Elasticsearch7.15.2 出现 node validation exception 的问题处理

3个异常如下：

[1]: max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]
  [2]: memory locking requested for elasticsearch process but memory is not locked
  [3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

[1]: max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]
切换到root用户，编辑limits.conf 添加类似如下内容 

 vim /etc/security/limits.conf 
 添加如下内容:
 *               soft    nofile          262144
 *               hard    nofile          262144

wenti2我没遇到

[2]: memory locking requested for elasticsearch process but memory is not locked
原因：锁定内存失败

解决方案：
切换到root用户，编辑limits.conf配置文件， 添加类似如下内容：

sudo vim /etc/security/limits.conf
 

添加如下内容:

* soft memlock unlimited
* hard memlock unlimited
 


备注：* 代表Linux所有用户名称

保存、退出、重新登录才可生效

问题3

[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
原因：最大虚拟内存太小
解决方案：切换到root用户下，修改配置文件sysctl.conf

sudo vim /etc/sysctl.conf
 

添加下面配置：

vm.max_map_count=655360
 

并执行命令：

sysctl -p