Cornerstone incident

EU FRA SL1 Swimlane – System Latency

Resolved after 8 hours 33 minutes, affecting Response Time, on October 2, 2026.

postmortem Oct 19, 2026, 05:18 PM UTC

**Root Cause Analysis** **Incident Summary:** On Oct. 1st and again on Oct. 2nd, 2026, users across the FRA SL1 Production environment experienced issues accessing Learner Home. **Impact:** Affected users experienced difficulties loading Learner Home and increased response times, resulting in a degraded learning experience. **Root Cause:** The incident was caused by elevated resource utilization in the FRA SL1 Production environment. This affected the performance of backend application components, resulting in increased response times and intermittent errors. **Resolution:** The team implemented corrective configuration changes and took steps to improve resource utilization. Following these actions, Learner Home functionality recovered and the immediate incident was resolved. **Preventive Measures:** * The team has added additional capacity to the EU Production environment * Planned workload redistribution to improve resource utilization and balance the load across the environment * Monitoring will continue to identify potential performance degradation and help maintain service stability

Started
Oct 02, 2026, 02:34 PM UTC
Resolved
Oct 02, 2026, 11:07 PM UTC
Duration
8h 33m
Detected by Pingoru
Oct 02, 2026, 02:34 PM UTC

Affected components

Response Time

Update timeline

  1. investigating Oct 02, 2026, 02:34 PM UTC

    Clients with portals hosted in this swimlane may experience slower response times when accessing certain areas of the application. We are currently investigating the issue.

  2. investigating Oct 02, 2026, 04:14 PM UTC

    We are continuing to actively investigate the latency issue and are treating this as a top priority. Our teams remain engaged and are working to identify the cause and restore normal performance as quickly as possible. We will continue to provide regular updates as our investigation progresses.

  3. monitoring Oct 02, 2026, 06:27 PM UTC

    We have implemented a fix, and the latency has been resolved. We are closely monitoring the environment to ensure performance remains stable and the issue does not recur.

  4. resolved Oct 02, 2026, 11:07 PM UTC

    The CSOD Technology Team observed a performance degradation affecting this swimlane. After a period of monitoring we are considering the issue Resolved. The problem began at 7:46 AM Pacific Time and was resolved at 10:47 AM Pacific Time. During this time, clients with portals on this swimlane may have experienced slow performance or intermittent errors while accessing the application.

  5. postmortem Oct 19, 2026, 05:18 PM UTC

    **Root Cause Analysis** **Incident Summary:** On Oct. 1st and again on Oct. 2nd, 2026, users across the FRA SL1 Production environment experienced issues accessing Learner Home. **Impact:** Affected users experienced difficulties loading Learner Home and increased response times, resulting in a degraded learning experience. **Root Cause:** The incident was caused by elevated resource utilization in the FRA SL1 Production environment. This affected the performance of backend application components, resulting in increased response times and intermittent errors. **Resolution:** The team implemented corrective configuration changes and took steps to improve resource utilization. Following these actions, Learner Home functionality recovered and the immediate incident was resolved. **Preventive Measures:** * The team has added additional capacity to the EU Production environment * Planned workload redistribution to improve resource utilization and balance the load across the environment * Monitoring will continue to identify potential performance degradation and help maintain service stability

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