elasticSearch5.4遭遇问题概略

1.root超级用户不能正常启动

由于elasticsearch2.0版本以后不能使用root来启动，所以需要创建一个普通用户来启动。 [root@bogon ~]# groupadd elasticsearch [root@bogon ~]# useradd elasticsearch -g elasticsearch [root@bogon ~]# chown -R elasticsearch.elasticsearch /usr/local/elk/elasticsearch-5.2.1 [root@bogon ~]# su - elasticsearch [elasticsearch@bogon ~]$ cd /usr/local/elk/elasticsearch-5.2.1/bin/ [elasticsearch@bogon bin]$ ./elasticsearch 123456 123456 由普通用户来启动，则可以正常启动服务。

2.ERROR: bootstrap checks failed

max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536] max number of threads [1024] for user [lishang] likely too low, increase to at least [2048] 解决：切换到root用户，编辑limits.conf 添加类似如下内容 vi /etc/security/limits.conf 添加如下内容: * soft nofile 65536 * hard nofile 131072 * soft nproc 2048 * hard nproc 4096

3.max number of threads [1024] for user [lish] likely too low, increase to at least [2048]

解决：切换到root用户，进入limits.d目录下修改配置文件。 vi /etc/security/limits.d/90-nproc.conf 修改如下内容： * soft nproc 1024 #修改为 * soft nproc 2048

4.max virtual memory areas vm.max_map_count [65530] likely 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： vm.max_map_count=655360 并执行命令： sysctl -p 然后，重新启动elasticsearch，即可启动成功。 5. system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

解决方法：在es配置中加入下面命令即可

bootstrap.system_call_filter: false