org.apache.http.ConnectionClosedException: Connection is closed

SpringBoot集成微软的open distro Elasticsearch报org.apache.http.ConnectionClosedException: Connection is closed异常，一直连不上，但是连接开源的就可以，查看了open distro Elasticsearch的官网猜测是做了安全的验证，但是open distro Elasticsearch官网又没有详细的java的api操作，有人知道怎么操作吗，非常急，不胜感激