Zabbix stops monitoring external hosts

[bmcclure]

For the past two days, I have had this problem:

I will log into Zabbix and notice that it thinks things are down that are not actually down. When I look further into it, I can see that no checks have been run on any external hosts for the past 16 hours (or any number of hours).

I am still getting checks for the client running on the same box as the Zabbix server, but not for any external clients. The way to resolve it seems to be restarting zabbix-server.

When I look in the zabbix-server.log, I see that entries for any of the external hosts just all of a sudden stop at one point. After that I see only warnings and errors for the host machine itself.

What could cause zabbix to stop checking all but the local client (127.0.0.1)? Monitoring can only be useful if I can trust it will continue to monitor without my intervention, so I'm hoping to figure this one out.

[mizaring]

Same problem here

Hi bmcclure,

Got the same problem with some hosts that zabbix stopped monitoring without reasons. On those hosts it still monitored 2 items (icmpping and tcp,xxxx) which doesn't use the zabbix agent process. Restarting the zabbix server resumed the data gathering. There was no error in the logs, so I can guess that something happen in the code that stop the server from getting the data via the agent.