node.js error message events.js:183 throw er; // Unhandled 'error' event

Question

Playing around Microsoft\'s botframework, when I try to run the app.js file, which is the main file of the bot, the first time is fine, after I close the bot emulator, and a

Answer 1

faced with the same issue

try to watch install watchman or upgrade it.

  brew install watchman

  brew upgrade watchman

Answer 2

Find the process that is using the port and kill it.

Assuming the server port is 8000.

1) C:> netstat -aon | findstr 8000

This command will return the Process ID (PID).

2) C:> taskkill /F /PID 7848

This command will kill the Process by PID.

Answer 3

I solved the issue using this command in my terminal on Linux.

rm -rf node_modules
rm package-lock.json yarn.lock
npm cache clear --force
npm install

Answer 4

The port you are listening to is already being listened by another process.

When I faced to this error I killed the process using Windows PowerShell (because I used Windows)

1. open the windows powershell
2. type ps and then you can get list of processes
3. find the process named node, and note the Id
4. type Stop-process <Id>

I think that it is help for windows users.

Answer 5

I also got the same problem and tried many ways but finally got this ,this work well

npm install ws@3.3.2 --save-dev --save-exact

refer to this link for more clarifications https://github.com/ionic-team/ionic-cli/issues/2922

Answer 6

I did also face the same problem. Installing of npm install ws@3.3.2 --save-dev --save-exact was not fix this. Later I came to know that there is an another website hosted by IIS in the same port where I configured for Node JS express server. Stopping of IIS website can get rid out of this issue.