After polling operation status is "DONE" check for errors
The code polls the operation to see when it is done: https://gitlab.developers.cam.ac.uk/uis/devops/tools/gcp-sql-backup/-/blob/master/gcpsqlbackup/init.py#L369
Despite status being "DONE" there may still be errors. Check for these to help show that the db export failed.
Edited by Robin Goodall