处理Elasticsearch 运行报错信息

一、报错信息：SettingsException[Failed to load setting from [elasticsearch.yml]]; nested: ParsingException [Failed to parse object: expecting token of type [START_OBJECT] but found [VALUE_STRING]];'

报错原因：无法解析配置文件elasticsearch.yml。

解决方案：配置文件的语法格式为keyname: value，必须在冒号后面空一格。

 

二、报错信息：org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root

报错原因：不能以root用户运行

解决方案：另建用户运行elasticsearch。

 

三、报错信息：Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch/config/jvm.options

报错原因：运行用户没有elasticsearch文件夹足够权限

解决方案：赋予运行用户相关权限，chown -R elasticsearch:elasticsearch  /usr/local/elasticsearch

 

四、报错信息：ERROR:[4] bootstrap checks failed

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

原因分析：每个进程同时打开的文件数目是有限制的。使用 ulimi -Hn查看。

解决方式：修改/etc/security/limits.conf配置文件

  elasticsearch    soft   nofile      65535

  elasticsearch    hard  nofile      65535

备注:elasticsearch 是运行elasticsearch程序的用户

[2]: memory locking requested for elasticsearch process but memery is not locked.

elasticsearch    soft   memlock  unlimited

  elasticsearch    hard  memlock  unlimited

备注:elasticsearch 是运行elasticsearch程序的用户

[3]: max virtual memory areas vm.max_map_count [6530] is too low, increase to at least [262144].

解决方式： 

在   /etc/sysctl.conf文件最后添加一行

vm.max_map_count=262144

[4]:the default discovery are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured.

 解决方式：修改elasticsearch.yml配置文件

cluster.initial_master_nodes: ["node-1"]