Azure Cognitive Search issue - Could not fetch additional columns from item/Could not map output field 'title' to search index. Check the 'outputFieldMappings' property of your indexer.

Question

Hi there,
I'm pretty new to ACS and trying to debug an issue why the indexer is showing errors.
The errors are more like warning so not sure why this is happening.

The warnings are :-
Could not fetch additional columns from item
Could not map output field 'title' to search index. Check the 'outputFieldMappings' property of your indexer.

Any ideas of what I should be looking at would be great and where is the best place to look at to pin down the issue?
Is it using debug sessions or just looking at the indexes and indexers?
One of the indexes has no errors but the document scanned is showing zero

Thanks in Advance

Answer 1

Thanks for reaching here! Output field mappings that reference non-existent/null data will produce warnings for each document and result in an empty index field. To work around this issue, double-check your output field-mapping source paths for possible typos, or set a default value using the Conditional skill. See Output field mapping for details.

For more details on how to troubleshoot suggest you to refer below official document links:
https://learn.microsoft.com/en-us/azure/search/cognitive-search-common-errors-warnings#warning-could-not-map-output-field-x-to-search-index
Troubleshooting common indexer errors and warnings
Monitor indexer-based indexing

Let us know.