We run Zabbix 6 / MariaDB 10.5 on Ubuntu 20.04
It was running for a months without single issues.
Today we patched the OS (and restarted the host (I shutdown mariadb and zabbix services before restart)
After host booted up, mariadb started but we started to get multiple errors like
I restored DB from backup but the problem is still here.
I switched to standby Zabbix DB server (also patched a few days ago and it uses the same database whicj is restored from active DB backup every night) and there is no problem on this server.
I still want to understand what happened. There was no change in config or any other change before host reboot.
Where should I look for the root cause of the problem?
It was running for a months without single issues.
Today we patched the OS (and restarted the host (I shutdown mariadb and zabbix services before restart)
After host booted up, mariadb started but we started to get multiple errors like
Code:
Jul 18 12:36:11 zabbixhost mariadbd[46528]: 2025-07-18 12:36:11 508 [Warning] Aborted connection 508 to db: 'zabbix' user: 'zabbix' host: 'zabbixhost' (Got an error reading communication packets)
I switched to standby Zabbix DB server (also patched a few days ago and it uses the same database whicj is restored from active DB backup every night) and there is no problem on this server.
I still want to understand what happened. There was no change in config or any other change before host reboot.
Where should I look for the root cause of the problem?