Log exceptions in the indexItems and deleteItems methods of the SearchApiElasticsearchBackend class.

@dench0, we made a bunch of changes to the 8.0.x branch in 📌 Investigate search_api_opensearch as base for elasticsearch_connector Fixed , so unfortunately, this patch no longer applies. The new indexing code is in \Drupal\elasticsearch_connector\SearchAPI\BackendClient::indexItems()

(I'm looking through issues in the 8.0.x-dev branch as part of a big review of open issues for 🌱 Plan for 8.0.0-alpha release Active : thank you for your patience with me!)

Quick update on this... I took a look at the code to see what's happening now. It looks like the code is now re-throwing SearchAPI exceptions when an exception occurs in the backend. I'm not sure what is catching those exceptions, though.

@dench0, are still experiencing this issue with search_api-8.x-1.35 or higher, and elasticsearch_connector-8.x-8.0.0-alpha1 or higher?

Asking because — since you filed this issue — both Search API and Elasticsearch Connector 8.x have changed quite a bit.