Intermittent "Store is locked vnet" on azure-cni 1.0.7

[PatrickLang]

Is this an ISSUE or FEATURE REQUEST? (choose one): issue

---

Which release version?: 1.0.7

---

Which component (CNI/IPAM/CNM/CNS): CNI

---

Which Operating System (Linux/Windows): Windows (maybe Linux too)

---

For windows: provide output of "$(Get-ItemProperty -Path "C:\windows\system32\hal.dll").VersionInfo.FileVersion" 10.0.17134.112

---

Which Orchestrator and version (e.g. Kubernetes, Docker): Kubernetes v1.11

---

What happened:

I'm getting this intermittently in the logs with no apparent failures. Pods still start eventually and I'm not out of IPs

2018/07/11 22:47:05 [cni] Timed out on locking store, err:Store is locked.
2018/07/11 22:47:05 Failed to initialize key-value store of network plugin, err:Store is locked.

---

What you expected to happen:

No errors from CNI

---

How to reproduce it (as minimally and precisely as possible):
Deploy k8s cluster using acs-engine v0.19.2
Deploy 16 pods to a Windows node (https://raw.githubusercontent.com/PatrickLang/Windows-K8s-Samples/master/iis/iis-1803.yaml)

---

cc @CecileRobertMichon

[lowenna]

Suspect root cause is as described in #232 (comment)

[PatrickLang]

Closing, this hasn't been seen in a while.