Troubleshooting FIM: An update conflict has occurred, and you must re-try this
Problem Statement
Updating the FIM Portal, the installation fails and rolls back with no error message.
Troubleshooting Action
Since we have no error message displayed to the end-user, we needed to obtain a Windows Installer Log to identify the problem.
Error Message
CAQuietExec: An exception occurred while running Microsoft.IdentityManagement.SolutionPackUtility.exe: An update conflict has occurred, and you must re-try this action. The object SPWebConfigFileChanges Name=WebConfigChanges - ee77e9b1-fc77-45cd-9f5a-af3e04cdf478 Parent=SPWebApplication Name=SharePoint - 80 is being updated by ADNE\FIMSPADMIN, in the Microsoft.IdentityManagement.SolutionPackUtility process, on machine CBSBURLFIM01. View the tracing log for more information about the conflict.
Cause
SharePoint Configuration cache was corrupted