not found

[hong]

The log has been flashing an error. Does this mean that the active mode fails?

The firewall and SELinux of server and agent have been closed, and 192.168.2.217 JKL has been added to the hosts file of server

I have only changed three places in the zabbix_agentd.conf file

Server=192.168.2.215

ServerActive=192.168.2.215

HostnameItem=system.hostname

Why not? Can someone help me

[LenR]

It may be that host JKL is not the same as jkl, case matters.

[hong]

The monitored hostname is JKL, and the hostname created on ZABBIX is JKL

[LenR]

But the error in image2 has jkl