After upgrading two Hyper-V 2016 S2D clusters with the 2018-06 updates: KB4132216 and KB4284833, Windows 2012 R2 guests running Exchange CU21 DAGs fail to backup.
Backlog shows that:
The first DAG member started having this issue after the upgrade of the first Hyper-V cluster.
The Second DAG member started having this issue after the upgrade of the second Hyper-V cluster.
Veeam reports the following error: Processing EXCH-MBX03 Error: Error code: 0x80041032 Cannot query class instance from enumerator object [WMI] Failed get next object in collection.
System events show: Log Name: System Source: Service Control Manager Date: 12.07.2018 19.54.35 Event ID: 7011
A timeout (30000 milliseconds) was reached while waiting for a transaction response from the VeeamVssSupport service.
VeaamGuestHelper log within the guest show the last log lines 30 seconds before:
12.07.2018 19:54:05 15720 Cleaning CRpcServer data.
12.07.2018 19:54:05 15720 INFO Clearing list of VSS snapshot jobs.
After the failure started, Veeam B&R has been upgraded to 9.5U3a and 2018-07 MS patches and Guests have received their 2018-07 patches.
The Hyper-V 2016 cluster has remained on 2018-06.
We have registered a Support case: ID# 3092339, but since this issue is pretty painful we are also looking to the community now.
Does anyone have a clue of what could be going on here?
Is there anyway of enabling more debugging on the veeam services on either guest interaction proxy, hyper-v hosts or guest?