Migrating to 8.11

This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 8.11.

See also What’s new in 8.17 and Release notes.

The following changes in Elasticsearch 8.11 might affect your applications and prevent them from operating normally. Before upgrading to 8.11, review these changes and take the described steps to mitigate the impact.

There are no notable breaking changes in Elasticsearch 8.11. But there are some less critical breaking changes.

Remove transport_versions from cluster state API

Details
The transport_versions subobject of the response to GET _cluster/state has been replaced by the nodes_versions subobject.

Impact
If needed, retrieve the per-node transport versions from the nodes_versions subobject.

The following functionality has been deprecated in Elasticsearch 8.11 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 8.11.

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

Rollup functionality is now deprecated

Details
Rollup functionality has been deprecated and will be removed in a future release. Previously, rollups were available in technical preview.

Impact
Use downsampling to reduce storage costs for time series data by storing it at reduced granularity.