This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 7.3.
Transform API changesedit
It is no longer possible to supply the
format parameter when you define a
date_histogram transform pivot. Previously constructed transforms
will still run but the configured
format will be ignored.
dense_vector field now requires
dims parameter, specifying the number of
dimensions for document and query vectors for this field.
Defining multi-fields within multi-fieldsedit
Previously, it was possible to define a multi-field within a multi-field.
Defining chained multi-fields is now deprecated and will no longer be supported
in 8.0. To resolve the issue, all instances of
fields that occur within a
fields block should be removed from the mappings, either by flattening the
fields blocks into a single level, or by switching to
IndexStore and DirectoryService have been replaced by a stateless and simple DirectoryFactory interface to create custom Lucene directory instances per shard.
Deprecation of queriesedit
common query has been deprecated. The same functionality can be achieved
match query if the total number of hits is not tracked.
Deprecation of query parametersedit
cutoff_frequency parameter has been deprecated for
queries. The same functionality can be achieved without any configuration provided
that the total number of hits is not tracked.
Directly modifying aliases of follower indices is no longer allowededit
Aliases are now replicated to a follower from its leader, so directly modifying aliases on follower indices is no longer allowed.