This list summarizes the most important breaking changes in Elasticsearch 7.2.1. For the complete list, go to Elasticsearch breaking changes.

Discovery changesedit

Only a single port may be given for each seed host.edit

In earlier versions you could include a range of ports in entries in the discovery.seed_hosts list, but Elasticsearch used only the first port in the range and unexpectedly ignored the rest. For instance if you set discovery.seed_hosts: "10.11.12.13:9300-9310" then Elasticsearch would only use 10.11.12.13:9300 for discovery. Seed host addresses containing port ranges are now rejected.

Index lifecycle management (ILM) deprecationsedit

An ILM poll interval of less than one second is deprecated.edit

Setting indices.lifecycle.poll_interval to less than one second (1s) is now deprecated. If the indices.lifecycle.poll_interval cluster setting is too low, it can cause excessive load on a cluster.

To avoid deprecation warnings, use a setting value of 1s or greater.

Ingest pipeline changesedit

The user_agent ingest processor’s ecs parameter is deprecated.edit

The ecs parameter for the user_agent ingest processor is deprecated and will be removed in 8.0. In 8.x, the user_agent ingest processor will only return Elastic Common Schema (ECS) fields.

To avoid deprecation warnings, remove the parameter from your ingest pipelines.