I'm running VMware ESXi on two Dell PowerEdge R610 servers, with a third server, a PowerEdge R410 running vCenter Server. We have an Essentials license.
In the past I used to be able to open vCenter Server, select a host, and open the Hardware Status tab to see the various sensors, fan speeds, etc.
Now, that no longer works. On each server, I get a popup message "An error occurred, please try again in another vSphere session." and I can't resolve the error. Whatever I try, 'Update', 'Reset sensors', rebooting vCenter, rebooting hosts, nothing helps. I always get that error.
When I connect the vSphere Client directly to an individual host I can see the Health Status just fine, on the Configuration tab of the host. Which leads me to believe the problem is with vCenter. The problem could have appeared after the 4.0 to 4.0u1 update, but I'm not sure since I only noticed it weeks later.
- vCenter version is 4.0.0 build 258672
- ESXi version is 4.0.0 build 261974
Update Manager shows all hosts are up-to-date.
I don't know what else to try. What can I do?