elasticsearch启动常见错误

水深无声 2023-10-18 14:01 129阅读 0赞

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问题出现环境，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 \[65536\]

每个进程最大同时打开文件数太小，可通过下面2个命令查看当前数量

ulimit -Hn
    ulimit -Sn

修改/etc/security/limits.conf文件，增加配置，用户退出后重新登录生效

*               soft    nofile          65536
    *               hard    nofile          65536

![1031555-20180228192703048-776330364.png][]

2、max number of threads \[3818\] for user \[es\] is too low, increase to at least \[4096\]

问题同上，最大线程个数太低。修改配置文件/etc/security/limits.conf，增加配置

<table> 
 <tbody> 
  <tr> 
   <td> <p>1</p> <p>2</p> </td> 
   <td> <p><code>*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; soft&nbsp;&nbsp;&nbsp; nproc&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4096</code></p> <p><code>*&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; hard&nbsp;&nbsp;&nbsp; nproc&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4096</code></p> </td> 
  </tr> 
 </tbody> 
</table>

可通过命令查看

ulimit -Hu
    ulimit -Su

![1031555-20180228193331496-1676615485.png][]

3、max virtual memory areas vm.max\_map\_count \[65530\] is too low, increase to at least \[262144\]

修改/etc/sysctl.conf文件，增加配置vm.max\_map\_count=262144

vi /etc/sysctl.conf
    sysctl -p

执行命令sysctl -p生效

![1031555-20180228170034226-366544473.png][]

4、Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-6.2.2-1/config/jvm.options

elasticsearch用户没有该文件夹的权限，执行命令

chown -R es:es /usr/local/elasticsearch/

[1031555-20180228192703048-776330364.png]: https://images2018.cnblogs.com/blog/1031555/201802/1031555-20180228192703048-776330364.png
[1031555-20180228193331496-1676615485.png]: https://images2018.cnblogs.com/blog/1031555/201802/1031555-20180228193331496-1676615485.png
[1031555-20180228170034226-366544473.png]: https://images2018.cnblogs.com/blog/1031555/201802/1031555-20180228170034226-366544473.png