This was a very strange issue. vCenter would disconnect to all hosts causing the Host connection alert to activate. Just as quickly it would reconnect and everything would be fine. Unless your HA was configured! After contacting VMware support to no avail I finally figured it out. TIME! The time that the server that ran vCenter and the hardware clocks on the hosts was set to one source but vCenter was setting the hosts inside VMware to another time source. They were not the same time. This caused vCenter to restart its service to sync to the new time every 73 minutes. Basically the disconnect and reconnect was as fast as restarting the server service and it occurred exactly every 73 minutes!
I need a beer!!!!!!!
