[[breaking-changes-7.7]]
== Breaking changes in 7.7
++++
<titleabbrev>7.7</titleabbrev>
++++

This section discusses the changes that you need to be aware of when migrating
your application to Elasticsearch 7.7.

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

coming[7.7.0]

//NOTE: The notable-breaking-changes tagged regions are re-used in the
//Installation and Upgrade Guide

//tag::notable-breaking-changes[]

//end::notable-breaking-changes[]

[discrete]
[[breaking_77_logging_changes]]
=== Logging changes

[discrete]
==== Loggers under `org.elasticsearch.action` now log at `INFO` level by default

The default log level for most loggers is `INFO`, but in earlier versions
loggers in the `org.elasticsearch.action.*` hierarchy emitted log messages at
`DEBUG` level by default. This sometimes resulted in a good deal of unnecessary
log noise. From 7.7 onwards the default log level for logger in this hierarchy
is now `INFO`, in line with most other loggers. If needed, you can recover the
pre-7.7 default behaviour by adjusting your <<logging>>.

[discrete]
[[breaking_77_settings_changes]]
=== Settings changes

[discrete]
[[deprecate-missing-realm-order]]
==== Authentication realm `order` will be a required config in version 8.0.0.

The `order` config will be required in version 8.0.0 for authentication realm
configuration of any type. If the `order` config is missing for a realm, the node
will fail to start.

[discrete]
[[deprecate-duplicated-realm-orders]]
==== Authentication realm `order` uniqueness will be enforced in version 8.0.0.

The `order` config of authentication realms must be unique in version 8.0.0.
If you configure more than one realm of any type with the same order, the node will fail to start.

[discrete]
[[breaking_77_search_changes]]
=== Search changes

[discrete]
==== Consistent rounding of range queries on `date_range` fields
`range` queries on `date_range` field currently can have slightly differently
boundaries than their equivalent query on a pure `date` field. This can e.g.
happen when using date math or dates that don't specify up to the last
millisecond. While queries on `date` field round up to the latest millisecond
for `gt` and `lte` boundaries, the same queries on `date_range` fields didn't
do this. The behavior is now the same for both field types like documented in
<<range-query-date-math-rounding>>.