title: SQL Server 2019 Logs - Polybase
body: <p>I have a windows SQL Server 2019 RTM-CU8 Enterprise edition instance.
  On restart, the logs report missing a registry key for Polybase, which was never installed and the services do not exist. Grateful for advice on suppressing this alert.
  Example message:
  Unable to retrieve registry value 'NodeRole' from Windows registry key 'Software\Microsoft\Microsoft SQL Server\MSSQL15.DW\Polybase\Configuration': (null).
  SQL SERVERPROPERTY ('IsPolyBaseInstalled') shows that it is not installed.
  Thank you.
  Chris</p>