解决ES6.6.0开启锁定内存后不能重新，报错“memory locking requested for elasticsearch process but memory is not locked”

客官°小女子只卖身不卖艺 2023-02-09 14:29 33阅读 0赞

错误原因就是我们在配置文件里开启了  
`bootstrap.memory_lock: true`  
不需要次需求的话，改成`false`就好  
如果需要开启，按照下面来，亲测可行

[root@localhost ~]# !234
    grep -Ev "#|^$" /etc/elasticsearch/elasticsearch.yml 
    node.name: node-1
    path.data: /data/elasticsearch
    path.logs: /var/log/elasticsearch
    bootstrap.memory_lock: true
    network.host: 192.168.10.8
    http.port: 9200
    [root@localhost ~]#

内存锁定不能自己单独使用，他是需要和 `/etc/elasticsearch/jvm.options`关联一起使用  
根据你的主机内存分配

-Xms1g   # 设置分配的最小内存
    -Xmx1g   # 设置分配的最大内存，且官方推荐最大32G

这还没完，重启肯定还是不行的  
还需要执行：`systemctl edit elasticsearch` 该文件会在默认编辑器中自动打开  
进到一个界面，添加以下2行  
`[Service]`  
`LimitMEMLOCK=infinity`

修改完后F2 ——“yes”——“回车”即可退出

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzgxNTE0MA_size_16_color_FFFFFF_t_70]  
修改完成，`systemctl daemon-reload`  
重启就没有问题啦

另外可以参考官网文档：[https://www.elastic.co/guide/en/elasticsearch/reference/6.6/setting-system-settings.html\#systemd][https_www.elastic.co_guide_en_elasticsearch_reference_6.6_setting-system-settings.html_systemd]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzgxNTE0MA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200519162432417.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzgxNTE0MA==,size_16,color_FFFFFF,t_70
[https_www.elastic.co_guide_en_elasticsearch_reference_6.6_setting-system-settings.html_systemd]: https://www.elastic.co/guide/en/elasticsearch/reference/6.6/setting-system-settings.html#systemd