SSP provisioning failed - Error User cannot be found

Issue :

Unable to create new SSP.

Error: Shared Services Provider
Creation failed.

Reason: User cannot be found. Check
the event details.

 ULS logs, you can events like this.

03:34:13.46 OWSTIMER.EXE
(0x0878) 0x0CE0 Office Server Office Server Shared Services 8nmu Critical                     

An unexpected error occurred while refreshing the shared object manager cache.

Reason: Object reference not set to an instance of an object.

 Techinal Details: System.NullReferenceException: Object reference not set to an instance of an object. at
Microsoft.Office.Server.Administration.SharedResourceProviderStoreDependency.get_IsValid() at
Microsoft.Office.Server.Administration.SharedObjectManager.Refresh()

10/10/2013
03:34:26.74 OWSTIMER.EXE
(0x0878) 0x092C Office
Server Office Server Shared Services 7fxr Exception                 

 Microsoft.SharePoint.SPException: User cannot be found. at
Microsoft.SharePoint.Administration.SPSiteCollection.Add(SPContentDatabase
database, String siteUrl, String title, String description, UInt32 nLCID,
String webTemplate, String ownerLogin, String ownerName, String ownerEmail,
String secondaryContactLogin, String secondaryContactName, String
secondaryContactEmail, String quotaTemplate, String sscRootWebUrl, Boolean
useHostHeaderAsSiteName)

                at
Microsoft.SharePoint.Administration.SPSiteCollection.Add(String siteUrl, String
title, String description, UInt32 nLCID, String webTemplate, String ownerLogin,
String ownerName, String ownerEmail, String secondaryContactLogin, String
secondaryContactName, String secondaryContactEmail, Boolean
useHostHeaderAsSiteName)

                at
Microsoft.SharePoint.Administration.SPSiteCollection.Add(String siteUrl, String
title, String description, UInt32 nLCID, String webTemplate, String ownerLogin,
String ownerName, String ownerEmail, String secondaryContactLogin, String s

Cause:

SharePoint Central admin site collection administrator is invalid. SharePoint uses Central administration site collection account to perform certain tasks. If this account is invalid, you will see above failures
while performing site administration jobs.


  
Resolution:

Go to Central Admin -->Site Actions-->Site Setting-->Permissions-->Site Collection Administrators

Provide a valid domain user account for Central admin site collection administrator.

Alternately check the Site collection admins for the web
applications involved in SSP creation ie Mysite Web App, SSPAdmin site collection
web App etc.