diff --git a/servlet.go b/servlet.go
index 100ea75..068b203 100644
--- a/servlet.go
+++ b/servlet.go
@@ -34,7 +34,6 @@ type rpcServlet struct {
 
 	responseQueueChan chan *responseState
 
-	doneChan    chan<- error
 	conn        interface{}
 	serverCodec protocol.ServerCodec
 
@@ -48,17 +47,17 @@ func (s *rpcServlet) Context() ServletContext {
 
 func (s *rpcServlet) Start(parentCTX cuc.Context, conn interface{}, doneChan chan<- error) error {
 	if nil == s.sh {
-		panic("Servlet: servlet handler must be specified.")
+		return fmt.Errorf("RPC Servlet: servlet handler must be specified")
 	}
 	s.sh.Validate()
 
 	if nil == s.rwcSH {
-		panic("Servlet: servlet RWC handler must be specified.")
+		return fmt.Errorf("RPC Servlet: servlet RWC handler must be specified")
 	}
 	s.rwcSH.Validate()
 
 	if s.stopChan != nil {
-		return fmt.Errorf("Servlet: servlet is already running. Stop it before starting it again")
+		return fmt.Errorf("RPC Servlet: servlet is already running. Stop it before starting it again")
 	}
 	s.ctx = s.sh.ServletContext(parentCTX)
 
@@ -67,19 +66,18 @@ func (s *rpcServlet) Start(parentCTX cuc.Context, conn interface{}, doneChan cha
 		return err
 	}
 
-	s.doneChan = doneChan
 	s.conn = conn
 	s.serverCodec = sc
 
 	if err := s.sh.Init(s.ctx); nil != err {
-		logging.Logger().Panicf("Servlet: Initialization of servlet has been failed %v", err)
+		return fmt.Errorf("RPC Servlet: Initialization of servlet has been failed %v", err)
 	}
 	s.responseQueueChan = make(chan *responseState, s.sh.GetPendingResponses())
 
 	s.stopChan = make(chan struct{})
 
 	s.stopWg.Add(1)
-	go handleServlet(s)
+	go handleServlet(s, doneChan)
 
 	return nil
 }
@@ -100,7 +98,7 @@ func (s *rpcServlet) Send(method string, args ...interface{}) (err error) {
 
 func (s *rpcServlet) Stop() {
 	if s.stopChan == nil {
-		logging.Logger().Warnf("Server: server must be started before stopping it")
+		logging.Logger().Warnf("RPC Servlet: RPC Servlet must be started before stopping it")
 		return
 	}
 	close(s.stopChan)
@@ -113,17 +111,17 @@ func (s *rpcServlet) Stop() {
 	s.conn = nil
 	s.serverCodec = nil
 
-	logging.Logger().Infof("Servlet is stopped")
+	logging.Logger().Infof("RPC Servlet: RPC Servlet is stopped")
 }
 
-func handleServlet(s *rpcServlet) {
+func handleServlet(s *rpcServlet, doneChan chan<- error) {
 	var err error
 
-	logging.Logger().Infof("Servlet is started")
+	logging.Logger().Infof("RPC Servlet: RPC Servlet is started")
 
 	defer func() {
 		s.stopWg.Done()
-		s.doneChan <- err
+		doneChan <- err
 	}()
 
 	subStopChan := make(chan struct{})
@@ -148,38 +146,32 @@ func handleServlet(s *rpcServlet) {
 	}
 
 	if err != nil {
-		logging.Logger().Errorf("RPC Server: servlet error %v", err)
+		logging.Logger().Errorf("RPC Servlet: servlet error %v", err)
 	}
 }
 
 func handleReader(s *rpcServlet, stopChan chan struct{}, doneChan chan error) {
-	logging.Logger().Debugf("reader of Servlet is started")
+	logging.Logger().Debugf("RPC Servlet: Reader of Servlet is started")
 
 	var err error
 	defer func() {
-		logging.Logger().Debugf("reader of Servlet is stopped")
-
-		if r := recover(); r != nil {
-			if err == nil {
-				err = fmt.Errorf("RPC Server: Panic when reading request from client: %v", r)
-			}
-		}
+		logging.Logger().Debugf("RPC Servlet: Reader of Servlet is stopped")
 		doneChan <- err
 	}()
 
 	for {
 		if nil == s.conn {
-			err = fmt.Errorf("RPC Server: disconnected from client")
+			err = fmt.Errorf("RPC Servlet: Disconnected from client")
 			return
 		}
 
 		requestCodec, err := s.rwcSH.ReadRequest(s.ctx, s.serverCodec, s.conn)
 		if nil != err {
 			if err == io.ErrUnexpectedEOF || err == io.EOF {
-				err = fmt.Errorf("RPC Server: disconnected from client")
+				err = fmt.Errorf("RPC Server: Disconnected from client")
 				return
 			}
-			logging.Logger().Errorf("RPC Server: Cannot read request: [%s]", err)
+			logging.Logger().Errorf("RPC Servlet: Cannot read request: [%s]", err)
 			continue
 		}
 
@@ -188,7 +180,7 @@ func handleReader(s *rpcServlet, stopChan chan struct{}, doneChan chan error) {
 
 		select {
 		case <-stopChan:
-			err = fmt.Errorf("RPC Server: reading request stopped because get stop channel")
+			err = fmt.Errorf("RPC Servlet: Reading request stopped because get stop channel")
 			return
 		default:
 		}
@@ -196,16 +188,11 @@ func handleReader(s *rpcServlet, stopChan chan struct{}, doneChan chan error) {
 }
 
 func handleWriter(s *rpcServlet, stopChan chan struct{}, doneChan chan error) {
-	logging.Logger().Debugf("writer of Servlet is started")
+	logging.Logger().Debugf("RPC Servlet: Writer of Servlet is started")
 
 	var err error
 	defer func() {
-		logging.Logger().Debugf("writer of Servlet is stopped")
-		if r := recover(); r != nil {
-			if err == nil {
-				err = fmt.Errorf("RPC Server: Panic when writing response to client: %v", r)
-			}
-		}
+		logging.Logger().Debugf("RPC Servlet: Writer of Servlet is stopped")
 		doneChan <- err
 	}()
 
@@ -220,24 +207,24 @@ func handleWriter(s *rpcServlet, stopChan chan struct{}, doneChan chan error) {
 
 			select {
 			case <-stopChan:
-				err = fmt.Errorf("RPC Server: writing message stopped because get stop channel")
+				err = fmt.Errorf("RPC Servlet: Writing message stopped because get stop channel")
 				return
 			case rs = <-s.responseQueueChan:
 			}
 		}
 
 		if nil == s.conn {
-			err = fmt.Errorf("RPC Server: disconnected from client")
+			err = fmt.Errorf("RPC Servlet: Disconnected from client")
 			return
 		}
 
 		if nil != rs.requestCodec {
 			if err := s.rwcSH.WriteResponse(s.ctx, s.conn, rs.requestCodec, rs.result, rs.err); nil != err {
-				logging.Logger().Errorf("RPC Server: response error %v", err)
+				logging.Logger().Errorf("RPC Servlet: response error %v", err)
 			}
 		} else {
 			if err := s.rwcSH.WriteNotification(s.ctx, s.conn, s.serverCodec, rs.noti.method, rs.noti.args); nil != err {
-				logging.Logger().Errorf("RPC Server: notification error %v", err)
+				logging.Logger().Errorf("RPC Servlet: notification error %v", err)
 			}
 		}