Event ID - 502

Event Id502
SourceSharePoint Portal Administration Service
DescriptionAn exception occurred in the search synchronizer.
Event InformationThis information from some newsgroups may help you:
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Go to the SharePoint Portal Server Central Administration page: Server Configuration Configure Server Farm Account Settings. Re-enter the Configuration Database Administration Account and Default Content Access Account information here (even if youre sure you entered them correctly).After struggling for a week to resolve the issue, we happened to have resolved the problem as outlined below:
1. Reinstalled SQL SP4. This probably configures all the Services utilizing the Full Text Search feature of SQL Server.
2. Delete the previous indexes for the Portal site, using Catutil.exe tool.
Note: If more than one Portal site is created on the SPS Server, delete the indexes for those Portal sites too using Catutil.exe tool.
3. Navigate to Manage Search Service under Component Configuration section located in SharePoint Portal Server Central Administration
4. Click on the <server name> link under Servers and Topology section
5. Accept the default values (or change the values as per your configuration) and Click OK.
6. Navigate to the Configure search and indexing screen under Site Settings of the Portal Site, where Search is not working, and do a Full update of the Portal and Non Portal content to update the indexes. Do not do an Incremental update as the indexes are not yet built.
Reference LinksEvent ID 7043 error message is logged and users cannot search the portal site after you remove an index management server from a server farm deployment of SharePoint Portal Server 2003

How to use the Catutil.exe tool

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