Breaking changes edit

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 minor versions — e.g. 5.x to 5.y — can be performed by upgrading one node at a time.
Migration between consecutive major versions — e.g. 2.x to 5.x — requires a full cluster restart.
Migration between non-consecutive major versions — e.g. 1.x to 5.x — is not supported.