hi：
My env is etcd server:3.2.9 and go client:3.2.9. Use user password auth.
I meet a problem. When I restart a etcd server，the watch channel closed，and I retry to watch without create a new client，the watch cannot success。Here is code：
`
func() ProcessWatch(wc WatchChan) {
for resp := range wc {
if resp.Canceled {
log.Log(resp.Err())
}
....
}
//retry a new watch
newWc := Watch(...)
go ProcessWatch(newWc)
}
`
1：When the wc closed, the resp.Canceled is not true, so can not log resp.Err().
2: The retry watch will fail, then the retry watch will always try.
Here is tcpdump result:
The long link is alive，but there is PermissionDenied Error。
hi：
My env is etcd server:3.2.9 and go client:3.2.9. Use user password auth.
I meet a problem. When I restart a etcd server，the watch channel closed，and I retry to watch without create a new client，the watch cannot success。Here is code：
Here is tcpdump result:
The long link is alive，but there is PermissionDenied Error。