Conditions
OS: Oracle Linux Server release 7.6
Agent: 6.0.39
The agent's Server and ServerActive lists contain several different Zabbix Servers, and the Zabbix proxy contains a single FQDN that cannot be resolved.
Replication time from the moment the "failed" FQDN appears in the list: from 20 minutes to 2 hours
Problem description: From 20 minutes to 2 hours after the "failed" FQDN appears in the agent lists, the agent stops sending data to other members of the list. Specifically, out of 20 passive metrics, only 2-3 are received at a less frequent interval than specified. The node availability indicator alternates between red and green, and monitoring does not function properly.