Elasticsearch 7.7

[Tiger1 (Ju)]

I'm trying to deploy elasticsearch 7.7 cluster, there's problem:

[es2] master not discovered yet, this node has not previously joined a bootstrapped (v7+) cluster, and this node must discover master-eligible nodes [es1, es2, es3] to bootstrap a cluster
this is my

Here is my Elasticsearch.yaml:
cluster.name: es-cluster
node.name: es-1
path.data: /data/elasticsearch
bootstrap.memory_lock: true
network.host: 0.0.0.0
http.port: 9200
transport.port: 9300
discovery.seed_hosts: ["192.168.1.31:9200", "192.168.1.32:9200", "192.168.1.33:9200"]
cluster.initial_master_nodes: ["es1","es2","es3"]

[system]

Elasticsearch 7.7 is EOL and no longer supported. Please upgrade ASAP.

(This is an automated response from your friendly Elastic bot. Please report this post if you have any suggestions or concerns )

[Christian_Dahlqvist]

@Tiger1

discovery.seed_hosts: ["192.168.1.31:9200", "192.168.1.32:9200", "192.168.1.33:9200"]

Remove the port number. Elasticsearch communicates internally over port 9300, not 9200.