Migrating to 9.0

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This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 9.0.

See also What’s new in 9.0 and Release notes.

Coming in 9.0.0.

Breaking changes

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The following changes in Elasticsearch 9.0 might affect your applications and prevent them from operating normally. Before upgrading to 9.0, review these changes and take the described steps to mitigate the impact.

Deprecations

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The following functionality has been deprecated in Elasticsearch 9.0 and will be removed in a future version. While this won’t have an immediate impact on your applications, we strongly encourage you to take the described steps to update your code after upgrading to 9.0.

To find out if you are using any deprecated functionality, enable deprecation logging.