elasticsearch/docs/reference/elasticsearch-plugins/mandatory-plugins.md

mapped_pages	applies_to
https://www.elastic.co/guide/en/elasticsearch/plugins/current/mandatory-plugins.html	deployment self ga

Mandatory plugins [mandatory-plugins]

If you rely on some plugins, you can define mandatory plugins by adding plugin.mandatory setting to the config/elasticsearch.yml file, for example:

plugin.mandatory: analysis-icu,lang-js

For safety reasons, a node will not start if it is missing a mandatory plugin.