diff --git a/examples/checkdeadloop.lua b/examples/checkdeadloop.lua
new file mode 100644
index 00000000..46f395c1
--- /dev/null
+++ b/examples/checkdeadloop.lua
@@ -0,0 +1,30 @@
+local skynet = require "skynet"
+
+local list = {}
+
+local function timeout_check(ti)
+	if not next(list) then
+		return
+	end
+	skynet.sleep(ti)	-- sleep 10 sec
+	for k,v in pairs(list) do
+		skynet.error("timout",ti,k,v)
+	end
+end
+
+skynet.start(function()
+	skynet.error("ping all")
+	local list_ret = skynet.call(".launcher", "lua", "LIST")
+	for addr, desc in pairs(list_ret) do
+		list[addr] = desc
+		skynet.fork(function()
+			skynet.call(addr,"debug","INFO")
+			list[addr] = nil
+		end)
+	end
+	skynet.sleep(0)
+	timeout_check(100)
+	timeout_check(400)
+	timeout_check(500)
+	skynet.exit()
+end)