错误：在nodejs中监听EADDRINUSE

Question

I've created javascript build system in sublime using that

Then I run server using that code

var server = require('http');

function engine(request, response){
    response.writeHead(200,  {'Content-Type': 'text/plain'});
    response.end("Hello");
}

server.createServer(engine).listen(3000);

but when I'll make change and for example will change Hello to Hello World and refresh browser it doesn't make any sense and when I'm trying rerun (f7) it throws an exception

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: listen EADDRINUSE :::3000
    at Object.exports._errnoException (util.js:870:11)
    at exports._exceptionWithHostPort (util.js:893:20)
    at Server._listen2 (net.js:1231:14)
    at listen (net.js:1267:10)
    at Server.listen (net.js:1363:5)
    at Object.<anonymous> (C:\Users\gsiradze\Desktop\nodejs\script1.js:4:8)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
[Finished in 0.1s]

I know that it's because of 3000 port is in use but how can I stop that port an then run the new code?

I'm pretty new at node.js, so feel free to give any suggestion

Answer 1

How do you run the nodejs implementation?

You could try to use the package nodemon

npm install -g nodemon

Now you can start your node application by typing nodemon in the directory. If you change and save your file now, the server will automatically restart your server.

If you dont want to use nodemon, shut down the server with ctrl+c

Answer 2

server.createServer(engine).listen(3000);

that's where you say where port is located, you can change port to any other one.

To rerun your code, I take it you use console you can press ctrl+C to stop process and run it again with node nameOfYoursServerFile.js

Answer 3

使用lsof -w -n -i tcp:3000在3000上找到您的进程的PID是什么，然后，使用kill -9 PID切换PID并使用第一个命令返回的PID来kill -9 PID它。

Answer 4

You need to get the PID of node service
You can do that by running this command on your terminal
    ps aux | grep node
it will give you  id of running node process
and the you can use 
    kill -9 <id of node process>
to stop node process and then try again to run your node server 

Answer 5

Either Ctrl+C the foreground process or find your running process's ID by using pidof node and then killing it ( kill pid ). Even if you are running with forever or in the background some other way, this will work.