ALERT: vCenter Server Services hang on startup after upgrading to vCenter Server 5.1

VMware has become aware of an issue where:

After upgrading to vCenter Server 5.1, the VMware VirtualCenter Server service fails to start

The VMware VirtualCenter Server service will not successfully stop or start.

The final log in the vpxd.log file shows:

CoreDump: Writing minidump

You see a backtrace near the very bottom of the vpxd.log file which begins with the following:

2012-09-13T11:53:46.802+02:00 [04468 info 'vmmoVm' opID=SWI-c5103928] [VmMo::SetComputeCompatibilityDirty] vm vm-5345 is marked dirty

2012-09-13T11:53:46.786+02:00 [05112 warning 'win32vpxdOsLayer_win32' opID=SWI-56f04b9c] [VpxUnhandledException] Backtrace

For further information, updates, and resolution to this issue, refer to KB article: vCenter Server Services hang on startup after upgrading to vCenter Server 5.1 (2035623).

Courtesy of: http://blogs.vmware.com