elasticsearch/docs/reference/migration/migrate_8_0/ilm.asciidoc

[float]
[[breaking_80_ilm_changes]]
=== {ilm-cap} changes

//NOTE: The notable-breaking-changes tagged regions are re-used in the
//Installation and Upgrade Guide

//tag::notable-breaking-changes[]

// end::notable-breaking-changes[]

[[ilm-poll-interval-limit]]
.The `indices.lifecycle.poll_interval` setting must be greater than `1s`.
[%collapsible]
====
*Details* +
The setting `indices.lifecycle.poll_interval`, if set too low, can cause
excessive load on a cluster. This setting must now be set to `1s` (one second)
or greater.

*Impact* +
Update the `indices.lifecycle.poll_interval` setting to a value of `1s` or
greater using `elasticsearch.yml` or the
{ref}/cluster-update-settings.html[cluster update settings API].

Setting `indices.lifecycle.poll_interval` to less than `1s` in
`elasticsearch.yml` will result in an error on startup.
{ref}/cluster-update-settings.html[Cluster update settings API] requests that
set `indices.lifecycle.poll_interval` to less than `1s` will return an error.
====

[[ilm-hlrc-rename]]
.The `indexlifecycle` package has been renamed `ilm` in the Java High Level REST Client.
[%collapsible]
====
*Details* +
In the high level REST client, the `indexlifecycle` package has been
renamed to `ilm` to match the package rename inside the {es} code.

*Impact* +
Update your workflow and applications to use the `ilm` package in place of
`indexlifecycle`.
====