Nodejs application Error: bind EADDRINUSE when use pm2 deploy

Question

Express application deploy with pm2

database is mongodb

when run app with command:

NODE_ENV=production pm2 start app.js -i max

aften has Error: bind EADDRINUSE, this is logs, when error,

[app err (l0)] js:1073:26 [app err (l1)]     at Object.30:1 (cluster.js:587:5) [app err (l2)]     at handleResponse (cluster.js:171:41) [app err (l3)]     at respond (cluster.js:192:5) [app err (l4)]     at handleMessage (cluster.js:202:5) [app err (l5)]     at process.EventEmitter.emit (events.js:117:20) [app err (l6)]     at handleMessage (child_process.js:318:10) [app err (l7)]     at child_process.js:392:7 [app err (l8)]     at process.handleConversion.net.Native.got (child_process.js:91:7)Error: bind EADDRINUSE [app err (l9)]     at errnoException (net.js:901:11) [app err (l10)]     at net.js:1073:26 [app err (l11)]     at Object.31:1 (cluster.js:587:5) [app err (l12)]     at handleResponse (cluster.js:171:41) [app err (l13)]     at respond (cluster.js:192:5) [app err (l14)]     at handleMessage (cluster.js:202:5) [app err (l15)]     at process.EventEmitter.emit (events.js:117:20) [app err (l16)]     at handleMessage (child_process.js:318:10) [app err (l17)]     at child_process.js:392:7 [app err (l18)]     at process.handleConversion.net.Native.got (child_process.js:91:7) 

This causes app is slow, How to solve this problem, thanks very much

Answer 1

I don't know the port used by your application. It depends on your code. In this example, I will assume the port is 3000.

You need to verify if the port is already took on your system. To do that:

• On linux: sudo netstat -nltp | grep 3000
• On OSX: sudo lsof -i -P | grep 3000

If you have a result, you need to kill the process (kill <pid>).

You should check if pm2 list returns 0 process. In addition, when you do a pm2 stopAll, the socket is not released. Don't forget to do a pm2 kill to be sure the daemon is killed.

$ pm2 kill Daemon killed