"Unable to enable the pool" error when enabling an HA pool in the SolarWinds Platform

• You have previously disabled the pool due to a server issue and need to re-enable it to re-establish the HA.
• HA Virtual Hostname Resource (HA.VirtualHostNameResource.solarwinds) is not running, and HA pool synchronization is failing between main and standby pollers.

When enabling the pool, an error displays:

Confirm the following:

The Database entries, registry, and service startup type status for the Main poller and the MPE standby are set correctly
The HA license is applied properly

mismatched version of SolarWinds Platform servers.

Recommendation:

Resolution 1: 

1. Disable HA in the command prompt
2. Check Service startup type on all servers:
   1. On the Preferred Active Servers: 
      Run Powershell Query: Get-Service -DisplayName solar* | Set-Service -StartupType Automatic
      This query sets all Solarwinds services to Automatic.
   2. On the Standby Servers: 
      Run Powershell Query: Get-Service -DisplayName solar* | Set-Service -StartupType Disabled
      1. Edit the following services manually:
         Module Engine: Manual
         High Availability: Automatic
         Agent: Automatic
3. Check the High Availability registry on the Active Main Poller and  Standby.
   1. Open the Registry Editor (regedit.exe)
   2. Navigate to:
   3. HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Solarwinds\HighAvailability
   4. Examine the InstallType and RunType values and double-click them to update (if necessary). Verify the following:
      1. On the active primary polling engine, both InstallType and RunType values must be MainPoller.
      2. On the Standby primary polling engine, both InstallType and RunType values must be MainPollerStandby.

      4. Restart SolarWinds services on the standby server, or if needed, reboot the server to clear any hung processes or communication issues.

Resolution 2:

Make sure that the pollers are running the same version of the SolarWinds Platform.