I had several MOSS 2007 Farm restorations in my test environments. Each time after a restoration SharePoint’CPU goes up to 100% and a lot of errors (6483, 6398, 7076) appear in the Application event log.
The Execute method of job definition Microsoft.Office.Server.Administration.ApplicationServerAdministrationServiceJob (ID 538459ed-46a7-47e5-ba80-2a7120c36336) threw an exception. More information is included below. Value cannot be null. Parameter name: userName
It looks like it is the SharePoint Farm restoration process bug. This restoration does not restore ProcessIdenty information for SharedServices provider.
Run the following command, to be sure that we are talking about the same issue: stsadm -o execadmsvcjobs
It should fail.
Run the folowing command after restoration, to fix your farm :
stsadm -o editssp -title SharedServices1 -ssplogin “NT AUTHORITY\NETWORK SERVICE”
stsadm -o editssp -title SharedServices1 -ssplogin “DOMAIN\ACCOUNT” -ssppassword ****
First command is suitable for the SingleServer installation.
Run the following command, to be sure that we have fixed the issue: stsadm -o execadmsvcjobs
It should succeed.