elasticsearch/docs/release-notes/deprecations.md

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navigation_title: "Elasticsearch"

{{es}} deprecations [elasticsearch-deprecations]

Review the deprecated functionality for your {{es}} version. While deprecations have no immediate impact, we strongly encourage you update your implementation after you upgrade.

To learn how to upgrade, check out .

To give you insight into what deprecated features you’re using, {{es}}:

• Returns a Warn HTTP header whenever you submit a request that uses deprecated functionality.
• Logs deprecation warnings when deprecated functionality is used.
• Provides a deprecation info API that scans a cluster’s configuration and mappings for deprecated functionality.

% ## Next version % Release date: Month day, year

9.0.0 [elasticsearch-900-deprecations]

Release date: March 25, 2025

Ingest Node : * Fix _type deprecation on simulate pipeline API #116259

Machine Learning : * [Inference API] Deprecate elser service #113216

Mapping : * Deprecate _source.mode in mappings #116689