Node.role: [data_cold]

[mutt13y (Stuart Gall)]

Hi
According to

Node | Elasticsearch Reference [7.10] | Elastic

I should set my cold nodes to data cold

I have
node.attr.class: cold
node.roles: ["data_cold"]

set in elasticsearch.yml
Yet I get this on startup

[2020-11-14T12:24:27,891][ERROR][o.e.b.Bootstrap          ] [gla1vm51] Exception
java.lang.IllegalArgumentException: unknown role [data_cold]
        at org.elasticsearch.cluster.node.DiscoveryNode.getRoleFromRoleName(DiscoveryNode.java:503) ~[elasticsearch-7.9.1.jar:7.9.1]
        at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) ~[?:?]
        at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1624) ~[?:?]
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
        at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
        at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913) ~[?:?]
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
        at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578) ~[?:?]

I wanted to set the role because even though I have the hot nodes set as ingest I see replica shards being moved to the cold nodes that have not yet reached the cold part if the ilm

Any help appreciated

Thanks
Stuart

[DavidTurner]

You have linked to the docs for 7.10 but you are only running 7.9.1, which behaves differently in this respect.