ELK學習筆記之Elasticsearch啟動常見錯誤
阿新 • • 發佈:2018-11-02
問題出現的環境:
OS版本:CentOS-7-x86_64-Minimal-1708
ES版本:elasticsearch-6.2.2
1. max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
每個程序最大同時開啟檔案數太小,可通過下面2個命令檢視當前數量
ulimit -Hn
ulimit -Sn
修改/etc/security/limits.conf檔案,增加配置,使用者退出後重新登入生效
* soft nofile 65536 * hard nofile 65536
2. max number of threads [3818] for user [es] is too low, increase to at least [4096]
問題同上,最大執行緒個數太低。修改配置檔案/etc/security/limits.conf,增加配置
可通過命令檢視
ulimit -Hu ulimit-Su
按照如下更改:
* soft nproc 4096 * hard nproc 4096
3. max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
修改/etc/sysctl.conf檔案,增加配置vm.max_map_count=262144
vi /etc/sysctl.conf sysctl-p
執行命令sysctl -p生效
4. Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-6.2.2-1/config/jvm.options
elasticsearch使用者沒有該資料夾的許可權,執行命令
chown -R es:es /usr/local/elasticsearch/