[[migrating-8.5]]
== Migrating to 8.5
++++
<titleabbrev>8.5</titleabbrev>
++++

This section discusses the changes that you need to be aware of when migrating
your application to {es} 8.5.

See also <<release-highlights>> and <<es-release-notes>>.

coming::[8.5.0]


[discrete]
[[breaking-changes-8.5]]
=== Breaking changes

// tag::notable-breaking-changes[]
There are no breaking changes in {es} 8.5.
// end::notable-breaking-changes[]

[discrete]
[[deprecated-8.5]]
=== Deprecations

The following functionality has been deprecated in {es} 8.5
and will be removed in a future version.
While this won't have an immediate impact on your applications,
we strongly encourage you to take the described steps to update your code
after upgrading to 8.5.

To find out if you are using any deprecated functionality,
enable <<deprecation-logging, deprecation logging>>.


[discrete]
[[deprecations_85_plugins]]
==== Plugin API deprecations

[[network_plugins_deprecated]]
Plugins that extend the NetworkPlugin interface are deprecated.
[%collapsible]
====
*Details* +
Plugins may override funcionality that controls how nodes connect
with other nodes over TCP/IP. These plugins extend the NetworkPlugin
interface. In the next major release, these plugins will fail
to install.

*Impact* +
Discontinue using any plugins which extend NetworkPlugin. You can
see if any plugins use deprecated functionality by checking
the Elasticsearch deprecation log.
====

[[discoveryplugin_joinvalidator_and_election_strategies_deprecated]]
.Extending DiscoveryPlugin to override join validators or election strategies is deprecated
[%collapsible]
====
*Details* +
Plugins that extend DiscoveryPlugin may override getJoinValidator and
getElectionStrategies. These methods are implementation details of the
clustering mechanism within Elasticsearch. They should not be overriden.
In the next major release, plugins overriding getJoinValidator or
getElectionStrategies will fail to install.

*Impact* +
Discontinue using any plugins that override getJoinValidator or
getElectionStrategies in DiscoveryPlugin. You can see if any plugins
use deprecated functionality by checking the Elasticsearch deprecation log.
====