zabbix-agent (aktiv) do not work

[JoeDeNoir]

Hi

Sorry, my English is terrible ...

Since last night, all Zabbix client unattainable. I get isolated reports of the agents. The active queries as icmp, smtp and web working. Only the passive checks zabbix-agent (active) not. In zabix server log (debug level 3) show only timeout while answering request. Also in debug level 4.
In debug level 4 overrides the Zabbix always all entries of the last checks?

Firewall, DNS, ICMP already checked. The firewall was turned off, but also brought no change.

After restart of zabbix server are all agents reachable for one run of check.

Has anyone an idea?

[JoeDeNoir]

Update:
I think the zabbix-server may can not many agents. When I disable the eventlogs, the agents are reachable.

Systems: 49
Windows systems: 11 with eventlog for application and sytems

[JoeDeNoir]

[ Resolved] zabbix-agent (aktiv) do not work

The Problem was the running agent on a Slave Node in a HA Host Standby Cluster form Astaro. Two Agents with same IP-Address used the same Networkconnection to the Zabbix Server.

Sorry for my stupidity ...