安裝Elasticsearch出現 node validation exception 的問題處理

3個異常如下：

  [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]
切換到root用戶，編輯limits.conf 添加類似如下內容 

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

wenti2我沒遇到

[2]: memory locking requested for elasticsearch process but memory is not locked
原因：鎖定內存失敗

解決方案：
切換到root用戶，編輯limits.conf配置文件， 添加類似如下內容：

sudo vim /etc/security/limits.conf
 

添加如下內容:

* soft memlock unlimited
* hard memlock unlimited
 


備註：* 代表Linux所有用戶名稱

保存、退出、重新登錄纔可生效

問題3

[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
原因：最大虛擬內存太小
解決方案：切換到root用戶下，修改配置文件sysctl.conf

sudo vim /etc/sysctl.conf
 

添加下面配置：

vm.max_map_count=655360
 

並執行命令：

sysctl -p