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).

I like VM Ware very much……its a very good official software and too proffessional
hi,
i am not clear how to fix it.
Does this need to be done on database portion or how?
Yes the steps will have to be done on the DB.
Or you can use the SQL comman line too.