Problem description
VMware backup job fails with the following error:
An error occurred while quiescing the virtual machine.
The error is encountered despite of the following verifications:
Output of the command
Vssadmin list writersshows WMI, ASR, System writers are timed out.Restart of the VSS service, gives the same result.
VMware tools are also updated.
Server is rebooted.
Cause
This is a known issue with VMware for Windows 2008 servers
Review the VMware KB for more information.
Traceback
Error Code: VMWARE_VMOMI1 is logged under Phoenix.log.
Event viewer of the Virtual Machine server shows Event ID – 8193
/var/log/Phoenix/Backup/<backupsetId>/Phoenix.log
"agents/vmware/vmwareAgent.py", line 4210, in do_snapshot\n File "agents/vmware/vSphereAdapter.py", line 1094, in create_snapshot\nSyncError: An error occurred while quiescing the virtual machine. Please retry the backup/restore again. (#100060001 : vim.fault.ApplicationQuiesceFault) (Error Code : VMWARE_VMOMI1)\n', 'error_code': 4295360513, 'error_msg': 'An error occurred while quiescing the virtual machine. Please retry the backup/restore again.'}]
Event Viewer shows
Event id - 8193
IOCTL_DISK_SET_SNAPSHOT_INFO(\\.\PHYSICALDRIVE1) fails with winerror 1168. hr = 0x80070490, Element not found.
Resolution
Disable the Enable VMware tools quiescing option from the backup policy for that virtual machine. For more information, see Update a backup policy.
📝 Note
If the same policy is applied for other virtual machines, it will affect all the servers.