On June 16, 2025, the Kisi production API experienced a temporary degradation in availability. Investigation revealed that the root cause was an unexpected behavior in Google Cloud Platform’s (GCP) Cloud Run during an internal stack migration and service redistribution process managed by GCP.
According to GCP’s engineering response, a background migration and redistribution of workloads triggered a one-time instance restart in our Cloud Run service. This resulted in the application falling below its configured minimum instances temporarily, impacting our ability to serve requests reliably.
While the redistribution process is part of GCP’s infrastructure optimization efforts, the side effect of under-scaling was not communicated in advance and not within our control. GCP has confirmed that a fix has been rolled out to address this issue and prevent recurrence in similar scenarios.