Today I have been totally defeated by this infamous 2012R2 error:
Server Manager could not start the task due to the following error: Failed to open the runspace pool. The Server Manager WinRM plug-in might be corrupted or missing.
I have repeatedly tried each of the solutions proposed here, here and here.
No luck. There is no single error in the event log. Of cause I can add-remove roles with Powershell or completely wipe this machine. Still I am looking for the normal solution to this simple problem.
Further testing have shown that my bug is repeatable. I have tested on virgin default fully updated Windows Server 2012 R2 Standard installation and was able to reproduce it. Problems start after this statement:
winrm invoke Restore http://schemas.microsoft.com/wbem/wsman/1/config/plugin @{}
Full details are below. Any ideas?
After domain controller upgrade from win2008 R2 to 2012R2 everything worked flawlessly.
[dcdiag /fix /q] showed nothing apart the error below.
Error happened in a few hours after upgrade (not immediately):
Source: Microsoft-Windows-WinRM
Event ID: 10155
Level: Error
Description:
The WSMan service failed to read configuration of the following plugin:
Microsoft.ServerManager.
The error received was -2144108144: %%-2144108144
The WS-Management service cannot process the request. Configuration for plugin: "Microsoft.ServerManager" is corrupted. This plugin needs to be reconfigured or deleted. Use the following command to delete a plugin configuration
winrm delete http://schemas.microsoft.com/wbem/wsman/1/config/plugin?Name=xyz
Or use the following command to restore default plugin configuration. Note that all external plugins will be unregistered during this restore operation.
winrm invoke Restore http://schemas.microsoft.com/wbem/wsman/1/config/plugin @{}.
User Action
Make sure this plugin configuration is valid.
I have run in the CMD window:
winrm invoke Restore http://schemas.microsoft.com/wbem/wsman/1/config/plugin @{}
Then after server reboot Server Manager stopped working correctly with the error mentioned in the 1st paragraph.
Config and Windows details are below.
PS C:\> winrm quickconfig
WinRM service is already running on this machine.
WinRM is already set up for remote management on this computer.
PS C:\> winrm enumerate winrm/config/listener
Listener
Address = *
Transport = HTTP
Port = 5985
Hostname
Enabled = true
URLPrefix = wsman
CertificateThumbprint
ListeningOn = 127.0.0.1, 192.168.30.6, ::1
PS C:\> (Get-WmiObject -class Win32_OperatingSystem).Caption
Microsoft Windows Server 2012 R2 Datacenter
PS C:\> [System.Environment]::OSVersion.Version
Major : 6
Minor : 3
Build : 9600
Revision : 0
MajorRevision : 0
MinorRevision : 0
It appears that WinRM/WSMAN configuration has to be reset to default values. Thanks to this post I have found where does it reside. So copying
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\WSMANregistry settings from the fresh Win 2012 R2 install to the problem machine eliminates this error.Just for the case these settings as of 17 Oct 2016 from fully updated fresh install Win 2012 R2 Standard (English) are below:
The Link below helped solved the problem without making edit to my registry http://www.lukebrowning.com/sysadmin/windows/windows-server-2012-winrm-corrupt-or-missing/
In case you have multiple network interfaces (IP addresses) on your server - the key part from the @jide jimoh's blog post is:
Make sure you run this command with elevated permissions.
All credits to jide jimoh.
And no need to mess with the registry.
Check GPO policy. Maybe Remote Shell Access is disable. If this settings is disable, you will be able to add role and feature.
In my case, nor adding 127.0.0.1 or scv /scannow fixed the issue.
I just disabled the Windows Firewall and the Server Manager worked as expected. I was able uninstall Role/features successfully with the Server Manager GUI in the affected server, I don´t know the reason at all. I enabled the Windows Firewall after completed the process.