Zabbix故障现象： Zabbix agent on Zabbix server is unreachable for 5 minutes故障!

zabbix版本号：3.0.9

zabbix-检测中-事件 查看如下：

查看 more /var/log/zabbix/zabbix_agentd.log

20916:20170726:200017.136 the system time has been pushed back, adjusting active check schedule

 20916:20170727:150005.872 the system time has been pushed back, adjusting active check schedule

 20916:20170727:163106.058 the system time has been pushed back, adjusting active check schedule

经过查看zabbix_agentd.log日志可以看出是由于系统时间推迟不准导致zabbix报错。

解决措施：

#ntpdate pool.ntp.org

#hwclock --systohc

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Zabbix agent on Zabbix server is unreachable for 5 minutes故障!