Automatic Index Health Check and Rebuild

[jpkeisala]

In some projects, we use Examine index to power critical features like news and blog listings. Occasionally, the index becomes corrupted or unexpectedly empty. Possibly due to deployment, cold starts, or infrastructure issues. When this happens, listings break, resulting in a poor experience for visitors and clients.

Currently, the only fix is to manually rebuild the index through the backoffice. However, this is reactive and requires manual intervention.

Feature Request:
Please consider adding native support for automatic Examine index health checks and self-healing mechanisms, such as:

• Periodic background checks on index health (e.g., expected number of documents).
• Automatic rebuild of a specific index if it's empty or unreadable.
• Configuration options to enable/disable this behavior per environment.
• Logging and notifications when an index rebuild is triggered.

Use Case:
This would help prevent broken listings and eliminate the need for manual intervention after restarts or deploys, especially in cloud environments where file-based indexes may get out of sync.

[AndyBoot]

I'd like to see improvements to resolve the reported issue too, but for the CMS as a whole, not just Cloud.

@jpkeisala perhaps this issue could be created or linked to on https://github.com/umbraco/Umbraco-CMS/issues? May get better visibility and a response.