kubernetes: [e2e failure] [sig-autoscaling] [HPA] Horizontal pod autoscaling (scale resource: CPU) [sig-autoscaling] [Serial] [Slow] ReplicaSet Should scale ...

/priority critical-urgent /sig autoscaling

This test case started failing recently and affects a number of jobs: triage report

This is affecting multiple jobs on the release-master-blocking testgrid dashboard, and prevents us from cutting 1.9.0-alpha.2 (kubernetes/sig-release#22). Is there work ongoing to bring this job back to green?

triage cluster b75045e2cb613e12dca1

/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/autoscaling/horizontal_pod_autoscaling.go:39
timeout waiting 15m0s for 5 replicas
Expected error:
    <*errors.errorString | 0xc4202cafe0>: {
        s: "timed out waiting for the condition",
    }
    timed out waiting for the condition
not to have occurred
/go/src/k8s.io/kubernetes/_output/dockerized/go/src/k8s.io/kubernetes/test/e2e/autoscaling/horizontal_pod_autoscaling.go:128

Suspect range from gci-gce-serial: https://github.com/kubernetes/kubernetes/compare/060b4b8b8...51244eb0f

Suspect range from gci-gke-serial: https://github.com/kubernetes/kubernetes/compare/b1e2d7a9d...82a52a901