503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x05683530] _serverNamespace = / action = Allow _port = 8309)

[Taimour]

• Connecting to the vSphere ESXi Web Client (https://esxi_fqdn.com/ui/#/login) fails.
• We see the following entry:

503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http16LocalServiceSpecE:0x05683530] _serverNamespace = / action = Allow _port = 8309)

[daphnissov]

What version of ESXi and what version of esx-ui?

[Taimour]

ESXi 6.5.

Client version: 1.21.0

[daphnissov]

Update your host client to the latest on the Fling site and try again.

[peetz]

This error most commonly occurs when the hostd daemon on the host has died.

You can check that by running the command

  /etc/init.d/hostd status

at the console.

You can restart the daemon with

  /etc/init.d/hostd start

If the issue persists check the log file

  /var/log/hostd.log

for related error messages.

Andreas

[Taimour]

hostd was started. I already checked that. I also restarted all services.

I ended up restarting the ESXi host. The issue was gone after the restart.

I uploaded the logs to the support and waiting their feedback.