Resolved after 36 minutes, on July 18, 2023.
Sigma Engineering has completed the postmortem of this incident. A Root Cause Analysis \(RCA\) is available on the Sigma Community site: [Postmortem for July 18, 2023 incident: Sigma outage for users using AWS/CloudFront US-EAST-1](https://community.sigmacomputing.com/t/postmortem-for-july-18-2023-incident-sigma-outage-for-users-using-aws-cloudfront-us-east-1/2497)
Update timeline
- resolved Aug 02, 2023, 01:26 AM UTC
Backdated incident: CloudFront outage US-EAST-1 Impacted Cloud Regions & Services: Sigma users accessing the application from the Eastern US were impacted, receiving 421 error pages when attempting to log in or access workbooks. Scheduled exports and API services were unaffected. Incident Start Time: July 18, 2023 16:37AM UTC Incident End Time: July 18, 2023 17:13AM UTC We have performed a root cause analysis (RCA) and have published the findings in a postmortem note on the Sigma Community site.
- postmortem Aug 02, 2023, 04:49 PM UTC
Sigma Engineering has completed the postmortem of this incident. A Root Cause Analysis \(RCA\) is available on the Sigma Community site: [Postmortem for July 18, 2023 incident: Sigma outage for users using AWS/CloudFront US-EAST-1](https://community.sigmacomputing.com/t/postmortem-for-july-18-2023-incident-sigma-outage-for-users-using-aws-cloudfront-us-east-1/2497)
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