can not set node role to coordinating only on the command line

[hillar]

Elasticsearch Version

8.*

Installed Plugins

na

Java Version

bundled

OS Version

na

Problem Description

bin/elasticsearch -Enode.roles=''

ERROR: setting [node.roles] must not be empty

https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html#coordinating-node

This means that a node that has an explicit empty list of roles via node.roles will only act as a coordinating node

Steps to Reproduce

bin/elasticsearch -Enode.roles=''

ERROR: setting [node.roles] must not be empty

Logs (if relevant)

No response

[slobodanadamovic]

@hillar To set node's role as coordinating only you have to pass -Enode.roles="[]". This is possible since version 8.2.0 (see #85186). If you are using version <=8.2.0, I suggest updating to the latest version.