原文链接:https://wwwblogs/zhi-leaf/p/8484337.html
文章目录
- 问题出现环境,OS版本:CentOS-7-x86_64;ES版本:elasticsearch-7.13
- Q1:max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
- Q2:max number of threads [3818] for user [es] is too low, increase to at least [4096]
- Q3:max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
- Q4:Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-7.13/config/jvm.options
- Q5: 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
- Q6:es集群启动完成后浏览器输入/_cat/nodes?pretty报master_not_discovered_exception
问题出现环境,OS版本:CentOS-7-x86_64;ES版本:elasticsearch-7.13
Q1:max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
-
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
Q2:max number of threads [3818] for user [es] is too low, increase to at least [4096]
-
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(和问题1是一个文件),增加配置
* soft nproc 4096 * hard nproc 4096
可通过命令查看
ulimit -Hu ulimit -Su
修改后的文件:
* soft nofile 65536 * hard nofile 65536 * soft nproc 4096 * hard nproc 4096
Q3:max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
-
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
Q4:Exception in thread “main” java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-7.13/config/jvm.options
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Exception in thread “main” java.nio.file.AccessDeniedException: /usr/local/elasticsearch/elasticsearch-7.13/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/
Q5: 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
原文链接: https://blog.csdn/qq_43655835/article/details/104637625
在elasticsearch的config目录下,修改elasticsearch.yml配置文件,将下面的配置加入到该配置文件中:
ip替换host1等,多节点请添加多个ip地址,单节点可写按默认来
#配置以下三者,最少其一
#[discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes]
cluster.initial_master_nodes: ["node-1"] #这里的node-1为node-name配置的值
Q6:es集群启动完成后浏览器输入/_cat/nodes?pretty报master_not_discovered_exception
原文链接:https://yanglinwei.blog.csdn/article/details/105274464
es集群启动后,在浏览器输入:http://es ip地址:端口/_cat/nodes?pretty,会提示如下错误:
{ "error" : { "root_cause" : [ { "type" : "master_not_discovered_exception", "reason" : null } ], "type" : "master_not_discovered_exception", "reason" : null }, "status" : 503 }
解决方案:
在每个配置文件指定初始节点:
cluster.initial_master_nodes: node-1
重启ES集群,浏览器再次输入http://es ip地址:端口/_cat/nodes?pretty,就可以看到集群启动成功了:
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