diff --git a/lualib/localgroup.lua b/lualib/localgroup.lua
index 9ae09575..786f383f 100644
--- a/lualib/localgroup.lua
+++ b/lualib/localgroup.lua
@@ -17,7 +17,7 @@ function group.release(id)
 end
 
 skynet.init(function()
-	lg = skynet.call(".service","lua","group_local")
+	lg = skynet.uniqueservice("group_local")
 	assert(lg)
 end, "localgroup")
 
diff --git a/lualib/mcgroup.lua b/lualib/mcgroup.lua
index be566544..6ef440f4 100644
--- a/lualib/mcgroup.lua
+++ b/lualib/mcgroup.lua
@@ -28,8 +28,8 @@ function group.release(id)
 end
 
 skynet.init(function()
-	SERVICE = skynet.call("SERVICE", "lua", "group_mgr")
-	skynet.call(".service","lua","group_agent", SERVICE)
+	SERVICE = skynet.uniqueservice(true, "group_mgr")
+	skynet.uniqueservice("group_agent", SERVICE)
 end, "mcgroup")
 
 return group
diff --git a/lualib/redis.lua b/lualib/redis.lua
index 25cd5373..1b0e22ed 100644
--- a/lualib/redis.lua
+++ b/lualib/redis.lua
@@ -38,7 +38,7 @@ function redis.connect(dbname)
 end
 
 skynet.init(function()
-	redis_manager = skynet.call(".service", "lua", "redis-mgr")
+	redis_manager = skynet.uniqueservice("redis-mgr")
 end, "redis")
 
 return redis
diff --git a/lualib/skynet.lua b/lualib/skynet.lua
index 93928f0b..e1629bc6 100644
--- a/lualib/skynet.lua
+++ b/lualib/skynet.lua
@@ -297,6 +297,23 @@ function skynet.newservice(name, ...)
 	end
 end
 
+function skynet.uniqueservice(global, ...)
+	local t = 0
+	while true do
+		local handle
+		if global == true then
+			handle = skynet.call("SERVICE", "lua", ...)
+		else
+			handle = skynet.call(".service", "lua", global, ...)
+		end
+		if handle then
+			return handle
+		end
+		skynet.sleep(t)
+		t=t+1
+	end
+end
+
 local function group_command(cmd, handle, address)
 	if address then
 		return string.format("%s %d :%x",cmd, handle, address)
diff --git a/service/service_mgr.lua b/service/service_mgr.lua
index a174b3c2..74b799d9 100644
--- a/service/service_mgr.lua
+++ b/service/service_mgr.lua
@@ -5,6 +5,7 @@ local service = {}
 local function query(service_name, ...)
 	local s = service[service_name]
 	if s == nil then
+		service[service_name] = false
 		s = skynet.newservice(service_name, ...)
 		service[service_name] = s
 	end