If I run a server with the port 80, and I try to use xmlHTTPrequest i get this error: Error: listen EADDRINUSE
Why is it problem for nodejs, if I want to do a request, while I run a server on the port 80? For the webbrowsers it is not a problem: I can surf on the internet, while the server is running.
The server is:
net.createServer(function (socket) {
socket.name = socket.remoteAddress + ":" + socket.remotePort;
console.log('connection request from: ' + socket.remoteAddress);
socket.destroy();
}).listen(options.port);
And the request:
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
sys.puts("State: " + this.readyState);
if (this.readyState == 4) {
sys.puts("Complete.\nBody length: " + this.responseText.length);
sys.puts("Body:\n" + this.responseText);
}
};
xhr.open("GET", "http://mywebsite.com");
xhr.send();
This question is related to
javascript
node.js
In below command replace your portNumber
sudo lsof -t -i tcp:portNumber | xargs kill -9
Error reason: You are trying to use the busy
port number
Two possible solutions for Windows/Mac
Windows
1. netstat -ano | findstr :4200
2. taskkill /PID 5824 /F
Mac
You can try netstat
netstat -vanp tcp | grep 3000
For OSX El Capitan and newer (or if your netstat doesn't support -p), use lsof
sudo lsof -i tcp:3000
if this does not resolve your problem, Mac
users can refer to complete discussion about this issue Find (and kill) process locking port 3000 on Mac
Windows
set PORT=5000
Mac
export PORT=5000
What really helped for me was:
killall -9 node
But this will kill a system process.
With
ps ax
you can check if it worked.
lsof -i:3000;
kill -9 $(lsof -t -i:3000);
// 3000 is a your port
// This "lsof -i:3000;" command will show PID
kill PID
ex: kill 129393
Error: listen EADDRINUSE means the port which you want to assign/bind to your application server is already in use. You can either assign another port to your application.
Or if you want to assign the same port to the app. Then kill the application that is running at your desired port.
For a node application what you can try is, find the process id for the node app by :
ps -aux | grep node
After getting the process id, do
kill process_id
This works for me (I'm using mac). Run this command
lsof -PiTCP -sTCP:LISTEN
This's going to display a list of ports that your syetem is using. Find the PID
that your node is running
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 17269 hientrq 16u IPv6 0xc42959c6fa30c3b9 0t0 TCP *:51524 (LISTEN)
node 17269 hientrq 19u IPv4 0xc42959c71ae86fc1 0t0 TCP localhost:1337 (LISTEN)
and run kill -9 [YOUR_PID]
On Debian i found out to run on port 80 you need to issue the command as root i.e
sudo node app.js
I hope it helps
I have the same problem too,and I simply close the terminal and open a new terminal and run
node server.js
again. that works for me, some time just need to wait for a few second till it work again.
But this works only on a developer machine instead of a server console..
In my case Apache HTTP Server was run on port 80 I solved it by issue the command as root
sudo killall httpd
Update
If Jenkin is installed and running on your Mac;
sudo lsof -i tcp:8080
sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist
The option which is working for me :
Run:
ps -ax | grep node
You'll get something like:
8078 pts/7 Tl 0:01 node server.js
8489 pts/10 S+ 0:00 grep --color=auto node
kill -9 8078
This happened to me because I had my server running in another Terminal window. Closing the connection solved the problem.
This error comes when you have any process running on a port on which you want to run your application.
how to get which process running on that port=> command: sudo netstat -ap | grep :3000
output : you will get the process information which is using that port
tcp 0 0 IPaddress:3000 : LISTEN 26869/node
Now you can kill that process sudo kill -9 26869
For windows users execute the following command in PowerShell window to kill all the node processes.
Stop-Process -processname node
Another thing that can give this error, is two HTTP servers in the same node code. I was updating some Express 2 to Express 3 code, and had this...
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
// tons of shit.
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
And, it triggered this error.
NOOB ERROR FIX: I'm new to Node.js and setup a webserver listening to port 8080. I ran into the EADDRINUSE error. I tried all the various 'kill -9 node' iterations and kept getting, 'node: no process found'
The problem was, I was calling http.listen(8080); TWICE in the same blob of code. So the first time it was actually working fine, and the second time it threw an error.
If you're getting a 'no process found' response when trying to kill the port, try checking to make sure you're only opening the port once.
Under a controller env, you could use:
pkill node
before running your script should do the job.
Bear in mind this command will kill all the node
processes, which might be right if you have i.e a container running only one instance, our you have such env where you can guarantee that.
In any other scenario, I recommend using a command to kill a certain process id or name you found by looking for it programmatically. like if your process is called, node-server-1 you could do pkill node-server-1
.
This resource might be useful to understand: https://www.thegeekstuff.com/2009/12/4-ways-to-kill-a-process-kill-killall-pkill-xkill/
I got:
Error: listen EADDRINUSE: address already in use :::8000
I was trying to look for the process listening to port 8000
and had no luck - there were none (sudo netstat -nlp | grep 8000
).
It turned out I had app.listen(8000)
written twice in my script.
My assumption is that the interference was happening only in a short time when trying to run the script, so looking for processes listening to the port before and after error didn't show any.
I have seen this error before (in node) with http.client, and as I recall, the problem had to do with not initializing the httpClient or setting bad options in the httpClient creation and/or in the url request.
sudo kill $(sudo lsof -t -i:80)
for force kill
sudo kill -9 $(sudo lsof -t -i:80)
use above cmd to kill particular port and then run your server
if you want to solve this
$ node server events.js:141 throw er; // Unhandled 'error' event ^
Error: listen EADDRINUSE :::3000 at Object.exports._errnoException (util.js:907:11) at exports._exceptionWithHostPort (util.js:930:20) at Server._listen2 (net.js:1250:14) at listen (net.js:1286:10) at Server.listen (net.js:1382:5) at EventEmitter.listen (C:\sendbox\mean\node_modules\express\lib\application .js:617:24) at Object. (C:\sendbox\mean\server.js:28:5) at Module._compile (module.js:409:26) at Object.Module._extensions..js (module.js:416:10) at Module.load (module.js:343:32)
change your port number to 8000
The aforementioned killall -9 node
, suggested by Patrick works as expected and solves the problem but you may want to read the edit part of this very answer about why kill -9
may not be the best way to do it.
On top of that you might want to target a single process rather than blindly killing all active processes.
In that case, first get the process ID (PID) of the process running on that port (say 8888):
lsof -i tcp:8888
This will return something like:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 57385 You 11u IPv6 0xac745b2749fd2be3 0t0 TCP *:ddi-tcp-1 (LISTEN)
Then just do (ps - actually do not. Please keep reading below):
kill -9 57385
You can read a bit more about this here.
EDIT: I was reading on a fairly related topic today and stumbled upon this interesting thread on why should i not kill -9
a process.
Generally, you should use kill -15 before kill -9 to give the target process a chance to clean up after itself. (Processes can't catch or ignore SIGKILL, but they can and often do catch SIGTERM.) If you don't give the process a chance to finish what it's doing and clean up, it may leave corrupted files (or other state) around that it won't be able to understand once restarted.
So, as stated you should better kill the above process with:
kill -15 57385
EDIT 2: As noted in a comment around here many times this error is a consequence of not exiting a process gracefully. That means, a lot of people exit a node command (or any other) using CTRL+Z. The correct way of stopping a running process is issuing the CTRL+C command which performs a clean exit.
Exiting a process the right way will free up that port while shutting down. This will allow you to restart the process without going through the trouble of killing it yourself before being able to re-run it again.
EADDRINUSE
means that the port(which we try to listen in node application) is already being used. In order to overcome, we need to identify which process is running with that port.
For example if we are trying to listen our node application in 3000 port. We need to check whether that port is already is being used by any other process.
$sudo netstat -plunt |grep :3000
That the above command gives below result.
tcp6 0 0 :::3000 :::* LISTEN 25315/node
Now you got process ID(25315), Kill that process.
kill -9 25315
npm run start
Note: This solution for linux users.
In my case I use a web hosting but it´s the same in local host, I used:
ps -aef | grep 'node'
for watch the node process then, the console shows the process with PID. for kill the process you have to use this command:
kill -9 PID
where PID is the process id from the command above.
The error EADDRINUSE
(Address already in use) reports that there is already another process on the local system occupying that address / port.
There is a npm package called find-process which helps finding (and closing) the occupying process.
Here is a little demo code:
const find = require('find-process')
const PORT = 80
find('port', PORT)
.then((list) => {
console.log(`Port "${PORT}" is blocked. Killing blocking applications...`)
const processIds = list.map((item) => item.pid)
processIds.forEach((pid) => process.kill(pid, 10))
})
I prepared a small sample which can reproduce the EADDRINUSE
error. If you launch the following program in two separate terminals, you will see that the first terminal will start a server (on port "3000") and the second terminal will close the already running server (because it blocks the execution of the second terminal, EADDRINUSE
):
Minimal Working Example:
const find = require('find-process')
const http = require('http')
const PORT = 3000
// Handling exceptions
process.on('uncaughtException', (error) => {
if (error.code === 'EADDRINUSE') {
find('port', PORT)
.then((list) => {
const blockingApplication = list[0]
if (blockingApplication) {
console.log(`Port "${PORT}" is blocked by "${blockingApplication.name}".`)
console.log('Shutting down blocking application...')
process.kill(blockingApplication.pid)
// TODO: Restart server
}
})
}
})
// Starting server
const server = http.createServer((request, response) => {
response.writeHead(200, {'Content-Type': 'text/plain'})
response.write('Hello World!')
response.end()
})
server.listen(PORT, () => console.log(`Server running on port "${PORT}"...`))
EADDRINUSE means port of your nodejs app is already in use.
lsof -i tcp:3000
kill -9 processId
Just a head's up, Skype will sometimes listen on port 80 and therefore cause this error if you try to listen on port 80 from Node.js or any other app.
You can turn off that behaviour in Skype by accessing the options and clicking Advanced -> Connection -> Use port 80 (Untick this)
P.S. After making that change, don't forget to restart Skype!
I would prefer doing
killall -15 node
because, kill -15
gives process a chance to cleanup itself.
Now, you can verify by
ps aux | grep node
Note: If you don't give process a chance to finish what it is currently doing and clean up, it may lead to corrupted files
Got this error when we accidentally had two local Express environments in the same instance pointing to the same port.
If you got this far down this list of answers, I hope this will be helpful and solve your problem.
Two servers can not listen on same port, so check out if other server listening on same port, also check out for browser sync if its running on same port
For other people on windows 10 with node as localhost
and running on a port like 3500, not 80 ...
What does not work:
killall ? command not found
ps -aux | grep 'node' ? ps: user x unknown
What shows information but still not does work:
ps -aef | grep 'node'
ps ax
kill -9 61864
What does work:
Git Bash or Powershell on Windows
net -a -o | grep 3500 (whatever port you are looking for)
Notice the PID ( far right )
I could not get killall
to work... so
Now after that not so fun exercise on windows, I realized I can use task manager and find the Node engine and just end it.
FYI , I was using Visual Studio Code to run Node on port 3500, and I use Git Bash shell inside VS code. I had exited gracefully with Ctrl + C , but sometimes this does not kill it. I don't want to change my port or reboot so this worked. Hopefully it helps others. Otherwise it is documentation for myself.
Seems there is another Node ng serve process running. Check it by typing this in your console (Linux/Mac):
ps aux|grep node
and quit it with:
kill -9 <NodeProcessId>
OR alternativley use
ng serve --port <AnotherFreePortNumber>
to serve your project on a free port of you choice.
EADDRINUSE translates to "The port you are trying to issue app.listen() on is being used by other programs". You can use a script like this to check if your port is in use and then change the port in your app.listen().
var net = require('net');
var errors = ['EADDRINUSE'];
var isUsed = function(port) {
var tester = net.createServer()
.once('error', function (err) {
if (!errors.includes(err.code)) {
console.log("Port is in use, change the port.");
}
})
.once('listening', function() {
tester.once('close', function() {
console.log("You are good to go.");
})
.close()
})
.listen(port);
}
You can add other errors in the errors array to check for all sorts of error types as well.
There is a way to terminate the process using Task Manager:
Note that this solution is for Windows only
Go to the Task Manager (or using the shortcut Ctrl + Shift + Esc)
On "Background Processes", find "Node.js" processes and terminate them (Right-click them and choose "End Task")
While killing the NODE_PORT, it might kill your chrome process or anything that is listening to the same port, and that's annoying.
This shell script may be helpful - in my case the port is 1337 but you can change it anytime
# LOGIC
CHROME_PIDS=`pidof chrome`
PORT_PIDS=`lsof -t -i tcp:1337`
for pid in $PORT_PIDS
do
if [[ ${CHROME_PIDS} != *$pid* ]];then
# NOT FOUND IN CHROME PIDS
echo "Killing $pid..."
ps -p "$pid"
kill -kill "$pid"
fi
done
sails lift
# OR 'node app' OR whatever that starts your node
exit
Windows is always tricky with open source..
change the port simply it works
node-inspector --web-port=8099
I had the same issue recently.
It means that the port is already being used by another application (express or other software)
In my case, I had accidentally run express on 2 terminals, so exiting the terminal using 'Ctrl + C' fixed things for me. (Run server from only one terminal)
Hope it helps others.
Your application is already running on that port 8080 . Use this code to kill the port and run your code again
sudo lsof -t -i tcp:8080 | xargs kill -9
Try both commands and it will stop all node process.
killall 9 node
pkill node
npm start
You should try killing the process that is listening on port 80.
Killall will kill all the node apps running. You might not want to do that. With this command you can kill only the one app that is listening on a known port.
If using unix try this command:
sudo fuser -k 80/tcp
Source: Stackoverflow.com