报错：
[2019-01-15T12:36:59,779][ERROR][o.e.b.Bootstrap ] Exception
java.lang.IllegalStateException: failed to obtain node locks, tried [[/mnt/elasticsearch/data/my-application]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?解决方法：
elasticsearch.yml 配置文件最后添加 node.max_local_storage_nodes: 2