Agent is offline after unable to establish Hyper-V WMI connection (4039197)

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Title

Agent is offline after unable to establish Hyper-V WMI connection
Description
Preconditions:
1. Core and Agent are installed.
2. Agent protected by Core as a single machine.
Possible steps to reproduce:
1. Go to agent server, delete 'v2' namespace from WMI repository ( in PowerShell: gwmi -Namespace root\virtualization -class __Namespace -Filter "name = 'v2'" | rwmi )
2. Go to Core UI -> agent summary tab (wait for issue, it can take a few days to reproduce)
Actual result:
Some actions and metadata are unavailable because machine is unreachable.
From agent logs:
ERROR 2018-02-12T07:04:06 [15] - Replay.Common.Implementation.WmiApi.Wmi ()
Invalid WMI namespace: root\virtualization\v2
System.Management.ManagementException depth 0: Invalid namespace (0x80131501)
at System.Management.ManagementException.ThrowWithExtendedInfo(ManagementStatus errorCode) +0x3f 600008c
at System.Management.ManagementScope.InitializeGuts(Object o) +0x118 600025c
at System.Management.ManagementScope.Initialize() +0x52 600025b
at Replay.Common.Implementation.WmiApi.Wmi.Connect() +0xb 60020f4
WARN 2018-02-12T07:04:06 [15] - Replay.Agent.Implementation.HyperV.Metadata.HyperVMetadataService ()
Unable to establish Hyper-V WMI connection
Replay.Common.Contracts.WmiApi.WmiException depth 0: Invalid WMI namespace: root\virtualization\v2 (0x80131500) ---> System.Management.ManagementException depth 1: Invalid namespace (0x80131501)

Expected result:
Metadata is available.
Cause

This issue have been identified by the application developers as RR-106748.
This issue is related to corrupted WMI repository on agent side, which is considered an environmental issue.
Resolution
Our development team has created a patch to permanently fix this problem. Please open a case with technical support to retrieve this patch.

Workaround:
- Rebuild the WMI repository on agent server using the steps provided by Microsoft on this Article.
Defect ID

RR-106748

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Agent is offline after unable to establish Hyper-V WMI connection (4039197)

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