diff --git a/TODO.MD b/TODO.MD
index 357d77c94..2851f5b60 100644
--- a/TODO.MD
+++ b/TODO.MD
@@ -50,6 +50,11 @@
 1. grpool增加支持阻塞添加任务接口；
 1. gdb.Model在链式安全的对象创建中增加sync.Pool的使用；
 1. 增加g.Table快捷方法以方便操作数据表，但是得考虑后续模型操作设计，特别是脚手架的模型管理；
+1. 改进ghttp分组路由中对hook的支持方式，以便格式与BindHookHandler统一；
+
+
+
+
 
 # DONE
 1.  gconv完善针对不同类型的判断，例如：尽量减少sprintf("%v", xxx)来执行string类型的转换；
diff --git a/g/database/gdb/gdb.go b/g/database/gdb/gdb.go
index c9235e012..d2236c0f2 100644
--- a/g/database/gdb/gdb.go
+++ b/g/database/gdb/gdb.go
@@ -170,7 +170,7 @@ var (
 // which is DEFAULT_GROUP_NAME in default.
 func New(name ...string) (db DB, err error) {
 	group := configs.defaultGroup
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		group = name[0]
 	}
 	configs.RLock()
diff --git a/g/database/gredis/gredis.go b/g/database/gredis/gredis.go
index bac5a85b6..3f5dbdc9d 100644
--- a/g/database/gredis/gredis.go
+++ b/g/database/gredis/gredis.go
@@ -110,7 +110,7 @@ func New(config Config) *Redis {
 // it returns a redis instance with default group.
 func Instance(name ...string) *Redis {
 	group := DEFAULT_GROUP_NAME
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		group = name[0]
 	}
 	v := instances.GetOrSetFuncLock(group, func() interface{} {
diff --git a/g/frame/gins/gins.go b/g/frame/gins/gins.go
index 1acbf8c14..f5c0221c8 100644
--- a/g/frame/gins/gins.go
+++ b/g/frame/gins/gins.go
@@ -77,7 +77,7 @@ func Config(name ...string) *gcfg.Config {
 func Database(name ...string) gdb.DB {
 	config := Config()
 	group := gdb.DEFAULT_GROUP_NAME
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		group = name[0]
 	}
 	key := fmt.Sprintf("%s.%s", gFRAME_CORE_COMPONENT_NAME_DATABASE, group)
@@ -214,7 +214,7 @@ func parseDBConfigNode(value interface{}) *gdb.ConfigNode {
 func Redis(name ...string) *gredis.Redis {
 	config := Config()
 	group := "default"
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		group = name[0]
 	}
 	key := fmt.Sprintf("%s.%s", gFRAME_CORE_COMPONENT_NAME_REDIS, group)
diff --git a/g/net/ghttp/ghttp_server.go b/g/net/ghttp/ghttp_server.go
index f67e0fc68..419097fd5 100644
--- a/g/net/ghttp/ghttp_server.go
+++ b/g/net/ghttp/ghttp_server.go
@@ -192,7 +192,7 @@ func serverProcessInit() {
 // 单例模式，请保证name的唯一性
 func GetServer(name ...interface{}) *Server {
 	sname := gDEFAULT_SERVER
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		sname = gconv.String(name[0])
 	}
 	if s := serverMapping.Get(sname); s != nil {
diff --git a/g/net/ghttp/ghttp_server_router_group.go b/g/net/ghttp/ghttp_server_router_group.go
index be919e0d0..1b8a2d894 100644
--- a/g/net/ghttp/ghttp_server_router_group.go
+++ b/g/net/ghttp/ghttp_server_router_group.go
@@ -38,13 +38,13 @@ func (s *Server) Group(prefix ...string) *RouterGroup {
 
 // 获取分组路由对象
 func (d *Domain) Group(prefix ...string) *RouterGroup {
-	if len(prefix) > 0 {
-		return &RouterGroup{
-			domain: d,
-			prefix: prefix[0],
-		}
+	group := &RouterGroup{
+		domain: d,
 	}
-	return &RouterGroup{}
+	if len(prefix) > 0 {
+		group.prefix = prefix[0]
+	}
+	return group
 }
 
 // 执行分组路由批量绑定
diff --git a/g/net/ghttp/ghttp_server_session.go b/g/net/ghttp/ghttp_server_session.go
index 68a9c2264..c9838e137 100644
--- a/g/net/ghttp/ghttp_server_session.go
+++ b/g/net/ghttp/ghttp_server_session.go
@@ -43,14 +43,22 @@ func GetSession(r *Request) *Session {
 	}
 }
 
+// UpdateSession updates the session with custom map.
+func (s *Server) UpdateSession(id string, data map[string]interface{}) {
+	v := s.sessions.GetOrSetFuncLock(id, func() interface{} {
+		return gmap.NewStrAnyMap()
+	}, s.GetSessionMaxAge()*1000)
+	v.(*gmap.StrAnyMap).Sets(data)
+}
+
 // 延迟初始化
 func (s *Session) init() {
 	if len(s.id) == 0 {
 		s.server = s.request.Server
 		if id := s.request.Cookie.GetSessionId(); id != "" {
-			if data := s.server.sessions.Get(id); data != nil {
+			if v := s.server.sessions.Get(id); v != nil {
 				s.id = id
-				s.data = data.(*gmap.StrAnyMap)
+				s.data = v.(*gmap.StrAnyMap)
 				return
 			}
 		}
diff --git a/g/net/gtcp/gtcp_server.go b/g/net/gtcp/gtcp_server.go
index 1fe42377b..7e2b443a5 100644
--- a/g/net/gtcp/gtcp_server.go
+++ b/g/net/gtcp/gtcp_server.go
@@ -35,7 +35,7 @@ var serverMapping = gmap.NewStrAnyMap()
 // The parameter <name> is used to specify the TCP server
 func GetServer(name ...interface{}) *Server {
 	serverName := gDEFAULT_SERVER
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		serverName = gconv.String(name[0])
 	}
 	return serverMapping.GetOrSetFuncLock(serverName, func() interface{} {
diff --git a/g/net/gudp/gudp_server.go b/g/net/gudp/gudp_server.go
index e0d7733e2..47c91d5a2 100644
--- a/g/net/gudp/gudp_server.go
+++ b/g/net/gudp/gudp_server.go
@@ -32,7 +32,7 @@ var serverMapping = gmap.NewStrAnyMap()
 // 单例模式，请保证name的唯一性
 func GetServer(name ...interface{}) *Server {
 	serverName := gDEFAULT_SERVER
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		serverName = gconv.String(name[0])
 	}
 	if s := serverMapping.Get(serverName); s != nil {
diff --git a/g/os/gcfg/gcfg_instance.go b/g/os/gcfg/gcfg_instance.go
index ae7c9f0e8..9f5b7ee09 100644
--- a/g/os/gcfg/gcfg_instance.go
+++ b/g/os/gcfg/gcfg_instance.go
@@ -24,7 +24,7 @@ var (
 // The parameter <name> is the name for the instance.
 func Instance(name ...string) *Config {
 	key := DEFAULT_GROUP_NAME
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		key = name[0]
 	}
 	return instances.GetOrSetFuncLock(key, func() interface{} {
diff --git a/g/os/gview/gview_instance.go b/g/os/gview/gview_instance.go
index ebb075096..22b31be34 100644
--- a/g/os/gview/gview_instance.go
+++ b/g/os/gview/gview_instance.go
@@ -22,7 +22,7 @@ var (
 // The parameter <name> is the name for the instance.
 func Instance(name ...string) *View {
 	key := DEFAULT_INSTANCE_NAME
-	if len(name) > 0 {
+	if len(name) > 0 && name[0] != "" {
 		key = name[0]
 	}
 	return instances.GetOrSetFuncLock(key, func() interface{} {
diff --git a/geg/net/ghttp/server/session/session_redis.go b/geg/net/ghttp/server/session/session_redis.go
index bfd6164ce..b70f64edf 100644
--- a/geg/net/ghttp/server/session/session_redis.go
+++ b/geg/net/ghttp/server/session/session_redis.go
@@ -24,11 +24,8 @@ func RedisHandlerGet(r *ghttp.Request) {
 		if id == "" {
 			return
 		}
-		// 当内存中的SESSION存在时不需要读取Redis
-		if r.Session.Size() > 0 {
-			return
-		}
-		// SESSION不存在时，例如服务重启，自动从Redis读取并恢复数据
+		// 应用服务器一般是多个节点构成的集群，
+		// 当请求中带有SESSION ID时，自动从Redis读取并恢复数据。
 		value, err := g.Redis().DoVar("GET", id)
 		if err != nil {
 			panic(err)