ExpressJS – throw er Unhandled error event

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I created expressjs application using the following commands:

express -e folderName
npm install ejs --save
npm install

When I run the application with: node app.js, I have the following errors:

events.js:72
    throw er; // Unhandled 'error' event
          ^
Error: listen EADDRINUSE
    at errnoException (net.js:884:11)
    at Server._listen2 (net.js:1022:14)
    at listen (net.js:1044:10)
    at Server.listen (net.js:1110:5)
    at Object.<anonymous> (folderName/app.js:33:24)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)

How to fix it?


Solution

You had run another server use the same port like 8080.

Maybe you had run node app in other shell, Please close it and run again.

You can check PORT no. is available or not using

netstat -tulnp | grep <port no>

Alternatively, you can use lsof:

lsof -i :<port no>

Source: StackOverflow.com

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