esxi6 - Bootbank cannot be found at path '/bootbank' host disconnect from vcsa

Hi All,

I experiencing an issue, a esxi 6 host was disconnected from my VCSA 6.0, but all VM in that host are working fine. DUCI was hang and I have not enable ssh. so I am no way just reboot esxi host. but one week later , another esxi host in same cluster occurred with the same issues.

after check vCenter log some messages findings:

- Issue detected on 10.1.xx.xxx in it-dc01: Virtual machine creation may fail because agent is unable to retrieve VM creation options from the host (N5Vmomi5Fault17HostCommunication9ExceptionE(vmodl.fault.HostCommunication)).

- Issue detected on 10.1.xx.xxx in it-dc01: Bootbank cannot be found at path '/bootbank'

- Issue detected on 10.1.xx.xxx in it-dc01: hostd detected to be non-responsive

- app1(VM) on host 10.1.12.200 in it-dc01 is disconnected.