diff --git a/client/service.go b/client/service.go
index eb59235..30bd3f8 100644
--- a/client/service.go
+++ b/client/service.go
@@ -357,8 +357,13 @@ func (svr *Service) ReloadConf(pxyCfgs map[string]config.ProxyConf, visitorCfgs
 	svr.cfgMu.Unlock()
 
 	svr.ctlMu.RLock()
-	defer svr.ctlMu.RUnlock()
-	return svr.ctl.ReloadConf(pxyCfgs, visitorCfgs)
+	ctl := svr.ctl
+	svr.ctlMu.RUnlock()
+
+	if ctl != nil {
+		return svr.ctl.ReloadConf(pxyCfgs, visitorCfgs)
+	}
+	return nil
 }
 
 func (svr *Service) Close() {
diff --git a/cmd/frpc/sub/root.go b/cmd/frpc/sub/root.go
index 997733c..f8d7eb1 100644
--- a/cmd/frpc/sub/root.go
+++ b/cmd/frpc/sub/root.go
@@ -115,6 +115,7 @@ var rootCmd = &cobra.Command{
 					return nil
 				}
 				wg.Add(1)
+				time.Sleep(time.Millisecond)
 				go func() {
 					defer wg.Done()
 					err := runClient(path)
diff --git a/pkg/util/vhost/http.go b/pkg/util/vhost/http.go
index b9dc32d..b720862 100644
--- a/pkg/util/vhost/http.go
+++ b/pkg/util/vhost/http.go
@@ -89,7 +89,7 @@ func NewHTTPReverseProxy(option HTTPReverseProxyOptions, vhostRouter *Routers) *
 		BufferPool: newWrapPool(),
 		ErrorLog:   log.New(newWrapLogger(), "", 0),
 		ErrorHandler: func(rw http.ResponseWriter, req *http.Request, err error) {
-			frpLog.Warn("do http proxy request error: %v", err)
+			frpLog.Warn("do http proxy request [host: %s] error: %v", req.Host, err)
 			rw.WriteHeader(http.StatusNotFound)
 			rw.Write(getNotFoundPageContent())
 		},