Breaking changes

Before you upgrade, you must review the breaking changes for each product you use and make the necessary changes so your code is compatible with 8.16.1.

APM breaking changes
Beats breaking changes
Elasticsearch migration guide
Elastic Security release notes
Enterprise Search release notes
Fleet and Elastic Agent release notes
Kibana release notes
Logstash breaking changes

Make sure you check the breaking changes for each minor release up to 8.16.1.
If you are using machine learning datafeeds that contain discontinued search or query domain specific language (DSL), the upgrade will fail. In 5.6.5 and later, the Upgrade Assistant provides information about which datafeeds need to be updated.

« Upgrade Kibana Appendix A: Deleted pages »