问题1：
查看zabbix-server日志发现报错
tailf /var/log/zabbix/zabbix_server.log|grep 172.16.2.59
27671:20180107:100706.042 cannot send list of active checks to "172.16.2.59": host [HOSTNAME] not found
27670:20180107:100906.086 cannot send list of active checks to "172.16.2.59": host [HOSTNAME] not found
27670:20180107:101106.118 cannot send list of active checks to "172.16.2.59": host [HOSTNAME] not found
原因
查看对应主机配置文件，发现主机名未配置：
cat /etc/zabbix/zabbix_agentd.conf | grep Hostname
Hostname=HOSTNAME
解决办法：
1、修改hostname与web界面主机名一致
vim zabbix_agentd.conf
2、重启对应服务器的zabbix客户端
/etc/init.d/zabbix-agent restart
Shutting down Zabbix agent: [ OK ]
Starting Zabbix agent: [ OK ]
问题2
在zabbix-server上调用对应的键值报错
zabbix_get -s 172.16.2.59 -k zabbix_low_discovery[redis]
(Not all processes could be identified, non-owned process info
原因
查看/etc/sudoer文件，发现未进行免密配置
解决办法
修改对应服务器的/etc/sudoer文件，添加下边两行
zabbix ALL=(root) NOPASSWD:/bin/netstat, /app/jdk/bin/jps
Defaults:zabbix !requiretty
