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JavaScript Express Basics (2015) Developing Express Apps Like a Boss Interactive Debugging and Exploratory Programming

Kevin McNamara
Kevin McNamara
7,483 Points
Posted by Kevin McNamara
Kevin McNamara
7,483 Points

Getting error when running nodemon server

I have been getting this error :

Error: listen EADDRINUSE :::3000 at Object.exports._errnoException (util.js:1008:11) at exports._exceptionWithHostPort (util.js:1031:20) at Server._listen2 (net.js:1253:14) at listen (net.js:1289:10) at Server.listen (net.js:1385:5) at EventEmitter.listen (/Users/kevinmcnamara/express-dill/dill-website/node_modules/express/lib/application.js:617:24) at Object.<anonymous> (/Users/kevinmcnamara/express-dill/dill-website/src/app.js:21:5) at Module._compile (module.js:541:32) at Object.Module._extensions..js (module.js:550:10) at Module.load (module.js:458:32) [nodemon] app crashed - waiting for file changes before starting...

When i run nodemon src/app.js

When I try it with node src/app.js I get the same thing

I typed in the browser localhost:3000 and it is loading but never sends the response. Anyone know how to fix this?

boas dun
boas dun
Courses Plus Student 16,109 Points
boas dun
boas dun
Courses Plus Student 16,109 Points

Had this error: Error: listen EADDRINUSE :::5858 at Object.exports._errnoException (util.js:953:11) at exports._exceptionWithHostPort (util.js:976:20) at Agent.Server._listen2 (net.js:1253:14) at listen (net.js:1289:10) at Agent.Server.listen (net.js:1385:5) at Object.start (_debug_agent.js:21:9) at startup (node.js:86:44) at node.js:449:3

Fixed it by killing the process that was running on 5858 (googled a little bit)

First find what's running on (in my case) 5858, by typing:

ps aux | grep 5858

(Edit: A second time a got a wrong process id and the previous one didn't work, apparently:

sudo lsof -i :5858

also worked )

I got something like:

[username]      926   0.0  0.3  3694948  55760   ??  S     9:41PM   0:01.34 /usr/local/bin/node --debug-brk=5858 /Users/[username]/Desktop/THouse/express-basics/src/app.js

Apparently the first number is the PID (process ID), which i 'killed' (not sure if that's entirely safe though) with:

kill -9 926

After that nodemon --debug src/app.js worked without errors. Hope it works for you as well!

1 Answer

David Choi
David Choi
8,311 Points
David Choi
David Choi
8,311 Points

You can try the following commands:

killall -9 node

This command will kill the entire process

ps ax

And then you can check if it worked and try again