Dynamic setting discovery.zen.ping.unicast.hosts?

Elastic Stack Elasticsearch
1

ES 5.0

How can I dynamic dynamic setting discovery.zen.ping.unicast.hosts?

curl -XPUT 'http://abcd:9200/_cluster/settings?pretty' -d '{
    "transient" : {
        "discovery.zen.ping.unicast.hosts" : ["abcd", "bcde", "cdef"]
    }
}'

I get the following:

{
  "error" : {
    "root_cause" : [
      {
        "type" : "remote_transport_exception",
        "reason" : "[es002][bcde:9300][cluster:admin/settings/update]"
      }
    ],
    "type" : "illegal_argument_exception",
    "reason" : "transient setting [discovery.zen.ping.unicast.hosts.0], not dynamically updateable"
  },
  "status" : 400
}

https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-update-settings.html

2

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