We have Exchange 2013 CU23 with 4 Node DAG between two sites. In one of the server, I have following symptoms and the troubleshooting steps performed to fix the issue, but nothing fix the issue.
Symptoms of the issue:
1. The Content Index status of all DBs shows as failed
2. Unable to hold Active Copy of DB in that server as it automatically fail over to its peer server.
3. Event ID 1010, 1012 are continuously generating in Event Logs
4. The Registry entry of Search status is not updating with current date - HKLM\Software\Microsoft\ExchangeServer\V15\Search\IndexStatus
5. Performance Monitor dose not show any progress of Crawling, Feeding counters of Search Indexes
Troubleshooting steps performed:
1. Basic reseeding attempt using Update-MailboxDatabaseCopy -CatalogOnly cmdlet
2. Basic Rebuild of CI attempt with Index folder deleted/renamed
3. Rebuild of CI with "ContentSubmitter" Active Directory group created
4. Reinstall the FAST folder structure and rebuild of CI
5. Reinstall CU23 and Rebuild CI
6. Uninstall Security update KB4536988 and Rebuild CI
Any help would be appreciated, not sure rebuild of that server is the final fix.