This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 7.2.

See also What’s new in 7.7 and Release notes.

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.