Attempted to resurrect connection to dead ES instance, but got an error

[naaviin]

Hi friends, i configured accordingly. However i am getting error

logstash.yml

http.host: '0.0.0.0'
xpack.monitoring.elasticsearch.hosts: ["https://es1:9200","https://es2:9200","https://es3:9200"]
xpack.monitoring.elasticsearch.ssl.certificate_authority: '/usr/share/logstash/ca-ca.pem'
xpack.monitoring.elasticsearch.username: 'elastic'
xpack.monitoring.elasticsearch.password: 'myPassword'

logstash.conf

output {
  elasticsearch {
    ssl => true
  }
}