VMware Update Manager (VUM) Fails To Load Within vSphere Web Client

I recently upgraded my lab VCSA from version 6.5 (Build Number 5705665) to version 6.5 U1 (Build Number 6671409).  After the upgrade I noticed that VMware Update Manager was no longer working correctly.  Navigating around the various VUM pages I received the same consistent error message.

interface com.vmware.vim.binding.integrity.VcIntegrity is not visible from class loader

VUM management page

VUM Tab within an ESXi host

Checking the vCenter services within Administration > System Configuration they all appeared Up and Running.  Though all services were running I never the less restarted the VMware Update Manager service which unfortunately didn’t help.  I also tried restarting a few other services without much success.  So rather than just continuing to randomly restart services I decided to take a tougher approach and restart all services from the CLI.

After the stopping and starting of all vCenter services, which took a few minutes, VUM was back up and running again within the vSphere Web Client.  While this was a fairly drastic step to take, so would have been rebooting the vCenter server, which I’m glad I managed to avoid.

I’ve previous written about restarting vCenter services.  The process is quite simple.   First connect up to the CLI of the VCSA box.  Then run the below two commands.  Both the stopping and starting of services will take a few minutes each.  Once the services are restart the Web Client will take a further few minutes to fully start up and be accessible.  If all is successful Update Manager should be accessible once again.

Command> service-control --stop --all

Command> service-control --start --all

Restarting all the vCenter services like this is obviously a disruptive action.  Connectivity to vCenter will be dropped while the services restart.  Usually restarting all services on vCenter via the CLI is my last ditch attempt to resolve an issue before I attempt a reboot of the appliance.  While restarting the VCSA might have been the easiest thing to do to resolve this issue it’s not always necessary.

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