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Breaking changes

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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. 6.x to 6.y — can be performed by upgrading one node at a time.
  • Migration between consecutive major versions — e.g. 5.x to 6.x — requires a full cluster restart.
  • Migration between non-consecutive major versions — e.g. 2.x to 6.x — is not supported.

For more information, see Upgrade Elasticsearch.

See also Release Highlights and Release Notes.

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