Outage in Blacksmith
Service degradation in upstream GHCR registries
Resolved Minor
September 02, 2026 - Started 1 day ago
- Lasted about 2 hours
Incident Report
Summary AI Generated
Blacksmith experienced approximately 2 hours of degraded connectivity to GitHub's infrastructure, causing elevated error rates for GHCR registry pulls and slow or failing Git checkouts across EU West, EU Central, and US East regions. The issue stemmed from high TCP retransmit rates into GitHub's EU load balancer, consistent with an undeclared GitHub-side incident. Connectivity returned to normal around 15:00 UTC, and failed jobs can be successfully re-run.
We are currently observing higher rates of errors for the upstream GHCR registries which may indicate an undeclared GitHub incident. We are currently monitoring.
Components affected
Blacksmith Github → API RequestsTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
INVESTIGATING
1 day ago - at 09/02/2026 02:09PM
We are currently observing higher rates of errors for the upstream GHCR registries which may indicate an undeclared GitHub incident. We are currently monitoring.
INVESTIGATING
1 day ago - at 09/02/2026 02:20PM
We are seeing evidence that Git Checkouts are also affected by this. We are seeing high TCP retransmit rates into the EU GitHub loadbalancer. Checkouts in the EU West, EU Central, US East regions are affected.
MONITORING
about 23 hours ago - at 09/02/2026 03:43PM
Connections to [github.com](http://github.com) and [ghcr.io](http://ghcr.io) from our eu-west, eu-central, and us-east regions have returned to normal as of approximately 15:00 UTC, so checkouts are completing at normal speed and login failures to GitHub Container Registry have dropped to baseline levels. We are continuing to monitor, and re-running any jobs that failed during this period should succeed.
Latest Blacksmith outages
US West storage cluster degradation - about 22 hours ago
Requests to GitHub failing due to upstream incident - 16 days ago
Job adoption delays due to missed webhooks - 17 days ago
Storage degradation in us-west - 21 days ago
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