VMwareWolf.com who works on VMware’s Technical Support Team has highlighted a potential issue with ESX U3 disconnecting from the VirtualCenter under the following reported instances:
- ESX disconnects randomly from Virtualcenter
- ESX disconnects when performing VI Client tasks from Virtualcenter.
- Tasks randomly timeout after a long idle time
- "An error occurred communicating to the remote host" pops up.
He is raising a VMware Knowledge Base article regarding this which apparently should be out soon. Check out his blog posting here for more details.