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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 major versions — e.g. 1.x to 2.x — requires a full cluster restart.
Migration between minor versions — e.g. 1.x to 1.y — can be performed by upgrading one node at a time.

See Upgrading for more info.