Elasticsearch踩坑：received plaintext http traffic on an https channel, closing connection Netty4HttpCh

踩坑：

当我们访问ip+9200 验证是否启动成功时报错

received plaintext http traffic on an https channel, closing connection Netty4HttpChannel{localAddress=/172.16.5.10:9200,
remoteAddress=/172.16.11.68:11111}

如图：

原因：Elasticsearch开启了安全认证
解决：在config/目录下面的elasticsearch.yml配置文件，把安全认证开关从原先的true改成false，实现免密登录访问即可，修改如图：