一、错误提示：
max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144] max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
解决方法：
错误一：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
//打开配置文件 vim /etc/sysctl.conf //加入 vm.max_map_count=262144 //执行命令 sysctl -p
//然后保存
错误二：max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
//编辑配置文件 vim /etc/security/limits.conf //加入以下2行 redhat hard nofile 65536 redhat soft nofile 65536 //保存退出
重新启动Elasticsearch