[[breaking-changes-7.0]]
== Breaking changes in 7.0

This section discusses the changes that you need to be aware of when migrating
your application to Elasticsearch 7.0.

[float]
=== Indices created before 7.0

Elasticsearch 7.0 can read indices created in version 6.0 or above.  An
Elasticsearch 7.0 node will not start in the presence of indices created in a
version of Elasticsearch before 6.0.

[IMPORTANT]
.Reindex indices from Elasticsearch 5.x or before
=========================================

Indices created in Elasticsearch 5.x or before will need to be reindexed with
Elasticsearch 6.x in order to be readable by Elasticsearch 7.x.

=========================================

[float]
=== Also see:

* <<breaking_70_aggregations_changes>>
* <<breaking_70_cluster_changes>>
* <<breaking_70_indices_changes>>
* <<breaking_70_mappings_changes>>
* <<breaking_70_search_changes>>
* <<breaking_70_plugins_changes>>
* <<breaking_70_analysis_changes>>
* <<breaking_70_api_changes>>
* <<breaking_70_java_changes>>
* <<breaking_70_settings_changes>>


include::migrate_7_0/aggregations.asciidoc[]
include::migrate_7_0/analysis.asciidoc[]
include::migrate_7_0/cluster.asciidoc[]
include::migrate_7_0/indices.asciidoc[]
include::migrate_7_0/mappings.asciidoc[]
include::migrate_7_0/search.asciidoc[]
include::migrate_7_0/plugins.asciidoc[]
include::migrate_7_0/api.asciidoc[]
include::migrate_7_0/java.asciidoc[]
include::migrate_7_0/settings.asciidoc[]