Resolved on September 21, 2026.
Between about 22:49 and 00:06 UTC on 21 September, AWS could not start new EC2 and Fargate containers in the us-east-1 region. This caused flow runs submitted in that window to crash. The issue has since been resolved and Prefect Serverless is operating normally.
Update timeline
- resolved Sep 21, 2026, 10:49 PM UTC
Between about 22:49 and 00:06 UTC on 21 September, AWS could not start new EC2 and Fargate containers in the us-east-1 region. This caused flow runs submitted in that window to crash. The issue has since been resolved and Prefect Serverless is operating normally.
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Amazon Web Services