Many organisations, taking SharePoint on for the first time, opt to go for a single server instance deployment of SharePoint. However, they find it easy to forget in the heat of getting a single SharePoint production environment deployed, that without defining a fully available topology that one may be creating a single point of failure scenario.
You may come across this error when attempting to carry out a PSConfig upgrade using office2010-kb2597014-fullfile-x64-glb: An exception of type Microsoft.SharePoint.Administration.SPUpdatedConcurrencyException was thrown. Additional exception information: An update conflict has occurred, and you must re-try this action. The object SPUpgradeSession Name=Upgradexxxx was updated by Domain\UserID, in the PSCONFIG (xxxx) process, on machine SharePointServer01. View the tracing log for more information about the conflict.
