Hi,
Yesterday we entounter an issue that VC has lots of alert about host . events shows that host connecion lost not respond. but restored normall immediately.
we first thought that if has a short network outage was raised during the triggerd alert period. But network team definited sure that there is no any problem related network . so we foucsd on issue between vCenter and ESXi if has any problem. below is detail info
VC version ：5.5
ESXi version:5。5
issue time：UTC +0 8:47 20th July 2017
event: VC has lots of alert : alarm.HostConnectionStateAlarm event: host connection lost status=not respond. restored normall immediately.
I also checked vpxd vpxa vmkernel,hostd log files and actually not found any value info about host connection lost.
we sure that we have taking a snapshot for VC during that time(issue time)
I don't know if take a snapshot for vC caused ESXi host lost connection. (this VC connected hundreds of host. but only dozens of host happened host connection lost)
anybody if have an idea or methond to investigate this issue. Any suggestion provided will be appreciate . thanks for you in advance.