발단 root@ubuntu:/var/log/elasticsearch# curl -X GET "localhost:9200" curl: (52) Empty reply from server [WARN ][o.e.h.n.Netty4HttpServerTransport] [ubuntu] received plaintext http traffic on an https channel, closing connection Netty4HttpChannel{localAddress=/127.0.0.1:9200, remoteAddress=/127.0.0.1:52654} root@ubuntu:/var/lib# systemctl status elasticsearch ● elasticsearch.service - Elasticsearc..
