i use zabbix6.0LTS to moniter esxi6.7,and i change some settings on exsi about syslog to send the esxi log to my syslog server(also it is a zabbix server)
i only set this key "Syslog.global.logHost" and the firewall rules on esxi
and i have never chang the config for zabbix_server
but i find this thing in log per minute :"vmware events collector returned empty result"
i don't know why it happend,can anyone help me?

this is all the setting about vmware in zabbix server config:
VMwareFrequency=60
VMwarePerfFrequency=60
VMwareCacheSize=32M
VMwareTimeout=120
VMwareFrequency=60
VMwarePerfFrequency=60
VMwareCacheSize=32M
VMwareTimeout=120