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As described in this document, this may occur when an RDS maintenance period or RDS automatic backup period approaches.
Assuming that the backups themselves are managed correctly by AWS Backup, I thought it necessary to check the maintenance windows, etc.
https://repost.aws/knowledge-center/aws-backup-troubleshoot-scheduled-backup-plans
This can happen when the RDS maintenance window or the RDS automated backup window is approaching. In AWS Backup, RDS backups aren't allowed within an hour before the RDS maintenance window or the RDS automated backup window. Therefore, be sure that your backup plans for RDS databases are scheduled more than an hour apart from the RDS maintenance window and the RDS automated backup window. This time frame is extended to 4 hours for Amazon FSx.
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The maintenance window for one of the databases is set to
Monday, 00:00 UTC
with a duration of3 hours
. I don't think this should cause backups to fail every day. I can't seem to find the Backup Window settings in the RDS console as the backup is manged by AWS Backup as per the message in theBackup
section on theModify
page.Please use the following AWS CLI to check if the backup window is not configured on the RDS side. In rare cases, the contents of the management console and AWS CLI may differ, so it is a good idea to check.
https://awscli.amazonaws.com/v2/documentation/api/latest/reference/rds/describe-db-instances.html