I follow the this link https://www.digitalocean.com/community/tutorials/how-to-install-elasticsearch-logstash-and-kibana-elastic-stack-on-centos-7 to setup elasticsearch in my RH linux server.
Elasticsearch.service is running well without xpack.security.enabled: true in my elasticsearch.yml.
But service fail when xpack.security.enabled: true is implemented in elasticsearch.yml