I'm running Zabbix 6.2.7 (with postgress14) on Ubuntu 22.04.2 LTS (kernel version 5.15.0-67-generic) to monitor multiple hosts. However, after restarting the Zabbix server, all hosts become unavailable via SNMP and zabbix-agent after about 20 minutes. ICMP and VMware data are still being collected properly.
I've checked that the ports are correct and the firewall is not blocking them. Additionally, SElinux is disabled on the agents. I can also retrieve data from the agents using the zabbix_get utility from the server.
I've checked the logs at level 4, but I didn't find any significant error messages. I've also used tcpdump to monitor the traffic between the server and the agents, and I can see that packets are being sent and received. However, the agents are still showing as unavailable in the web interface.
The Zabbix server has 8 cores CPU, 32Gb RAM, SSD and I don't have any performance issues.
I have only one way to temporary resolve the problem is restart zabbix-server but after 15-30 minuts the problem get back.
I'd appreciate any suggestions on how to solve this problem.
I've checked that the ports are correct and the firewall is not blocking them. Additionally, SElinux is disabled on the agents. I can also retrieve data from the agents using the zabbix_get utility from the server.
I've checked the logs at level 4, but I didn't find any significant error messages. I've also used tcpdump to monitor the traffic between the server and the agents, and I can see that packets are being sent and received. However, the agents are still showing as unavailable in the web interface.
The Zabbix server has 8 cores CPU, 32Gb RAM, SSD and I don't have any performance issues.
I have only one way to temporary resolve the problem is restart zabbix-server but after 15-30 minuts the problem get back.
I'd appreciate any suggestions on how to solve this problem.