Do you get the next error in vSphere Web Client 6.x?:
Could not connect to one or more vCenter Server systems:
https://<IP-adres or FQDN>:443/sdk
If you open the URL, you get this error:
503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x00007f24400047c0] _serverNamespace = /sdk action = Allow _port = 8085)
Are you using the appliance? My problem was solved by the next solutions:
Source: https://communities.vmware.com/thread/547345
I seem to have fixed my issue by simply typing in a System name in the dialogue pictured below, instead of leaving it blank, which relied on the DHCP reservation/DNS entry in my router that worked under 6.0U2.
I've now survived 5 ESXi reboots, using ESXi host reboot, which was set to shut down all VMs gracefully, and to restart VCSA automatically.
I will continue to test and reboot, but first, a flight to catch, with my server onboard, of course ;-)
Here's how I was doing 6.0U2 or 6.5 installs, choosing DHCP, and leaving System name blank (but setting up a DHCP reservation for the VM's MAC address, and setting up a DNS name, by suspending the VCSA 6.5 appliance moments after the power up button appears, and grabbing the fresh VM's MAC, then resuming)
I don't use DDNS:
but figured I'd try to put in a System name anyway:
Five reboots later, I seem to be good, used to fail on first or second reboot/restart of VCSA.
More information: