Breaking changes in 7.5

This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 7.5.

See also Release highlights and Release notes.

Search Changes

Stricter checking for wildcard queries on _index

Previously, a wildcard query on the _index field matched directly against the fully-qualified index name. Now, in order to match against remote indices like cluster:index, the query must contain a colon, as in cl*ster:inde*. This behavior aligns with the way indices are matched in the search endpoint.