[[breaking-changes]]
= Breaking changes

[partintro]
--
This section discusses the changes that you need to be aware of when migrating
your application from one version of Elasticsearch to another.

As a general rule:

* Migration between major versions -- e.g. `1.x` to `2.x` --
  requires a <<restart-upgrade,full cluster restart>>.

* Migration between minor versions -- e.g. `1.x` to `1.y` -- can be
  performed by <<rolling-upgrades,upgrading one node at a time>>.

See <<setup-upgrade>> for more info.
--

include::migrate_2_0.asciidoc[]

include::migrate_1_6.asciidoc[]

include::migrate_1_4.asciidoc[]

include::migrate_1_0.asciidoc[]