no active checks on server [xx.xxx.xx.xx:10051]: host [host] not monitored

Question

I am using Zabbix Active Agent to monitor hosts over the network but getting "no active checks on server [xx.xxx.xx.xx:10051]: host [host1] not monitored." errors only in one host with same exact server/agent configuration as in other hosts. I have double/triple checked the hostname and other configurations but issue has not been resolved. I believe I must have broke something while working on Zabbix templates but not sure what I did. I noticed "cannot send list of active checks to "xx.xxx.xx.xxx": host [host1] not monitored" error in Zabbix server log. Please help.

Solution

The host is disabled.

As you say that you are not using Zabbix proxy and host seems to be enabled, possible reasons that mask the problem:

• you are comparing DNS, not host name
• host has visible name defined

Make sure to compare the name agent and server print in their logfiles with the Hostname field in the host properties. Keep in mind that it is case sensitive.

Comments

[user427751]

Hi @Richlv, Thanks for your response. The host in Zabbix Server Host Configuration page is enabled. I am not understanding what you meant by "The host is disabled Filler here". If you would not mind, could you elaborate more?

[Richlv]

Are you using Zabbix proxy to monitor this host or is it monitored directly by the server?

[user427751]

Hi @Richlv, I am using Zabbix Active Agent and directly monitored by the server, no proxy.

[Richlv]

Host is still likely disabled. Please show screenshot of host configuration.