Results 4 comments of Qitao Yu

@purpleidea @xiang90 As @mfycheng said, it always return `false` regardless of `equal` or `not equal` when the key doesn't exist and the `Compare Target` is `Compare_VALUE` . https://github.com/etcd-io/etcd/blob/9c2b88d783411d2e100385ca5ded21cd5796167c/etcdserver/apply.go#L448 ``` //...

Could we take https://github.com/kubernetes/kubernetes/issues/121937 into consideration to robust VolumeManager reconstruction? @jsafrane

https://github.com/globalsign/mgo/issues/267 he encountered the same problem.