This section discusses the changes that you need to be aware of when migrating your application to Elasticsearch 7.2.
In earlier versions you could include a range of ports in entries in the
discovery.seed_hosts list, but Elasticsearch used only the first port in the range and
unexpectedly ignored the rest. For instance if you set
"10.11.12.13:9300-9310" then Elasticsearch would only use
discovery. Seed host addresses containing port ranges are now rejected.