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Incident affecting Classroom

Incident began at 2025-06-09 22:07 and ended at 2025-06-10 00:00 (times are in Coordinated Universal Time (UTC)).

Date Time Description
Jun 10, 2025 4:02 AM UTC

Mini Incident Report

We apologize for the inconvenience this service disruption/outage may have caused. We would like to provide some information about this incident below. Please note, this information is based on our best knowledge at the time of posting and is subject to change as our investigation continues. If you have experienced impact outside of what is listed below, please reach out to Google Cloud Support using https://cloud.google.com/support or to Google Workspace Support using help article https://support.google.com/a/answer/1047213.

(All Times US/Pacific)

Incident Start: 9 June, 2025 15:07

Incident End: 9 June, 2025 17:00

Duration: 1 hour, 53 minutes

Affected Services and Features:

Google Classroom

Regions/Zones: Global

Description:

Google Classroom users experienced elevated latency for a duration of 1 hour and 53 minutes. The incident was triggered by a schema change applied to Google's globally distributed database. This schema change caused a surge in utilization across multiple zones, reaching the maximum utilization at 100%. As a result, a backend service relying on the database experienced a significant drop in availability and performance, impacting Classroom users. The incident was mitigated by rolling back the schema change.
Google will complete a detailed Incident report in the following days that will provide a full root cause.

Customer Impact:

Impacted users experienced increased latency while using Google Classroom.
Jun 10, 2025 12:12 AM UTC

Summary: Google Classroom experienced elevated latency issue

Description: The issue with Classroom has been resolved for all affected users as of Monday, 2025-06-09 17:00 PDT.

The issue was due to a recent change in the Spanner Database which prevented many users from being able to access Classroom. Our engineers have mitigated the issue by rolling back the recent release to the previous version.

We will publish an analysis of this incident once we have completed our internal investigation.

We thank you for your patience while we worked on resolving the issue.

Diagnosis: The impacted users experienced increased latency while using Classroom.

Workaround: None at this time.
Jun 9, 2025 11:51 PM UTC

Summary: Google Classroom experiencing elevated latency issue

Description: Mitigation work is currently underway by our engineering team.

We do not have an ETA for mitigation at this point.

We will provide more information by Monday, 2025-06-09 17:50 PDT.

Diagnosis: The impacted users would experience increased latency while using Classroom.

Workaround: None at this time.
Jun 9, 2025 11:28 PM UTC

Summary: Google Classroom experiencing elevated latency issue

Description: We are experiencing an Classroom beginning at Monday, 2025-06-09 15:00 PDT

Our engineering team continues to investigate the issue.

We will provide an update by Monday, 2025-06-09 17:00 PDT with current details.

We apologize to all who are affected by the disruption.

Diagnosis: The impacted users would experience increased latency while using Classroom.

Workaround: None at this time.