報錯信息一：
ERROR: [2] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]解決方法：
# vim /etc/sysctl.conf
添加下面配置：
vm.max_map_count=655360
並執行命令：
# sysctl -p報錯信息二：
ERROR: [1] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]解決方法：
切換到root用戶
# ulimit -Hn 查看硬限制
# vim /etc/security/limits.conf
##在末尾添加下面設置
* soft nofile 655350
* hard nofile 655350
退出用戶重新登錄，使配置生效
重新 ulimit -Hn 查看硬限制 會發現數值有4096改成65535
# vim /etc/security/limits.d/90-nproc.conf
找到如下內容：
soft nproc 1024
修改爲
soft nproc 2048
報錯信息三：
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to obtain node locks, tried [[/data/elasticsearch/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])?解決方法：
在開啓多個elasticsearch 實例時，config/elasticsearch.yml文件中新增一個配置變量：
[elsearch@Elk_Server elasticsearch]$ vim config/elasticsearch.yml
node.max_local_storage_nodes: 256 報錯信息四：
ERROR: [1] bootstrap checks failed
[1]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
[2019-03-01T16:20:49,025][INFO ][o.e.n.Node ] [node-data1] stopping ...
[2019-03-01T16:20:49,081][INFO ][o.e.n.Node ] [node-data1] stopped
[2019-03-01T16:20:49,081][INFO ][o.e.n.Node ] [node-data1] closing ...
[2019-03-01T16:20:49,100][INFO ][o.e.n.Node ] [node-data1] closed解決方法：
Centos6不支持SecComp，而ES5.2.0默認bootstrap.system_call_filter爲true
禁用：在elasticsearch.yml中配置bootstrap.system_call_filter爲false，注意要在Memory下面:
bootstrap.memory_lock: false
bootstrap.system_call_filter: false