When applying a Cumulative Update to your SharePoint 2016 Farm, you might run into troubles when executing PSConfig/PSConfigUI after installing the Binaries. The error that is logged in the Windows Event Log looks as follows:
The Execute method of job definition Microsoft.SharePoint.Administration.SPUpgradeJobDefinition (ID ..) threw an exception. More information is included below.
The upgraded database schema doesn’t match the TargetSchema. (Correlation=..)
You can avoid this issue if you either
- dismount all the Content Databases before executing PSConfig/PSConfigUI (which is a good idea in larger environments anyway) and upgrade them later in a second step or
- upgrade all the Content Databases before executing PSConfig/PSConfigUI with something like Get-SPContentDatabase | Upgrade-SPContentDatabase. You could speed up this process by using multiple PowerShell Sessions or even multiple SharePoint Servers.
With detached or already upgraded Content Databases PSConfig/PSConfigUI should run successfully.