1.Create a dynamic pvc ebs
2.Create a pod using rc=1
apiVersion: v1
kind: ReplicationController
metadata:
  name: test11
spec:
  replicas: 1
  selector:
    app: nginx
  template:
    metadata:
      name: nginx
      labels:
        app: nginx
    spec:
      containers:
      - name: test11
        image: jhou/hello-openshift
        ports:
        - containerPort: 80
      volumes:
      - name: aws
        persistentVolumeClaim:
          claimName: ebs
3.After pod is running, stop node service
4.Edit rc from 1 to 0
5.Start node service
6.Check the /var/log/message, the "May 21 05:17:44 ip-172-18-14-199 atomic-openshift-node: I0521 05:17:44.874833    2742 kubelet_pods.go:1797] Orphaned pod "7d76ae0c-5cd6-11e8-8da3-0e704cd7fca4" found, but volumes not yet removed.  Reducing cpu to minimum" only happened once.

openshift v3.10.0-0.47.0
kubernetes v1.10.0+b81c8f8

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:1816

this issue still happens in 3.11.
Opened a new BZ to discuss it:

https://bugzilla.redhat.com/show_bug.cgi?id=1753160