MongoDB Atlas change history: Issue impacting Atlas Search availability on certain clusters

MongoDB Atlas reported a major Atlas Search incident causing mongot crashes and potential search and vector search outages for a subset of users. It started at 2026-10-09 16:29 UTC and was resolved at 2026-10-09 18:17 UTC, lasting 1 h 47 min. A fix was deployed at 10-09 17:09 UTC.