from the web, I can still connect to the server within the host machine by typing the lan IP of the guest: 192.168.0.50
    On checking the router, I found that two IP address 192.168.0.50 (Guest OS) and 192.168.0.15 (Host) are sharing the same MAC address (of the wireless card). It means the MAC address of the Guest OS is not seen by the router, and I suppose this is the root
    for the instability.
    Would you have any ideas about the situation, and suggested solution?
    Thank you.

    An update to my issue:
    Just realized the possible cause: the (freaking) router is dropping inactive machine.
    Basically the DHCP issue is not solved, but it doesn't seem to be a cause after all, as long as I manually assign the IP it works, even having the  2 IPs with the same MAC on the ARP table on router. (Host connection drop has to be further investigated).
    As I found that the loss of connection actually happens after a while I don't touch the web server on VM, the longer I leave it idle the more likely I cannot connect to it again. The situation is like a prolonged loading when trying to access a website,
    where sometimes you can connect after a while, or you never.
    What's weird is, if I somehow manage to connect to the idle VM server by multiple attempts, and that after I have restored the connection, I can reconnect to the server from another computer very quickly without any significant loading time.
    On some quick searches, I found someone using Linksys router is suffering from a similar situation as I do:
    http://serverfault.com/questions/522448/application-request-routing-on-a-hyper-v-guest-intermittently-stops
    So what I can try are basically 3 ways 
    -Change the router, not viable as I don't own it.
    -Insert a wireless bridge in between
    -Do something with Debian, making it periodically generate network request to the internet to keep the connection alive
    Any ideas about my observation, and maybe possible solutions?
    Thank you for reading.

  • Server 2012 r2 Hyper-v guest network speed with 10 GB NIC's

    Hi
    Setting up a Server 2012 r2 Hyper-v host with an onboard 4 port 1 GB nic and a offboard dual port 10 GB nic. We are using the 1gb quad port for management. The 10 Gb we intend using for hyper-v guest use however we don't seem to be able to achieve very high
    speeds though the 10 GB adapter when assigned to a virtual switch. Testing the 10 Gb nic from the host confirms that we can transfer/get 10 GB speeds. When assigned to a virtual switch however the speed drops to about 1-2 Gbps. Has anybody seen anything like
    this ?. We've tried a variety of settings and i can confirm that the network traffic is using the 10 GB nic.

    Hi,
    I am almost certain what you see is by design. I don't want to go into to much detail because I'm in a bit of a hurry. But allow me to explain.
    Suppose you have a 10Gb NIC interface and an multi-core CPU. When you have RSS (Receive-Side Scaling) disabled a single core can normally handing
    around 2.5-4.3Gbps. When you enable RSS the data streams/traffic is spread across multiple cores.
    But RSS is a network optimization feature for the Management OS, not for a vSwitch. Instead you should use VMQ (Virtual Machine Queuing). VMQ is
    the equilavant of RSS, but then intended for VMs. But... there is a difference. VMQ does not spread single data streams/traffic across multiple cores. Instead is (dynamically) assigns each vmNIC its own core. So... you don't use multiple-cores at a time for
    a single vmNIC. You can't use RSS and VMQ at the same time. Keep that in mind.
    But... you can accomplish this by enabling vRSS as well. That's another story.
    If you watch the following video, at the end you know all about VMQ.
    Hyper-V dVMQ
    http://www.hypervrockstar.com/tag/dvmq/
    Boudewijn Plomp | BPMi Infrastructure & Security
    This posting is provided "AS IS" with no warranties, and confers no rights. Please remember, if you see a post that helped you please click "Vote as Helpful", and if it answered your question, please click "Mark as Answer".

  • Backing up Hyper-V Guests on Windows 8/8.1 Hosts?

    Hi,
    is there any way to get DPM to backup Hyper-V Guests hosted on Win8 (or 8.1) machines? Requirement comes from developer workstations that have local VMs for sharepoint development. 
    Unfortunately, DPM doesn't seem to "see" the HV Component when trying to select a win8 machine as a server.
    Thanks, Martin

    DPM 2012 can protect ONLY files at Windows 8 (8.1).
    Support Matrix for DPM Protection
    Have a nice day !!!

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