Elastic Cloud Enterprise breaking changes
Breaking changes can impact your Elastic applications, potentially disrupting normal operations. Before you upgrade Elastic Cloud Enterprise, carefully review the breaking changes and take the necessary steps to mitigate any issues. To learn how to upgrade, check Upgrade.
In addition, before upgrading your deployments, review the breaking changes for any Elastic Stack applications that you're using.
Removed support for 7.x stack versions
Elastic Cloud Enterprise no longer supports stack versions prior to 8.0.0. All deployments must be upgraded to stack version 8.0.0 or later, prior to upgrading to ECE 4.0.
Removed deprecated _upgrade endpoint
The deployments/<deployment_id>/<resource-kind>/<ref_id>/_upgrade endpoint was already deprecated and has now been removed. To upgrade a deployment using the API, you should instead use the /deployments/{deployment_id} endpoint.
Removed Elasticsearch and Kibana URLs from supported settings
ApmSystemSettings, IntegrationsServerSystemSettings, KibanaSystemSettings and EnterpriseSearchSystemSettings no longer support elasticsearchUrl and kibanaUrl fields.