[[breaking-changes-8.0]]
== Breaking changes in 8.0
++++
<titleabbrev>8.0</titleabbrev>
++++

This section discusses the changes that you need to be aware of when migrating
your application to {es} 8.0.

See also <<release-highlights>> and <<es-release-notes>>.

coming[8.0.0]

* <<breaking_80_analysis_changes>>
* <<breaking_80_discovery_changes>>
* <<breaking_80_mappings_changes>>
* <<breaking_80_packaging_changes>>
* <<breaking_80_rollup_changes>>
* <<breaking_80_snapshots_changes>>
* <<breaking_80_security_changes>>
* <<breaking_80_ilm_changes>>
* <<breaking_80_java_changes>>
* <<breaking_80_network_changes>>
* <<breaking_80_node_changes>>
* <<breaking_80_transport_changes>>
* <<breaking_80_http_changes>>
* <<breaking_80_reindex_changes>>
* <<breaking_80_search_changes>>
* <<breaking_80_settings_changes>>

//NOTE: The notable-breaking-changes tagged regions are re-used in the
//Installation and Upgrade Guide

//tag::notable-breaking-changes[]
[float]
==== Indices created before 7.0

Elasticsearch 8.0 can read indices created in version 7.0 or above.  An
Elasticsearch 8.0 node will not start in the presence of indices created in a
version of Elasticsearch before 7.0.

[IMPORTANT]
.Reindex indices from Elasticsearch 6.x or before
=========================================

Indices created in Elasticsearch 6.x or before will need to be reindexed with
Elasticsearch 7.x in order to be readable by Elasticsearch 8.x.

=========================================
// end::notable-breaking-changes[]

include::migrate_8_0/analysis.asciidoc[]
include::migrate_8_0/discovery.asciidoc[]
include::migrate_8_0/mappings.asciidoc[]
include::migrate_8_0/packaging.asciidoc[]
include::migrate_8_0/rollup.asciidoc[]
include::migrate_8_0/snapshots.asciidoc[]
include::migrate_8_0/security.asciidoc[]
include::migrate_8_0/ilm.asciidoc[]
include::migrate_8_0/java.asciidoc[]
include::migrate_8_0/network.asciidoc[]
include::migrate_8_0/node.asciidoc[]
include::migrate_8_0/transport.asciidoc[]
include::migrate_8_0/http.asciidoc[]
include::migrate_8_0/reindex.asciidoc[]
include::migrate_8_0/search.asciidoc[]
include::migrate_8_0/settings.asciidoc[]