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[DOCS] Add deprecation docs for incompatible builds #77730

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Sep 16, 2021
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[DOCS] Add deprecation docs for incompatible builds #77730

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26 changes: 24 additions & 2 deletions docs/reference/migration/migrate_7_11.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@ See also <<release-highlights>> and <<es-release-notes>>.
* <<breaking_711_rest_changes>>
* <<breaking_711_search_changes>>
* <<breaking_711_transform_changes>>
* <<breaking_711_transport_deprecations>>

//NOTE: The notable-breaking-changes tagged regions are re-used in the
//Installation and Upgrade Guide
Expand Down Expand Up @@ -120,7 +121,6 @@ settings of the transform.
====
//end::notable-breaking-changes[]

////
[discrete]
[[deprecated-7.11]]
=== Deprecations
Expand All @@ -136,4 +136,26 @@ the old behavior is supported until the next major release.
To find out if you are using any deprecated functionality,
enable <<deprecation-logging, deprecation logging>>.

////
[discrete]
[[breaking_711_transport_deprecations]]
==== Transport deprecations

//tag::notable-breaking-changes[]
[[deprecate-unsafely_permit_handshake_from_incompatible_builds]]
.The `es.unsafely_permit_handshake_from_incompatible_builds` system property is deprecated.
[%collapsible]
====
*Details* +
The `es.unsafely_permit_handshake_from_incompatible_builds` system property is
now deprecated.

{es} verifies that communicating pairs of nodes of the same version are running
the same build and using the same wire format. You can bypass this check by
setting `es.unsafely_permit_handshake_from_incompatible_builds` to `true`.
Skipping this check is unsafe and not recommended.

*Impact* +
To avoid deprecation warnings, discontinue use of the system property. Instead
ensure that all nodes of the same version are running the same build.
====
//end::notable-breaking-changes[]