Esxi 6.5 is in not in connected state.
I restarted the management service.
I checked VMkernel log and noticed error related to local disk and vmbha0.
Web client does not launch on that esxi host and 503 error.
I have to plan a maintenance time to reboot this esxi.
I wonder whether anyone had this problem. If so what is the fix for this?
Do you have raid configured? if you do reboot your server and see if you have any disk error.