Node / Express: EADDRINUSE, Address already in use - Kill server

Question

I have a simple server running in node.js using connect:

var server = require('connect').createServer();
//actions...
server.listen(3000);

In my code I have actual handlers, but thats the basic idea. The problem I keep getting is

EADDRINUSE, Address already in use

I receive this error when running my application again after it previously crashed or errors. Since I am not opening a new instance of terminal I close out the process with ctr + z.

I am fairly certain all I have to do is close out the server or connection. I tried calling server.close() in process.on('exit', ...); with no luck.

Answer 1

You can also go the command line route:

ps aux | grep node

to get the process ids.

Then:

kill -9 PID

Doing the -9 on kill sends a SIGKILL (instead of a SIGTERM). SIGTERM has been ignored by node for me sometimes.

Answer 2

First, you would want to know which process is using port 3000

sudo lsof -i :3000

this will list all PID listening on this port, once you have the PID you can terminate it with the following:

kill -9 {PID}

Answer 3

I hit this on my laptop running win8. this worked.

Run cmd.exe as 'Administrator':

C:\Windows\System32>taskkill /F /IM node.exe
SUCCESS: The process "node.exe" with PID 11008 has been terminated.