Sending list of active checks to

[davidv]

Hello all,

I get in the zabbix server log all the time the following messages:
Can you please let me know what I can do.

thanks and best regards,

David

19338:20091211:144544.188 Sending list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19339:20091211:144545.625 Sending list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19335:20091211:144545.654 Send list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19337:20091211:144546.619 Sending list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19338:20091211:144546.691 Sending list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19339:20091211:144548.476 Send list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19335:20091211:144549.148 Sending list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found
19336:20091211:144553.405 Sending list of active checks to [xxxxxxx] failed: host [xxxxxxx] not found

[js1]

http://www.zabbix.com/forum/showpost.php?p=50061&postcount=20

When you configure an agent to do active checks, the agent proactively connects to the first server listed listed in the Server directive of the agent config. To get active checks to work:

1. The Hostname sent by the agent must match the host name configured in the GUI.
2. The first Server listed must be the proxy/server assigned to monitor the host.

The messages you're seeing is basically the server or proxy saying it has no idea about the agent that's trying to contact it for active checks.

[davidv]

thanks for the information i will do the changes.


Best regards,

David

[sean]

Why does one need active checks?
The passive checks are defined on the server, and the server remotely queries each of them.
With active checks the client downloads the list of check to be done, carries them out and sends to the server, correct?
Thus active checks might be more efficient?

But is it not best to disable active checks by default?

[js1]

Why does one need active checks?
The passive checks are defined on the server, and the server remotely queries each of them.
With active checks the client downloads the list of check to be done, carries them out and sends to the server, correct?
Thus active checks might be more efficient?

But is it not best to disable active checks by default?

It really depends on the architecture of your Zabbix infrastructure. You could just as easily ask why run an Agent at all? One line of reasoning is the agent makes collecting some data much easier. It then follows, if you have the agent running anyway, why not have it actively collect data? It takes some load off of the server and proxy.

Also, some checks, like log file monitoring, requires active checks. So, if you're going to use Zabbix to monitor log files, you have to run an agent, and active checks has to be enabled.