why my zabbix2.2.6 doesn't show latest data

[cookiewl19]

my zabbix server2.2.6 doesn't shou latest data currently,as the picture

it show nothing while I wait for a long time, perhapes 1hour or more.

Anyone can Help me to solve it?

the ENV is mysql+redhat+httpd

Thanks a lot

[tchjts1]

https://www.zabbix.com/forum/showthread.php?t=46270