// https://github.com/kubernetes/kubernetes/issues/88355

	// Below, vx is a volume name, and nx is a node name.

	// Operation sequence:
	// opZ(v0) starts (operates on a different volume from all other operations)
	// op1(v1, n1) starts
	// op2(v1, n2) starts
	// opZ(v0) ends with success
	// op2(v1, n2) ends with an error (exponential backoff should be triggered)
	// op1(v1, n1) ends with success