Notice of a Service Disruption on December 19, 2025

On Friday December 19, 2025, Seravo's server cluster fi-ellington experienced a network failure during a scheduled maintenance, affecting almost all sites on the cluster. The disruption was caused by a configuration failure within the cluster’s internal network connections and was noticed immediately and was fixed as quickly as it was possible. However, due to a software error, our recovery processes did not work as expected, causing a longer downtime of some sites in the cluster.

The disruption began at 6:09 (UTC+2) and ended at 7:49. Most of the sites in the server cluster were accessible again at 6:50.

We apologise for any inconvenience caused by the disruption.

Timeline (all timestamps UTC+2 (EET)

• 19.12.2025 6:09 Scheduled maintenance started.
• 19.12.2025 6:12 Problem detection: Several sites reported problems.
• 19.12.2025 6:12 Troubleshooting: Identified problem, started fixes
• 19.12.2025 6:50 At this point most of the sites recovered.
• 19.12.2025 7:04 Troubleshooting: Some sites still not yet recovered.
• 19.12.2025 7:49 Recovery: All sites operational.

Follow-Up Action

As a result of the incident, we at Seravo have identified the need for the following improvements:

• Further development of internal processes and tools to enable faster troubleshooting and recovering.
• Improvements to communication processes during an active service disruption.