elasticsearch 安装常见问题解决办法

喜欢ヅ旅行 2023-07-20 13:52 46阅读 0赞

# 本文章记录安装es过程中碰到的各种常见问题及解决方案 #

**目录**

本文章记录安装es过程中碰到的各种常见问题及解决方案

1、./elasticsearch-7.6.1/bin/elasticsearch 启动报以杀死  这个问题 没有生成其他日志 只有gc的，根据gc 日志分析 分配内存问题

解决:

2、type \[START\_OBJECT\] but found \[VALUE\_STRING\]\];

解决：

3、

\[1\]: max file descriptors \[4096\] for elasticsearch process is too low, increase to at least \[65535\]\[2\]: max virtual memory areas vm.max\_map\_count \[65530\] is too low, increase to at least \[262144\]\[3\]: the default discovery settings are unsuitable for production use; at least one of \[discovery.seed\_hosts,

这里是三个问题

\[1\]: max file descriptors \[4096\] for elasticsearch process is too low, increase to at least \[65535\]

\[2\]: max virtual memory areas vm.max\_map\_count \[65530\] is too low, increase to at least \[262144\]

\[3\]: the default discovery settings are unsuitable for production use; at least one of \[discovery.seed\_hosts,

--------------------

## 1、./elasticsearch-7.6.1/bin/elasticsearch 启动报以杀死  这个问题 没有生成其他日志 只有gc的，根据gc 日志分析 分配内存问题 ##

>   
> Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.  
> 已杀死

###  解决: ###

编辑   vi config/jvm.options  文件

找到

\-Xms1g  
\-Xmx1g

修改成你本身机器所能承受的范围即可 如 512m

## 2、type \[START\_OBJECT\] but found \[VALUE\_STRING\]\]; ##

> \[elsearch@k8a elasticsearch-7.6.1\]$ ./bin/elasticsearch  
> Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.  
> Exception in thread "main" 2020-04-02 10:33:21,459 main ERROR No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html for instructions on how to configure Log4j 2  
> SettingsException\[Failed to load settings from \[elasticsearch.yml\]\]; nested: ParsingException\[Failed to parse object: expecting token of type \[START\_OBJECT\] but found \[VALUE\_STRING\]\];  
>     at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1097)  
>     at org.elasticsearch.common.settings.Settings$Builder.loadFromPath(Settings.java:1070)  
>     at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:83)  
>     at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:100)  
>     at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:91)  
>     at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)  
>     at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:125)  
>     at org.elasticsearch.cli.Command.main(Command.java:90)  
>     at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126)  
>     at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92)  
> Caused by: ParsingException\[Failed to parse object: expecting token of type \[START\_OBJECT\] but found \[VALUE\_STRING\]\]  
>     at org.elasticsearch.common.xcontent.XContentParserUtils.ensureExpectedToken(XContentParserUtils.java:78)  
>     at org.elasticsearch.common.settings.Settings.fromXContent(Settings.java:617)  
>     at org.elasticsearch.common.settings.Settings.access$400(Settings.java:82)  
>     at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1093)  
>

### 解决： ###

这个是因为编辑   vi config/elasticsearch.yml  的key 和value 写错了导致， 仔细检查你所修改的地方就可以发现问题

提示，key 和value 之间除了：还有个 空格 如：    key: (空格)value

## 3、 ##

## \[1\]: max file descriptors \[4096\] for elasticsearch process is too low, increase to at least \[65535\]   \[2\]: max virtual memory areas vm.max\_map\_count \[65530\] is too low, increase to at least \[262144\]   \[3\]: the default discovery settings are unsuitable for production use; at least one of \[discovery.seed\_hosts, ##

## 这里是三个问题 ##

> \[1\]: max file descriptors \[4096\] for elasticsearch process is too low, increase to at least \[65535\]  
> \[2\]: max virtual memory areas vm.max\_map\_count \[65530\] is too low, increase to at least \[262144\]  
> \[3\]: the default discovery settings are unsuitable for production use; at least one of \[discovery.seed\_hosts, discovery.seed\_providers, cluster.initial\_master\_nodes\] must be configured  
> ERROR: Elasticsearch did not exit normally - check the logs at /home/elsearch/elasticsearch-7.6.1/logs/elasticsearch.log

### \[1\]: max file descriptors \[4096\] for elasticsearch process is too low, increase to at least \[65535\] ###

解决

**编辑文件 用root 用户**

vi /etc/security/limits.conf

** 请将es修改为你对应的 启动 elasticsearch 用户名 **

es hard nofile 65536
    es soft nofile 65536

重启服务器  在重新启动es即可

### \[2\]: max virtual memory areas vm.max\_map\_count \[65530\] is too low, increase to at least \[262144\] ###

解决：

切换到root用户修改配置sysctl.conf

vi /etc/sysctl.conf

添加下面配置：