Harness outage, 19 October 2026
Degraded performance on prod4
- Started
- Resolved
- 19 Oct 2026, 08:21 UTC (after 35 min)
- Impact
- Minor
- Affected
- Continuous Delivery - Next Generation (CDNG), Continuous Integration Enterprise(CIE) - Self Hosted Runners, Continuous Integration Enterprise(CIE) - Mac Cloud Builds, Continuous Integration Enterprise(CIE) - Windows Cloud Builds, Continuous Integration Enterprise(CIE) - Linux Cloud Builds, Security Testing Orchestration (STO), Infrastructure as Code Management (IaCM), Platform
Is this still happening?
No. Harness marked this incident resolved on 19 Oct 2026, 08:21 UTC, 35 min after it began.
Right now: Harness reports all systems operational. (as of 26 Oct, 03:47 UTC) Live Harness status
Last update from Harness
## **Summary** On October 19, 2026, between approximately 12:10 AM and 12:55 AM PDT, customers on Prod4 experienced errors and intermittent unavailability of Harness Pipelines services. Heavy pipeline executions drove a sharp rise in CPU and memory use on the pipeline service, and for a short period all service instances were unavailable. Harness engineering scaled the service both vertically and horizontally, which restored service. A fix for the underlying behavior is being rolled out. ## **Root Cause** On October 19th, high number of concurrent executions with very large execution graphs drove a sharp increase in cluster resources. The service stores and retrieves this full execution g...
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