完整的错误信息是：uncaught exception in thread [main]org.elasticsearch.bootstrap.StartupException:
java.lang.IllegalStateException: failed to obtain node locks, tried [[/data/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])
寻找主要信息：failed to obtain node locks
简单理解为：绑定节点失败！！！
百度后，好多人同样遇到了这个问题，导致的原因可能是因为之前运行的es还没有正常关闭。
**第一步：**通过命令：ps aux | grep ‘elastic’ 进行查看
ES可能已经起了两个进程，把进程kill掉之后重新启动就可以了。
**第二步：**通过命令： kill -9 进程号 关闭此进程。
**第三步：**重新启动es。./bin/elasticsearch
参考博文：https:///curryni/article/details/80580337
