diff --git a/service/clusterd.lua b/service/clusterd.lua
index 677f84fa..8d340b70 100644
--- a/service/clusterd.lua
+++ b/service/clusterd.lua
@@ -5,14 +5,6 @@ local cluster = require "cluster.core"
 
 local config_name = skynet.getenv "cluster"
 local node_address = {}
-
-local function loadconfig()
-	local f = assert(io.open(config_name))
-	local source = f:read "*a"
-	f:close()
-	assert(load(source, "@"..config_name, "t", node_address))()
-end
-
 local node_session = {}
 local command = {}
 
@@ -37,6 +29,24 @@ end
 
 local node_channel = setmetatable({}, { __index = open_channel })
 
+local function loadconfig()
+	local f = assert(io.open(config_name))
+	local source = f:read "*a"
+	f:close()
+	local tmp = {}
+	assert(load(source, "@"..config_name, "t", tmp))()
+	for name,address in pairs(tmp) do
+		assert(type(address) == "string")
+		if node_address[name] ~= address then
+			-- address changed
+			if rawget(node_channel, name) then
+				node_channel[name] = nil	-- reset connection
+			end
+			node_address[name] = address
+		end
+	end
+end
+
 function command.reload()
 	loadconfig()
 	skynet.ret(skynet.pack(nil))