Harness outage, 29 September 2026

CI Linux Cloud VM Networking issues - intermittent

Started
Resolved
29 Sept 2026, 22:01 UTC (after 3 h 15 min)
Impact
Minor
Affected
Continuous Integration Enterprise(CIE) - Linux Cloud Builds

Last update from Harness

### Summary Between approximately **11:37 AM and 3:01 PM PDT \(18:37-22:01 UTC\) on September 29, 2026**, customers using Harness CI self-hosted Linux cloud runners in **prod1/prod2 \(us-west1\)** experienced intermittent networking failures during pipeline execution - primarily Git/network timeouts when fetching source code. **Root Cause** This was primarily due to saturation of our NAT which was futher exacerbated by a temporary cloud provider compute capacity, preventing new VM provisioning there. ### Impact * Customers running self-hosted Linux CI builds in us-west1 saw **intermittent build/pipeline failures**, not a full outage. * Observed customer-facing errors included Git fetch...

2 Oct 2026, 22:40 UTC

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Other Harness incidents

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  2. Degraded performance in UI execution graph in prod3

  3. Prod1: Intermittent issue with IACM stages in some pipelines

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  6. Prod2 Pipelines with verify step failing intermittently

  7. Single Customer: IaCM pipeline executions failing intermittently in Prod 1

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