At 3:21 UTC on November 19, a limited number of sites experienced downtime lasting approximately 12 minutes. Affected sites returned a 500 HTTP status and displayed an error message stating that a connection to the database could not be established.
The error occurred due to a software crash. Specifically, the database cluster assigned to the affected sites had not been upgraded to MariaDB 10.3.19, which fixed several software bugs. Once the cluster was upgraded, the issue was resolved.
The Pressable systems team had tested MariaDB 10.3.19 on other clusters, but it had not resolved other crashes. However, given this incident, the Pressable systems team will be prioritizing upgrades of other clusters in our network.
If you have any questions or concerns about this incident, please reach out to the Pressable Helpdesk ( help[@]pressable.com ).