Agent unable to send active check to server

[Xyue]

Hi guys,

I'm trying to use agent to monitor server. Both agent and server are install in same machine. I keep getting below message from agent and server log

zabbix_agent.log
no active checks on server [127.0.0.1:10051]: host [zabsrv.xxx.com] not found


zabbix_server.log
cannot send list of active checks to [127.0.0.1]: host [zabsrv.xxx.com] not found


Have searched on forum and google and most of them advise is the hostname issue. I'm quite sure my hostname are correct. Below is the configuration.

/etc/zabbix/zabbix_agentd
ServerActive: 127.0.0.1
Hostname:zabsrv.xxx.com

[root@zabsrv zabbix]# hostname
zabsrv.xxx.com

[root@zabsrv zabbix]# netstat -ltn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:10050 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:10051 0.0.0.0:* LISTEN
tcp 0 0 :::10050 :::* LISTEN
tcp 0 0 :::10051 :::* LISTEN

Would appreciate if anyone can point out what caused it unable to work properly.
Thank you.