Resolved after 3 days, affecting Coveralls.io Web and Coveralls.io API, on September 26, 2025.
We are closing this incident after recent mitigations and a weekend without any reports. We continue to implement mitigations and infrastructure changes we believe will further reduce incidents of this error type.
Affected components
Update timeline
- monitoring Sep 26, 2025, 03:28 PM UTC
All systems operational. During our US overnight hours (PDT / GMT-7), we received additional reports of 504 timeout errors affecting coverage uploads. The issue has since been resolved, and we are actively monitoring for further occurrences. We have already implemented several mitigations over the past few weeks, and additional measures will be deployed today to further reduce the likelihood of these errors, particularly for our international customers. If you experience a 504 error, the most helpful details you can provide are: 1. A timestamp or timeframe of the error 2. Any Cloudflare Ray ID shown on the error page Please share these details in our public tracking issue here: https://github.com/lemurheavy/coveralls-public/issues/1824 These reports are invaluable as we continue to investigate and refine our mitigations.
- resolved Sep 29, 2025, 03:56 PM UTC
We are closing this incident after recent mitigations and a weekend without any reports. We continue to implement mitigations and infrastructure changes we believe will further reduce incidents of this error type.
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