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Migrating to 8.13

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Migrating to 8.13

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This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 8.13.

Coming in 8.13.0.

Breaking changes

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There are no breaking changes in 8.13.

Notable changes

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The following are notable, non-breaking updates to be aware of:

Changes to features that are in Technical Preview.
Changes to log formats.
Changes to non-public APIs.
Behaviour changes that repair critical bugs.

Index setting changes

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Change index.look_ahead_time index setting’s default value from 2 hours to 30 minutes.

Details
Lower the index.look_ahead_time index setting’s max value from 2 hours to 30 minutes.

Impact
Documents with @timestamp of 30 minutes or more in the future will be rejected. Before documents with @timestamp of 2 hours or more in the future were rejected. If the previous behaviour should be kept, then update the index.look_ahead_time setting to two hours before performing the upgrade.

Lower the look_ahead_time index setting’s max value

Details
Lower the look_ahead_time index setting’s max value from 7 days to 2 hours.

Impact
Any value between 2 hours and 7 days will be as a look ahead time of 2 hours is defined

REST API changes

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ESQL: Grammar - FROM METADATA no longer requires []

Details
Remove [ ] for METADATA option inside FROM command statements

Impact
Previously to return metadata fields, one had to use square brackets: (eg. FROM index [METADATA _index]). This is no longer needed: the [ ] are dropped and do not have to be specified, thus simplifying the command above to:'FROM index METADATA _index'.

ES|QL: remove PROJECT keyword from the grammar

Details
Removes the PROJECT keyword (an alias for KEEP) from ES|QL grammar

Impact
Before this change, users could use PROJECT as an alias for KEEP in ESQL queries, (eg. FROM idx | PROJECT name, surname) the parser replaced PROJECT with KEEP, emitted a warning: PROJECT command is no longer supported, please use KEEP instead and the query was executed normally. With this change, PROJECT command is no longer recognized by the query parser; queries using PROJECT command now return a parsing exception.

[ESQL] Remove is_nan, is_finite, and is_infinite

Details
Removes the functions is_nan, is_finite, and is_infinite.

Impact
Attempting to use the above functions will now be a planner time error. These functions are no longer supported.

Deprecations

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The following functionality has been deprecated in Elasticsearch 8.13 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 8.13.

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

Cluster and node setting deprecations

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Deprecate client.type

Details
The node setting client.type has been ignored since the node client was removed in 8.0. The setting is now deprecated and will be removed in a future release.

Impact
Remove the client.type setting from elasticsearch.yml

REST API deprecations

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DesiredNode: deprecate node_version field and make it optional for the current version

Details
The desired_node API includes a node_version field to perform validation on the new node version required. This kind of check is too broad, and it’s better done by external logic, so it has been removed, making the node_version field not necessary. The field will be removed in a later version.

Impact
Users should update their usages of desired_node to not include the node_version field anymore.

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