After upgrade to Trident 20.07 failures are seen with the message "Unable to delete volume from backend"
Applies to
NetApp Trident 20.07
Issue
After upgrading Trident from an earlier version to 20.07 you begin to see the errors:
time="2020-10-05T06:58:13Z" level=error msg="GRPC error: rpc error: code = Unknown desc = backend tridentbackend is not Online or Deleting"
time="2020-10-05T06:58:15Z" level=error msg="Invalid backend state." expectedState=online/deleting state=failed
time="2020-10-05T06:58:15Z" level=error msg="Unable to delete volume from backend." backendUUID=0d879d26-8505-4fee-b99e-38de16feaf28 error="backend tridentbackend is not Online or Deleting" volume=pvc-20eae3aa-d76f-4973-92e5-a97c1a15c66b