Elasticsearch启动常见问题

Elasticsearch启动常见问题

 

文件夹赋予用户权限

[root@chenxi elasticsearch]# chown -R eschenxi:esgroup /chenxi/software/elasticsearch #"/chenxi/software/elasticsearch" 为安装目录

错误信息：max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

ERROR: [1] bootstrap checks failed

[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

ERROR: Elasticsearch did not exit normally - check the logs at /chenxi/software/elasticsearch/logs/elasticsearch.log

 

解决办法：

[root@chenxi elasticsearch]# vim /etc/sysctl.conf

在文件末尾追加：vm.max_map_count=655360

保存后执行

[root@chenxi elasticsearch]# sysctl -p

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

ERROR: [5] bootstrap checks failed

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

[2]: max number of threads [1024] for user [es] is too low, increase to at least [4096]

[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

[4]:  failed to install; check the logs and fix your configuration or disable system call filters at your own risk

[5]: 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

 

 

解决办法：

[root@chenxi elasticsearch]# vim /etc/security/limits.conf

## 65535修改为65536

* soft nofile 65536

* hard nofile 65536

## 文件末尾追加

* soft nproc 4096

* hard nproc 4096

修改文件后保存并“关闭会话，重新登陆服务器”

 

错误信息：system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

ERROR: [2] bootstrap checks failed

[1]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

[2]: 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

 

解决办法：

##在elasticsearch.yml修改并添加配置项

[root@chenxi elasticsearch]# vim config/elasticsearch.yml

# ----------------------------------- Memory -----------------------------------

#

# Lock the memory on startup:

# 取消注释并设置值为false

bootstrap.memory_lock: false

# 追加配置项

bootstrap.system_call_filter: false

 

错误信息： the default discovery settings are unsuitable for production use; at least one of

ERROR: [1] bootstrap checks failed

[1]: 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

 

解决办法：

##在elasticsearch.yml添加配置项

[root@chenxi elasticsearch]# vim config/elasticsearch.yml

 

# --------------------------------- Discovery ----------------------------------

#

# Pass an initial list of hosts to perform discovery when this node is started:

# The default list of hosts is ["127.0.0.1", "[::1]"]

#

#discovery.seed_hosts: ["host1", "host2"]

#

# Bootstrap the cluster using an initial set of master-eligible nodes:

# 取消注释，并保留一个节点

cluster.initial_master_nodes: ["node-1"]

 

测试Es启动是否正常：

http://IP:9092

{

     "name" : "chenxi",

     "cluster_name" : "elasticsearch",

     "cluster_uuid" : "_na_",

     "version" : {

               "number" : "7.6.0",

                "build_flavor" : "default",

                "build_type" : "tar",

                "build_hash" : "7f634e9f44834fbc12724506cc1da681b0c3b1e3",

                "build_date" : "2020-02-06T00:09:00.449973Z",

                "build_snapshot" : false, "lucene_version" : "8.4.0",

                "minimum_wire_compatibility_version" : "6.8.0",

               "minimum_index_compatibility_version" : "6.0.0-beta1"

     },

     "tagline" : "You Know, for Search"

}