diff --git a/client/client.go b/client/client.go
index c826db6..65a3f66 100644
--- a/client/client.go
+++ b/client/client.go
@@ -10,13 +10,16 @@ import (
 	logging "git.loafle.net/commons/logging-go"
 	"git.loafle.net/commons/rpc-go/protocol"
 	"git.loafle.net/commons/rpc-go/registry"
+	csc "git.loafle.net/commons/server-go/client"
 )
 
 var uint64Type = reflect.TypeOf(uint64(0))
 
 type Client struct {
+	Connector  csc.Connector
 	Codec      protocol.ClientCodec
 	RPCInvoker registry.RPCInvoker
+	Name       string
 
 	stopChan chan struct{}
 	stopWg   sync.WaitGroup
@@ -29,11 +32,19 @@ type Client struct {
 
 func (c *Client) Start(readChan <-chan []byte, writeChan chan<- []byte) error {
 	if c.stopChan != nil {
-		return fmt.Errorf("Client: already running. Stop it before starting it again")
+		return fmt.Errorf("%s already running. Stop it before starting it again", c.logHeader())
+	}
+
+	if nil == c.Connector {
+		return fmt.Errorf("%s Connector is not valid", c.logHeader())
+	}
+
+	if err := c.Connector.Validate(); nil != err {
+		return err
 	}
 
 	if nil == c.Codec {
-		return fmt.Errorf("Client: Codec is not valid")
+		return fmt.Errorf("%s Codec is not valid", c.logHeader())
 	}
 
 	c.stopChan = make(chan struct{})
@@ -46,7 +57,7 @@ func (c *Client) Start(readChan <-chan []byte, writeChan chan<- []byte) error {
 
 func (c *Client) Stop(ctx context.Context) error {
 	if c.stopChan == nil {
-		return fmt.Errorf("Client: must be started before stopping it")
+		return fmt.Errorf("%s must be started before stopping it", c.logHeader())
 	}
 	close(c.stopChan)
 	c.stopWg.Wait()
@@ -55,6 +66,10 @@ func (c *Client) Stop(ctx context.Context) error {
 	return nil
 }
 
+func (c *Client) logHeader() string {
+	return fmt.Sprintf("RPC Client[%s]:", c.Name)
+}
+
 func (c *Client) Send(method string, params ...interface{}) error {
 	rs, err := c.internalSend(false, nil, method, params...)
 	if nil != err {
@@ -93,7 +108,7 @@ func (c *Client) CallTimeout(timeout time.Duration, result interface{}, method s
 		return rs.clientError
 	case <-t.C:
 		rs.cancel()
-		return newError(method, params, fmt.Errorf("Timeout"))
+		return newError(method, params, fmt.Errorf("%s Timeout", c.logHeader()))
 	}
 }
 
@@ -119,12 +134,12 @@ func (c *Client) internalSend(hasResponse bool, result interface{}, method strin
 	default:
 		if !hasResponse {
 			releaseRequestState(rs)
-			return nil, newError(method, params, fmt.Errorf("Request Queue overflow"))
+			return nil, newError(method, params, fmt.Errorf("%s Request Queue overflow", c.logHeader()))
 		}
 		select {
 		case oldRS := <-c.requestQueueChan:
 			if nil != oldRS.doneChan {
-				oldRS.setError(fmt.Errorf("Request Queue overflow"))
+				oldRS.setError(fmt.Errorf("%s Request Queue overflow", c.logHeader()))
 				oldRS.done()
 			} else {
 				releaseRequestState(oldRS)
@@ -136,7 +151,7 @@ func (c *Client) internalSend(hasResponse bool, result interface{}, method strin
 			return rs, nil
 		default:
 			releaseRequestState(rs)
-			return nil, newError(method, params, fmt.Errorf("Request Queue overflow"))
+			return nil, newError(method, params, fmt.Errorf("%s Request Queue overflow", c.logHeader()))
 		}
 	}
 }
@@ -210,7 +225,7 @@ LOOP:
 			select {
 			case writeChan <- message:
 			default:
-				rs.setError(fmt.Errorf("Client: cannot send request"))
+				rs.setError(fmt.Errorf("%s cannot send request", c.logHeader()))
 				rs.done()
 				continue LOOP
 			}
@@ -250,7 +265,7 @@ LOOP:
 				// notification
 				notiCodec, err := resCodec.Notification()
 				if nil != err {
-					logging.Logger().Warnf("Client: notification error %v", err)
+					logging.Logger().Warnf("%s notification error %v", c.logHeader(), err)
 					continue LOOP
 				}
 
@@ -275,7 +290,7 @@ func (c *Client) handleResponse(resCodec protocol.ClientResponseCodec) {
 	id := reflect.ValueOf(resCodec.ID()).Convert(uint64Type).Uint()
 	_rs, ok := c.pendingRequests.Load(id)
 	if !ok {
-		logging.Logger().Warnf("Client: unexpected ID=[%d] obtained from server", id)
+		logging.Logger().Warnf("%s unexpected ID=[%d] obtained from server", c.logHeader(), id)
 		return
 	}
 	rs := _rs.(*requestState)
@@ -294,12 +309,12 @@ func (c *Client) handleNotification(notiCodec protocol.ClientNotificationCodec)
 	}()
 
 	if nil == c.RPCInvoker {
-		logging.Logger().Warnf("Client: received notification method[%s] but RPC Invoker is not exist", notiCodec.Method())
+		logging.Logger().Warnf("%s received notification method[%s] but RPC Invoker is not exist", c.logHeader(), notiCodec.Method())
 		return
 	}
 
 	_, err := c.RPCInvoker.Invoke(notiCodec)
 	if nil != err {
-		logging.Logger().Errorf("Client: invoking of notification method[%s] has been failed %v", notiCodec.Method(), err)
+		logging.Logger().Errorf("%s invoking of notification method[%s] has been failed %v", notiCodec.Method(), c.logHeader(), err)
 	}
 }
diff --git a/glide.yaml b/glide.yaml
index bd908b7..1df4534 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -4,3 +4,4 @@ import:
   subpackages:
   - encoding/json
   - reflect
+- package: git.loafle.net/commons/server-go