In a previous blog entry I posted about how to restart the VMware management agents in the event that you could not connect via the Infrastructure Client. I have found however this does not always work and sometimes one has to get a bit more involved to regain control of a non responsive host.
After restarting the management agents within dcui from the ssh prompts sometimes you will find that the host is still unresponsive. You may also observe the following.
Before our restart in DCUI
Notice none of the PID's changed?
In order to get the host responding again to our Infrastructure client we have to kill off these processes with and restart the hostd process. After killing the processes and restarting hostd you should be able to connect again with the infrastructure client. If you don't have ssh enabled on your host you can also do this from the host console.
kill -9 PID#