Could not create console connection to certain VMs either through vSphere client or web client with Error message: Unable to connect to MKS: A general system error occurred: Internal error
After investigating some more it was only VMs on two of the hosts in a four host cluster. Enabled SSH on one of the affected hosts to restart mgmt services but got error message "Network error: Connection refused". Same on the other affected host but could connect with SSH to the other hosts with no issue.
Tried from vCenter server but same result. Rebooted vCenter server but same result.
Logged on to console session on both dodgy hosts and did management services restart - still cannot ssh to them and still cannot do a console session to VMs, however error message changed to Error Message: Unable to connect to server IPAddress:902
Logged on to shell and did a vdf -h but no issues with full root ramdisk or anything obvious.
Also cannot vmotion anything off the affected hosts and would prefer not to have to shut doen the VMs (which appear to be working fine) so any ideas or pointers please? Will log with VMWare support in the morning but like to fix myself if possible.