Node.js event.js:72 error

Question

I have a problem with my app. One year ago when I want to run the server everything was fine. Now I need to implement few things and when I start server in cmd used node app.js it throw this error pleas help

Serwer HTTP działa na pocie 3000

events.js:72
throw er; // Unhandled 'error' event
^ Error: Ready check failed: undefined
at RedisClient.on_info_cmd (C:\\Users\\Agnieszka\\Desktop\\TSW\\makao\\node_modules\\redis\\index.js:325:35)
at Command.callback (C:\\Users\\Agnieszka\\Desktop\\TSW\\makao\\node_modules\\redis\\index.js:373:14)
at RedisClient.flush_and_error (C:\\Users\\Agnieszka\\Desktop\\TSW\\makao\\node_modules\\redis\\index.js:129:25)
at RedisClient.connection_gone (C:\\Users\\Agnieszka\\Desktop\\TSW\\makao\\node_modules\\redis\\index.js:429:10)
at Socket. (C:\\Users\\Agnieszka\\Desktop\\TSW\\makao\\node_modules\\redis\\index.js:94:14)
at Socket.emit (events.js:117:20)
at _stream_readable.js:944:16
at process._tickCallback (node.js:442:13)

Answer 1

It's mostly because another app is using the port you are trying to use

Ganesh answered this well here https://stackoverflow.com/a/25369114/4151025

Hope it helps, else you would have to show some code