I use Ubuntu 20.04, Nodemon 2.0.4, Node 14.9.0 and Express 4.17.1. Every time I save my code I get this error:
events.js:291
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE: address already in use :::3000
at Server.setupListenHandle [as _listen2] (net.js:1318:16)
at listenInCluster (net.js:1366:12)
at Server.listen (net.js:1452:7)
at Function.listen (/home/ubuntu/kopum/node_modules/express/lib/application.js:618:24)
at Object.<anonymous> (/home/ubuntu/kopum/app.js:37:5)
at Module._compile (internal/modules/cjs/loader.js:1075:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1096:10)
at Module.load (internal/modules/cjs/loader.js:940:32)
at Function.Module._load (internal/modules/cjs/loader.js:781:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
at internal/main/run_main_module.js:17:47
Emitted 'error' event on Server instance at:
at emitErrorNT (net.js:1345:8)
at processTicksAndRejections (internal/process/task_queues.js:80:21) {
code: 'EADDRINUSE',
errno: -98,
syscall: 'listen',
address: '::',
port: 3000
}
[nodemon] app crashed - waiting for file changes before starting...
And then I try to run this on terminal:
sudo lsof -i :3000
kill -9 {PID}
Then I restart the Nodemon by running nodemon app.js and everything's back to normal. But the EADDRINUSE is back again when I add some code and save it.
A simple fix that worked when I had a similar issue is to delay Nodemon's restart slightly:
nodemon --delay 500ms app.js
This seems to give a little time for ports to be correctly released.
Seems like nodemon does not correctly kill child-spawn processes before start;
Edit the scripts attribute in your package.json file and add a kill command to terminate any processes listening on your port before the server starts.
"scripts": {
"start": "npm run kill && nodemon app.js",
"kill": "kill -9 $(lsof -i :3000) &>/dev/null | exit 0"
}
try running npx kill-port 3000 after every save command
Related
when i run my nodejs project on port 3000, get following error:
Error: listen EACCES: permission denied :::3000
at Server.setupListenHandle [as _listen2] (node:net:1330:16)
at listenInCluster (node:net:1378:12)
at Server.listen (node:net:1465:7)
at Function.listen (F:\Projects\NodeJS\Nodejs start\Nodejs start\node_modules\express\lib\application.js:618:24)
at Object.<anonymous> (F:\Projects\NodeJS\Nodejs start\Nodejs start\app.js:34:5)
at Module._compile (node:internal/modules/cjs/loader:1103:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
at Module.load (node:internal/modules/cjs/loader:981:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
Emitted 'error' event on Server instance at:
at emitErrorNT (node:net:1357:8)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
code: 'EACCES',
errno: -4092,
syscall: 'listen',
address: '::',
port: 3000
Not only on port 3000, but also on any port, the program does not run, and the mentioned error occur.
for solving this problem, i run net stop winnat on CMD, i get:
The Windows NAT Driver service is not started.
for start the winnat, i run net start winnat , i get
The Windows NAT Driver service was start successfully.
But the problem was not solved.Is there any other way but to restart the system?
When reading an environment variable, you should convert it to a number.
Try adding parseInt() to the variable:
const port = parseInt(process.env.PORT) || 3000;
You can try On Windows systems, restarting the service "Host Network
Service" may resolve the issue.
or try to restart your computer more than one time
or try open CMD under admin rights and run :
net stop winnat
net start winnat
SO I made an EC-2 Server and I've installed node.js on it. Then, I connected it to port :3000. It was fine untill I noticed that the port was never closed. I had no idea it was still open and tried 'npm run start' multiple times. I just found out that it was alive so I got the PID through "lsof -i TCP:3000" and killed it using 'Kill -9 "PID#" and tried to run the port again. However, it gave me :
node:events:342
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE: address already in use :::3000
at Server.setupListenHandle [as _listen2] (node:net:1306:16)
at listenInCluster (node:net:1354:12)
at Server.listen (node:net:1441:7)
at Function.listen (/home/ec2-user/node_modules/express/lib/application.js:618:24)
at Object.<anonymous> (/home/ec2-user/index.js:12:5)
at Module._compile (node:internal/modules/cjs/loader:1109:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1138:10)
at Module.load (node:internal/modules/cjs/loader:989:32)
at Function.Module._load (node:internal/modules/cjs/loader:829:14)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)
Emitted 'error' event on Server instance at:
at emitErrorNT (node:net:1333:8)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
code: 'EADDRINUSE',
errno: -98,
syscall: 'listen',
address: '::',
port: 3000
}
So I searched if the port was open again, and it was still open with a different PID. I tried killing it over and over, but it kept showing up with a differnt PID.
If there is something worng or unclear with my question please tell me, I jsut started fiddling with EC2 and all this server things, so I don't know which informations are further required to solve this.
I solved it!!! I typed
killall5 -9
and killed everything and it stopped!
Good evening,
I have the following error and I have no idea what it means, i have googled and changed a few little bit but its very persistent. Is anyone able to offer me some help with the matter?
events.js:292
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE: address already in use :::5000
at Server.setupListenHandle [as _listen2] (net.js:1318:16)
at listenInCluster (net.js:1366:12)
at Server.listen (net.js:1452:7)
at Object.<anonymous> (/Users/danielwilstrop/Desktop/projects/live-chat-2/server.js:100:8)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
at internal/main/run_main_module.js:17:47
Emitted 'error' event on Server instance at:
at emitErrorNT (net.js:1345:8)
at processTicksAndRejections (internal/process/task_queues.js:80:21) {
code: 'EADDRINUSE',
errno: -48,
syscall: 'listen',
address: '::',
port: 5000
}
[nodemon] app crashed - waiting for file changes before starting...
This error is usually caused by a typo on your terminal.
Check if you typed the correct file name in your terminal and also check if the path to your file is correct.
Option 2: check if no other terminals are open in the background. kill all those other terminals, press Ctr+C then run your app again..
There is some other process already using port 5000 so, you are getting this error. To solve this there are two ways
Change the server port from 5000 to something else which port is available eg. 5555 in this file /Users/danielwilstrop/Desktop/projects/live-chat-2/server.js at line number 100 (as shown in the error)
Kill the process that is running on port 5000. Then run the server.js file.
For Linux or mac sudo lsof -ti tcp:5000 | sudo xargs kill
For windows run cmd with administrator privilages netstat -ano|findstr "PID :5000" take the process id from the output and then taskkill /pid <PROCESS_PID_USING_PORT_5000> /f
Firstly I run this command (npm ndb server.js) then a debugging chrome window appear and after this
Actually, I got these error when I am trying to debug in my code and I clicked on run script after that a debugging chrome window appear then it give these wired error.
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE: address already in use :::8080
at Server.setupListenHandle [as _listen2] (net.js:1279:14)
at listenInCluster (net.js:1327:12)
at Server.listen (net.js:1414:7)
at Function.listen (C:\Users\Abhishek kumar\natours\node_modules\express\lib\application.js:618:24)
at Object.<anonymous> (C:\Users\Abhishek kumar\natours\server.js:24:5)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
Emitted 'error' event at:
at emitErrorNT (net.js:1306:8)
at process._tickCallback (internal/process/next_tick.js:63:19)
at Function.Module.runMain (internal/modules/cjs/loader.js:834:11)
at startup (internal/bootstrap/node.js:283:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
The error is quite explicit :
Error: listen EADDRINUSE: address already in use :::8080
means that some program is already listening on port 8080 (and you have an extra hint : the ::: says that it's listening on broadcast host using IPv6).
If you're curious what program is listening on that port, you could try to navigate to http://localhost:8080 and see what's displayed. If nothing is displayed then it's not one of your web apps. Maybe you have an HTTP proxy running on your machine (I have recently come across a malware that ran mitmproxy on target machines on port 8080 to intercept all traffic).
On Mac or Linux you can use lsof to get more information on the program listening on that port.
The command you want is :
$ sudo lsof -i :8080
Run this command.
killall node
I am keep facing the below error when running the node server, but the code used to work properly before. Could any expert to resolve the issue?
Below is the error part of server.js
try {
app.listen(port, function(){
console.log('Server started on port'+port);
})
} catch (e) {
console.log('There was an error', e);
}
-------------------------------error---------------------------------------
PS C:\Users\User\WebstormProjects\myapp> nodemon server
[nodemon] 1.11.0
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node server app.js`
events.js:182
throw er; // Unhandled 'error' event
^
Error: listen EADDRINUSE :::3000
at Object.exports._errnoException (util.js:1024:11)
at exports._exceptionWithHostPort (util.js:1047:20)
at Server.setupListenHandle [as _listen2] (net.js:1319:14)
at listenInCluster (net.js:1367:12)
at Server.listen (net.js:1467:7)
at Function.listen (C:\Users\User\WebstormProjects\myapp\node_modules\express\lib\application.js:618:24)
at Object.<anonymous> (C:\Users\User\WebstormProjects\myapp\server.js:52:9)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
[nodemon] app crashed - waiting for file changes before starting...
Another app is already using port 3000. You can start it with another port.
You app is working, maybe you just started it twice, you can try skill node & start it again, or change your variable port by 3001