Troubleshooting Azure VM Backup failures: “Snapshot VM sub task timed out” error

Here’s a quick tip for you in case you’re using Microsoft Azure Backup for infrastructure as a service (IaaS) and a scheduled VM backup fails with the following error message in the job error details in the Azure Portal:

Could not communicate with the VM agent for snapshot status – Snapshot VM sub task timed out.

There are four common causes for this error:

  • The VM does not have Internet access.
  • The Microsoft Azure VM agent installed in the VM is out of date (for Linux VMs).
  • The backup extension failed to update or load.
  • The snapshots status cannot be retrieved or the snapshots cannot be taken.

To read about the solutions for each of these, please see the following:

Azure VM Backup fails: Could not communicate with the VM agent for snapshot status – Snapshot VM sub task timed out

 

J.C. Hornbeck, Solution Asset PM
Microsoft Enterprise Cloud Group