linux下elasticsearch启动问题

爱被打了一巴掌 2022-05-06 07:16 373阅读 0赞

此篇文章用于收纳安装elasticsearch后启动遇到的一些问题。

### 文章目录 ###

*   *   *   *  问题1：can not run elasticsearch as root
             *  问题2：max file descriptors for elasticsearch process is too low
             *  问题3：max virtual memory areas vm.max\_map\_count is too low
             *  问题4：failed to send join request to master

#### 问题1：can not run elasticsearch as root ####

直接用root用户启动会出现如下类似的错误：

root@cc-server:/home/environment/elasticsearch-6.4.2# ./bin/elasticsearch
    [2018-10-11T18:37:43,323][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
    org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
    	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.4.2.jar:6.4.2]
    	at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.4.2.jar:6.4.2]
    	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.4.2.jar:6.4.2]
    Caused by: java.lang.RuntimeException: can not run elasticsearch as root
    	at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.2.jar:6.4.2]
    	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.2.jar:6.4.2]
    	... 6 more

解决办法：

//添加用户
    adduser elasticsearch
    //为用户赋值权限目录
    //chown -R [用户][所属组] 文件夹目录
    chown -R elasticsearch:elasticsearch elasticsearch-6.4.2/

#### 问题2：max file descriptors for elasticsearch process is too low ####

在es启动时可能出现类似ERROR信息如下：

max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]

解决办法：

修改文件/etc/security/limits.conf

vim /etc/security/limits.conf

添加如下配置,配置值设为需要的值即可：

#<domain>   <type>  <item>  <value>
    #四个元素的意义在该文件中均有详细描述
    elasticsearch soft nofile 65536
    elasticsearch hard nofile 65536

#### 问题3：max virtual memory areas vm.max\_map\_count is too low ####

在es启动时可能出现类似ERROR信息如下：