Backup of RDS may fail with the below error:
This is due to an AWS limitation.
If you would try to take a snapshot of a DB in stopped state manually in EC2, it would fail:
“Cannot create a snapshot
because the database instance <instance name> is not currently in the
available state. (Service: AmazonRDS; Status Code: 400; Error Code:
In order to overcome this error, please run backups on DBs
which are in the running state