Master controllers pods in CrashLoopBackOff state

Issue

• 2 of 3 Master controllers pods in CrashLoopBackOff state
• Master controller pod logs shows panic: interface conversion: interface {} is nil, not []interface {}
• goroutine 160 [running]:github.com/openshift/origin/vendor/k8s.io/kubernetes/cmd/kube-controller-manager/app.applyOpenShiftConfigControllerArgs(0xc4207a29a0, 0xc421b46540, 0x1e17, 0x24f6)
• Tried restarting the master-controllers but still controller pods going in CrashLoopBackOff state