diff --git a/server/server.go b/server/server.go
index 3041430..4500bd4 100644
--- a/server/server.go
+++ b/server/server.go
@@ -9,7 +9,9 @@ import (
 func New(_config *config.Config) *cssw.Server {
 
 	as := &servlet.AuthServlets{}
+	as.UseSession = true
 	ps := &servlet.ProbeServlets{}
+	ps.UseSession = true
 	ds := &servlet.DataServlets{}
 
 	sh := &ServerHandlers{
diff --git a/servlet/auth-servlet.go b/servlet/auth-servlet.go
index d198ef3..c36a0d9 100644
--- a/servlet/auth-servlet.go
+++ b/servlet/auth-servlet.go
@@ -5,7 +5,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"sync"
 
 	"github.com/valyala/fasthttp"
 
@@ -27,7 +26,6 @@ type AuthServlet interface {
 
 type AuthServlets struct {
 	ogrs.RPCServlets
-	sessions sync.Map
 }
 
 func (s *AuthServlets) Init(serverCtx server.ServerCtx) error {
@@ -132,21 +130,10 @@ func (s *AuthServlets) Handshake(servletCtx server.ServletCtx, ctx *fasthttp.Req
 
 func (s *AuthServlets) OnConnect(servletCtx server.ServletCtx, conn socket.Conn) {
 	s.RPCServlets.OnConnect(servletCtx, conn)
-
-	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
-	targetID := servletCtx.GetAttribute(og.SessionTargetIDKey)
-	if nil != sessionID && nil != targetID {
-		s.sessions.Store(sessionID.(string), ogrs.RetainSession(targetID.(string), servletCtx))
-	}
 }
 
 func (s *AuthServlets) OnDisconnect(servletCtx server.ServletCtx) {
 	s.RPCServlets.OnDisconnect(servletCtx)
-
-	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
-	if nil != sessionID {
-		s.sessions.Delete(sessionID.(string))
-	}
 }
 
 func (s *AuthServlets) handleSubscribe(serverCtx server.ServerCtx, subscribeChan <-chan *ogs.Message) {
@@ -162,7 +149,7 @@ LOOP:
 
 			switch msg.TargetType {
 			case ogs.PROBE:
-				sessions = s.getAuthSessions(msg.Targets)
+				sessions = s.GetSessions(msg.Targets)
 			default:
 				logging.Logger().Warnf("Subscriber: Unknown TargetType %s", msg.TargetType)
 				continue LOOP
@@ -181,20 +168,3 @@ LOOP:
 		}
 	}
 }
-
-func (s *AuthServlets) getAuthSessions(sessionIDs []string) []*ogrs.Session {
-	var sessions []*ogrs.Session
-
-	if nil == sessionIDs || 0 == len(sessionIDs) {
-		return sessions
-	}
-
-	for _, sessionID := range sessionIDs {
-		session, ok := s.sessions.Load(sessionID)
-		if ok {
-			sessions = append(sessions, session.(*ogrs.Session))
-		}
-	}
-
-	return sessions
-}
diff --git a/servlet/probe-servlet.go b/servlet/probe-servlet.go
index 5c83ff1..05b4c76 100644
--- a/servlet/probe-servlet.go
+++ b/servlet/probe-servlet.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"sync"
 
 	"github.com/valyala/fasthttp"
 
@@ -26,7 +25,6 @@ type ProbeServlet interface {
 
 type ProbeServlets struct {
 	ogrs.RPCServlets
-	sessions sync.Map
 }
 
 func (s *ProbeServlets) Init(serverCtx server.ServerCtx) error {
@@ -109,21 +107,10 @@ func (s *ProbeServlets) Handshake(servletCtx server.ServletCtx, ctx *fasthttp.Re
 
 func (s *ProbeServlets) OnConnect(servletCtx server.ServletCtx, conn socket.Conn) {
 	s.RPCServlets.OnConnect(servletCtx, conn)
-
-	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
-	targetID := servletCtx.GetAttribute(og.SessionTargetIDKey)
-	if nil != sessionID && nil != targetID {
-		s.sessions.Store(sessionID.(string), ogrs.RetainSession(targetID.(string), servletCtx))
-	}
 }
 
 func (s *ProbeServlets) OnDisconnect(servletCtx server.ServletCtx) {
 	s.RPCServlets.OnDisconnect(servletCtx)
-
-	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
-	if nil != sessionID {
-		s.sessions.Delete(sessionID.(string))
-	}
 }
 
 func (s *ProbeServlets) handleSubscribe(serverCtx server.ServerCtx, subscribeChan <-chan *ogs.Message) {
@@ -139,7 +126,7 @@ LOOP:
 
 			switch msg.TargetType {
 			case ogs.PROBE:
-				sessions = s.getProbeSessions(msg.Targets)
+				sessions = s.GetSessions(msg.Targets)
 			default:
 				logging.Logger().Warnf("Subscriber: Unknown TargetType %s", msg.TargetType)
 				continue LOOP
@@ -160,20 +147,3 @@ LOOP:
 		}
 	}
 }
-
-func (s *ProbeServlets) getProbeSessions(sessionIDs []string) []*ogrs.Session {
-	var sessions []*ogrs.Session
-
-	if nil == sessionIDs || 0 == len(sessionIDs) {
-		return sessions
-	}
-
-	for _, sessionID := range sessionIDs {
-		session, ok := s.sessions.Load(sessionID)
-		if ok {
-			sessions = append(sessions, session.(*ogrs.Session))
-		}
-	}
-
-	return sessions
-}