Merge pull request #11754 from polyrabbit/unpermitted-watch

etcdserver: watch stream got closed if one watch request is not permitted

etcdserver/api/v3rpc/watch.go

@@ -255,9 +255,10 @@ func (sws *serverWatchStream) recvLoop() error {
 
 				select {
 				case sws.ctrlStream <- wr:
+					continue
 				case <-sws.closec:
+					return nil
 				}
-				return nil
 			}
 
 			filters := FiltersFromRequest(creq)