Related
I have a simple server running in node.js using connect:
var server = require('connect').createServer();
//actions...
server.listen(3000);
In my code I have actual handlers, but thats the basic idea. The problem I keep getting is
EADDRINUSE, Address already in use
I receive this error when running my application again after it previously crashed or errors. Since I am not opening a new instance of terminal I close out the process with ctr + z.
I am fairly certain all I have to do is close out the server or connection. I tried calling server.close() in process.on('exit', ...); with no luck.
First, you would want to know which process is using port 3000
sudo lsof -i :3000
this will list all PID listening on this port, once you have the PID you can terminate it with the following:
kill -9 <PID>
where you replace <PID> by the process ID, or the list of process IDs, the previous command output.
You can also go the command line route:
ps aux | grep node
to get the process ids.
Then:
kill -9 PID
Doing the -9 on kill sends a SIGKILL (instead of a SIGTERM).
SIGTERM has been ignored by node for me sometimes.
I hit this on my laptop running win8. this worked.
Run cmd.exe as 'Administrator':
C:\Windows\System32>taskkill /F /IM node.exe
SUCCESS: The process "node.exe" with PID 11008 has been terminated.
process.on('exit', ..) isn't called if the process crashes or is killed. It is only called when the event loop ends, and since server.close() sort of ends the event loop (it still has to wait for currently running stacks here and there) it makes no sense to put that inside the exit event...
On crash, do process.on('uncaughtException', ..) and on kill do process.on('SIGTERM', ..)
That being said, SIGTERM (default kill signal) lets the app clean up, while SIGKILL (immediate termination) won't let the app do anything.
Check the PID i.e. id of process running on port 3000 with below command :
lsof -i tcp:3000
It would output something like following:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 5805 xyz 12u IPv6 63135 0t0 TCP *:3000 (LISTEN)
Now kill the process using :
kill -9 5805
For macOS Monterey(12.0):
Apple introduced some changes for AirPlay on macOS Monterey. Now, it uses 5000 and 7000 ports. If you are using these ports in your project, you need to disable this feature.
System Preferences > Sharing > untick AirPlay Receiver
For macOS Ventura(13.0) and above users:
System Settings > General > disable AirPlay Receiver
I found this solution, try it
Give permission use sudo
sudo pkill node
I usually use
npx kill-port 3000
or on my mac.
killall node
Rewriting #Gerard 's comment in my answer:
Try pkill nodejs or pkill node if on UNIX-like OS.
This will kill the process running the node server running on any port.
Worked for me.
Linux
Run ps and determine the PID of your node process.
Then, run sudo kill PID
Windows
Use tasklist to display the list of running processes:
tasklist /O
Then, kill the node process like so (using the PID obtained from the tasklist command):
taskkill /pid PID
Here is a one liner (replace 3000 with a port or a config variable):
kill $(lsof -t -i:3000)
For windows open Task Manager and find node.exe processes. Kill all of them with End Task.
I was getting this error once and took many of the approaches here.
My issues was that I had two app.listen(3000); calls in the same app.js script. The first app.listen() succeeded where the second threw the error.
Another useful command I came across that helped me debug was sudo fuser -k 3000/tcp which will kill any rogue processes you might have started (some processes may restart, e.g. if run with forever.js, but it was useful for me).
For Visual Studio Noobs like me
You may be running the process in other terminals!
After closing the terminal in Visual Studio, the terminal just disappears.
I manually created a new one thinking that the previous one was destroyed. In reality, every time I was clicking on New Terminal I was actually creating a new one on top of the previous ones.
So I located the first terminal and... Voila, I was running the server there.
Windows by Cmd
1/2. search => write cmd => open node.js command prompt
2/2. Run windows command: taskkill
Ends one or more tasks or processes.
taskkill /f /im node.exe
/f - force ended
/im - Specifies the image name of the process to be terminated.
node.exe - executable file
Windows - Mannualy by Task Manager
This command is the same as going to Task Manager under the details tab & select node tasks (Tidy in my opinion).
And end task
Visual studio
Sometimes there is more than one terminal/task (client/server and so on).
Select and close by ctrl + c.
You may run into scenarios where even killing the thread or process won't actually terminate the app (this happens for me on Linux and Windows every once in a while). Sometimes you might already have an instance running that you didn't close.
As a result of those kinds of circumstances, I prefer to add to my package.json:
"scripts": {
"stop-win": "Taskkill /IM node.exe /F",
"stop-linux": "killall node"
},
I can then call them using:
npm run stop-win
npm run stop-Linux
You can get fancier and make those BIN commands with an argument flag if you want. You can also add those as commands to be executed within a try-catch clause.
FYI, you can kill the process in one command sudo fuser -k 3000/tcp. This can be done for all other ports like 8000, 8080 or 9000 which are commonly used for development.
ps aux | grep node
kill -9 [PID] (provided by above command)
Description:
ps will give the process status, aux provide the list of a: all users processes, u: user own processes, x: all other processes not attached to terminal.
pipe symbol: | will pass the result of ps aux to manipulate further.
grep will search the string provided(node in our case) from the list provided by ps aux.
First find out what is running using:
sudo lsof -nP -i4TCP:3000 | grep LISTEN
You will get something like:
php-fpm 110 root 6u IPv4 0x110e2ba1cc64b26d 0t0 TCP 127.0.0.1:3000 (LISTEN)
php-fpm 274 _www 0u IPv4 0x110e2ba1cc64b26d 0t0 TCP 127.0.0.1:3000 (LISTEN)
php-fpm 275 _www 0u IPv4 0x110e2ba1cc64b26d 0t0 TCP 127.0.0.1:3000 (LISTEN)
Then you can kill the process as followed:
sudo kill 110
Then you will be able to run without getting the listen EADDRINUSE :::3000 errors
Really simply for all OS's ..
npx kill-port 3000
Although your problem is as mentioned above you need to catch the different ways node can exit for example
process.on('uncaughtException', (err, origin) => {
console.log(err);
});
// insert other handlers.
bash$ sudo netstat -ltnp | grep -w ':3000'
- tcp6 0 0 :::4000 :::* LISTEN 31157/node
bash$ kill 31157
PowerShell users:
Taskkill /IM node.exe /F
UI solution For Windows users: I found that the top answers did not work for me, they seemed to be commands for Mac or Linux users. I found a simple solution that didn't require any commands to remember: open Task Manager (ctrl+shift+esc). Look at background processes running. Find anything Node.js and end the task.
After I did this the issue went away for me. As stated in other answers it's background processes that are still running because an error was previously encountered and the regular exit/clean up functions didn't get called, so one way to kill them is to find the process in Task Manager and kill it there. If you ran the process from a terminal/powerShell you can usually use ctrl+c to kill it.
Task Manager (ctrl+alt+del) ->
Processes tab ->
select the "node.exe" process and hit "End Process"
Just in case check if you have added this line multiple times by mistake
app.listen(3000, function() {
console.log('listening on 3000')
});
The above code is for express but just check if you are trying to use the same port twice in your code.
In windows users: open task manager and end task the nodejs.exe file, It works fine.
On Windows, I was getting the following error:
EADDRINUSE: address already in use :::8081.
Followed these steps:
Opened CMD as Admin
Ran the folowing
command netstat -ano|findstr "PID :8081"
got the following processes:
killed it via:
taskkill /pid 43144 /f
On MAC you can do like this:
raghavkhunger#MacBook-Air ~ % lsof -i tcp:8081
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 23722 username 24u IPv6 0xeed16d7ccfdd347 0t0 TCP *:sunproxyadmin (LISTEN)
username#MacBook-Air ~ % kill -9 23722
With due respect to all the answers in the form, I would like to add a point.
I found that when I terminate a node app on error using Ctrl + Z, the very next time when I try to open it got the same error EADDRINUSE.
When I use Ctrl + C to terminate a node app, the next time I opened it, it did without a hitch.
Changing the port number to something other than the one in error solved the issue.
using netstat to get all node processes with the port they are using and then kill the only one you want by PID
netstat -lntp | grep node
you will get all node processes
tcp6 0 0 :::5744 :::* LISTEN 3864/node
and then when you get the PID (3864) just kill the processes by PID
kill -HUP PID
You may use hot-node to prevent your server from crashing/ run-time-errors. Hot-node automatically restarts the nodejs application for you whenever there is a change in the node program[source] / process[running node program].
Install hot-node using npm using the global option:
npm install -g hotnode
In my application, I use concurrently to run both backend and front end simultaneously. After ctrl + c, strill the port 5000 is running. Also, port 3000 is running. I have to manually kill processes. How can I solve this?
Run cmd.exe as 'Administrator':
C:\Windows\System32>taskkill /F /IM node.exe
run pa -xa | grep node
you will get result with processid
4476 pts/0 Sl+ 0:01 node index.js
then kill the process with kill -9 4476
as simple as that
lsof -ti finds open files(sockets are files in nix based systems) -t removes the headers, so that we can pipe into kill(We just want the process id), -i lets lsof find the file based off the internet address. We do not have to provide the full address, we can just search by port, by using the pattern :port.
Some commands accept input from stdin, and we can pipe directly to them, kill is not one of those commands, so we must use xargs(It reads from stdin, and calls the specified command with the input from stdin).
Finally the ; lets us execute both commands irrespective of one another. Regardless of whether lsof -ti:3000 | xargs kill succeeds or fails,
lsof -ti:5000 | xargs kill will run, and vice versa.
lsof -ti:3000 | xargs kill; lsof -ti:5000 | xargs kill
Restart your laptop/server, it will release all the busy ports, then try again... you can also use
ps aux | grep node
and then kill the process using:
kill -9 PID..
You can kill all the processes that are using node it can also kill a system process
Not preferred: killall -9 node
but most of the times it wont work for nodemon, and didnt work for me.
You can fix this issue by killing the address in use or may simply restart your device.
1- For Linux to Kill the address in use, use the following command
sudo kill $(sudo lsof -t -i:8080)
where replace 8080 with your app address.
you can simply restart your laptop or change the port number it should work
I launch Stanford Core NLP server using the following command (on Ubuntu 16.04):
java -mx4g -cp "*" edu.stanford.nlp.pipeline.StanfordCoreNLPServer -port 9000 -timeout 15000
I would like to kill this server once I am done using it. Simply closing terminal does not help. It does not release memory. Is there way to kill it and release memory without rebooting computer?
You can always CTRL-C in the terminal window to stop the server.
You could also ps aux | grep StanfordCoreNLPServer to find the pid and then kill the process manually.
When the server is started it should create a shutdown key and you can send that message to the server to close the server. This isn't working on my Macbook Pro (maybe a permission issue ??) but I've seen it work on other machines.
Here is the command:
wget "localhost:9000/shutdown?key=`cat /tmp/corenlp.shutdown`" -O -
Note the shutdown key is stored at /tmp/corenlp.shutdown
If you use the the -server_id server0 option the shutdown key will be stored at this path /tmp/corenlp.shutdown.server0
If you just want to kill the process. You can use lsof command.
#install lsof if missing
sudo apt install lsof
You can find the pid of CoreNLP using
lsof -i:9000
Replace 9000 with the port you used to run the server.
The output looks like
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 15867 XXXX XXX IPv6 XXXXXX 0t0 TCP *:9000 (LISTEN)
Use the pid from here and run.
kill 15867
PID of my server process is 15867.
I have a simple TCP server that listens on a port.
var net = require("net");
var server = net.createServer(function(socket) {
socket.end("Hello!\n");
});
server.listen(7777);
I start it with node server.js and then close it with Ctrl + Z on Mac. When I try to run it again with node server.js I get this error message:
node.js:201
throw e; // process.nextTick error, or 'error' event on first tick
^
Error: listen EADDRINUSE
at errnoException (net.js:670:11)
at Array.0 (net.js:771:26)
at EventEmitter._tickCallback (node.js:192:41)
Am I closing the program the wrong way? How can I prevent this from happening?
To end the program, you should be using Ctrl + C. If you do that, it sends SIGINT, which allows the program to end gracefully, unbinding from any ports it is listening on.
See also: https://superuser.com/a/262948/48624
Ctrl+Z suspends it, which means it can still be running.
Ctrl+C will actually kill it.
you can also kill it manually like this:
ps aux | grep node
Find the process ID (second from the left):
kill -9 PROCESS_ID
This may also work
killall node
Or alternatively you can do all of these in one line:
kill -9 $(ps aux | grep '\snode\s' | awk '{print $2}')
You can replace node inside '\snode\s' with any other process name.
Resume and kill the process:
Ctrl+Z suspends it, which means it is still running as a suspended background process.
You are likely now at a terminal prompt...
Give the command fg to resume the process in the foreground.
type Ctrl+C to properly kill it.
Alternatively, you can kill it manually like this:
(NOTE: the following commands may require root, so sudo ... is your friend)
pkill -9 node
or, if you don't have pkill, this may work:
killall node
or perhaps this:
kill $(ps -e | grep node | awk '{print $1}')
sometimes the process will list its own grep, in which case you'll need:
kill $(ps -e | grep dmn | awk '{print $2}')
.
h/t #ruffin from the comments on the question itself. I had the same issue and his comment helped me solve it myself.
If you are running Node.js interactively (the REPL):
Ctrl + C will take back you to > prompt then type:
process.exit()
or just use Ctrl + D.
you can type .exit to quit node js REPL
$ sudo killall node in another terminal works on mac, while killall node not working:
$ killall node
No matching processes belonging to you were found
on linux try: pkill node
on windows:
Taskkill /IM node.exe /F
or
from subprocess import call
call(['taskkill', '/IM', 'node.exe', '/F'])
you can work following command to be specific in localserver kill(here: 8000)
http://localhost:8000/ kill PID(processId):
$:lsof -i tcp:8000
It will give you following groups of TCPs:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 21521 ubuntu 12u IPv6 345668 0t0 TCP *:8000 (LISTEN)
$:kill -9 21521
It will kill processId corresponding to TCP*:8000
You can use fuser to get what you want to be done.
In order to obtain the process ids of the tasks running on a port you can do:
fuser <<target_port>>/tcp
Let's say the port is 8888, the command becomes:
fuser 8888/tcp
And to kill a process that is running on a port, simply add -k switch.
fuser <<target_port>>/tcp -k
Example (port is 8888):
fuser 8888/tcp -k
That's it! It will close the process listening on the port.
I usually do this before running my server application.
For MacOS
Open terminal
Run the below code and hit enter
sudo kill $(sudo lsof -t -i:4200)
Though this is a late answer, I found this from NodeJS docs:
The 'exit' event is emitted when the REPL is exited either by receiving the .exit command as input, the user pressing <ctrl>-C twice to signal SIGINT, or by pressing <ctrl>-D to signal 'end' on the input stream. The listener callback is invoked without any arguments.
So to summarize you can exit by:
Typing .exit in nodejs REPL.
Pressing <ctrl>-C twice.
pressing <ctrl>-D.
process.exit(0) meaning a natural exit from REPL. If you want to return any other status you can return a non zero number.
process.kill(process.pid) is the way to kill using nodejs api from within your code or from REPL.
If you want to stop your server with npm stop or something like this. You can write the code that kill your server process as:
require('child_process').exec(`kill -9 ${pid}`)
Check this link for the detail:
https://gist.github.com/dominhhai/aa7f3314ad27e2c50fd5
I'm adding this answer because for many projects with production deployments, we have scripts that stop these processes so we don't have to.
A clean way to manage your Node Server processes is using the forever package (from NPM).
Example:
Install Forever
npm install forever -g
Run Node Server
forever start -al ./logs/forever.log -ao ./logs/out.log -ae ./logs/err.log server.js
Result:
info: Forever processing file: server.js
Shutdown Node Server
forever stop server.js
Result
info: Forever stopped process:
uid command script forever pid id logfile uptime
[0] sBSj "/usr/bin/nodejs/node" ~/path/to/your/project/server.js 23084 13176 ~/.forever/forever.log 0:0:0:0.247
This will cleanly shutdown your Server application.
I ran into an issue where I have multiple node servers running, and I want to just kill one of them and redeploy it from a script.
Note: This example is in a bash shell on Mac.
To do so I make sure to make my node call as specific as possible. For example rather than calling node server.js from the apps directory, I call node app_name_1/app/server.js
Then I can kill it using:
kill -9 $(ps aux | grep 'node\ app_name_1/app/server.js' | awk '{print $2}')
This will only kill the node process running app_name_1/app/server.js.
If you ran node app_name_2/app/server.js this node process will continue to run.
If you decide you want to kill them all you can use killall node as others have mentioned.
Late answer but on windows, opening up the task manager with CTRL+ALT+DEL then killing Node.js processes will solve this error.
My use case: on MacOS, run/rerun multiple node servers on different ports from a script
run: "cd $PATH1 && node server1.js & cd $PATH2 && node server2.js & ..."
stop1: "kill -9 $(lsof -nP -i4TCP:$PORT1 | grep LISTEN | awk '{print $2}')"
stop2, stop3...
rerun: "stop1 & stop2 & ... & stopN ; run
for more info about finding a process by a port: Who is listening on a given TCP port on Mac OS X?
For windows first search the PID with your port number
netstat -ano | findStr "portNumber"
After that, kill the task, make sure you are in root of your "c" drive
And the command will be taskkill /F /PID your pid
if you are using VS Code and terminal select node from the right side dropdown first and then do Ctrl + C. Then It will work
Press y when you are prompted.
Thanks
i am testing a server written in nodejs on windows 7
and when i try to run the tester in the command line i get the following error
Error: listen EADDRINUSE
at errnoException (net.js:614:11)
at Array.0 (net.js:704:26)
at EventEmitter._tickCallback (node.js:192:40)
how can I fix it without rebooting?
Run:
ps -ax | grep node
You'll get something like:
60778 ?? 0:00.62 /usr/local/bin/node abc.js
Then do:
kill -9 60778
It means the address you are trying to bind the server to is in use. Try another port or close the program using that port.
On Linux (Ubuntu derivatives at least)
killall node
is easier than this form.
ps | grep <something>
kill <somepid>
Neither will work if you have a orphaned child holding the port. Instead, do this:
netstat -punta | grep <port>
If the port is being held you'll see something like this:
tcp 0 0.0.0.0:<port> 0.0.0.* LISTEN <pid>/<parent>
Now kill by pid:
kill -9 <pid>
The following command will give you a list of node processes running.
ps | grep node
To free up that port, stop the process using the following.
kill <processId>
You are getting the error EADDRINUSE because the port, which your application wants to use, is occupied by another process. To release this port, you need to terminate the occupying process.
Since you are on Windows, you can terminate the process using the command prompt (cmd). With the cmd you can discover the process ID (PID) of the blocking application. You will need the PID in order to terminate / kill the process.
Here is a step-by-step guide...
Find all processes which are running on a specified port (in this example, Port is "3000"):
netstat -ano | find ":3000 "
The netstat command will list up all processes running on the specified port. In the last column of the netstat results you can see the PIDs (in this example, PID is "8308"). You can find out more about a specific PID by running the following command:
tasklist /fi "pid eq 8308"
If you want to terminate a process, you can do that with the following command by using its PID (in this example, PID is "8308"):
taskkill /pid 8308 /f
Screenshot
When you get an error Error: listen EADDRINUSE,
Try running the following shell commands:
netstat -a -o | grep 8080
taskkill /F /PID 6204
I greped for 8080, because I know my server is running on port 8080. (static tells me when I start it: 'serving "." at http://127.0.0.1:8080'.) You might have to search for a different port.
suppose your server is running on port 3000
lsof -i tcp:3000
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 11716 arun 11u IPv6 159175 0t0 TCP *:3000 (LISTEN)
after that use kill -9 <pid>
in the above case sudo kill -9 11716
use below command to kill a process running at a certain port - 3000 in this example below
kill -9 $(lsof -t -i:3000)
One possible solution that worked for me was simply to close the window in browser where I had the corresponding "http://localhost:3000/" script running.
When you get an error
Error: listen EADDRINUSE
Open command prompt and type the following instructions:
netstat -a -o | grep 8080
taskkill /F /PID** <*ur Process ID no*>
after that restart phone gap interface.
If you want to know which process ID phonegap is using, open TASK MANAGER and look at the Column heading PID and find the PID no.
Check the Process ID
sudo lsof -i:8081
Than kill the particular Process
sudo kill -9 2925
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
This works on Mac:
Step 1.
sudo lsof -i tcp:3000 (or whatever port you want to kill)
Above command will give you the Process Id(s) currently holding the port.
Step 2.
Kill -9 <pid>
you can change your port in app.js or in ur project configuration file.
default('port', 80)
and to see if port 80 is already in use you can do
netstat -antp |grep 80
netstat -antp |grep node
you might wanna see if node process is already running or not.
ps -ef |grep node
and if you find its already running, you can kill it using
killall node
I created 2 servers, listening on same port 8081, running from same code, while learning
1st server creation shud have worked
2nd server creation failed with EADDRINUSE
node.js callback delays might be reason behind neither worked, or 2nd server creation had exception, and program exited, so 1st server is also closed
2 server issue hint, I got from:
How to fix Error: listen EADDRINUSE while using nodejs?
Error: listen EADDRINUSE to solve it in Ubuntu run in terminal netstat -nptl and after this kill -9 {process-number} this command is to kill node process and now you can try to run again node server.js command
Ex
listen EADDRINUSE :::8080
netstat -nptl
tcp6 0 0 :::9000 :::* LISTEN 9660/java
tcp6 0 0 :::5800 :::* LISTEN -
tcp6 0 0 :::5900 :::* LISTEN -
tcp6 0 0 :::8080 :::* LISTEN 10401/node
tcp6 0 0 :::20080 :::* LISTEN 9660/java
tcp6 0 0 :::80 :::* LISTEN -
tcp6 0 0 :::22 :::* LISTEN -
tcp6 0 0 :::10137 :::* LISTEN 9660/java
kill -9 10401
I have node red installed on my Mac and my Raspberry Pi. Had the exact same problem and doing 'killall' didn't help. Once I shut down the Raspberry Pi and restarted my computer it worked fine.
It may be possible that you have tried to run the npm start command in two different tabs .you cant run npm start when it is already running in some tab.check it once .
To anyone who has tried all of the above, but still can't find the rouge process, try them all again but make sure you include "sudo" in front of the commands.
If you like UI more, find the process Node.js in windows task manager and kill it.
ps -ef |grep node
find app.js ,
kill pid of app.js
simply kill the node
as
pkill -9 node
in terminal of ubantu
than start node
You will need to kill the port by trying to use the following command on the terminal
$ sudo killall -9 nodejs
I have solved this issue by adding below in my package.json for killing active PORT - 4000 (in my case) Running on WSL2/Linux/Mac
"scripts": {
"dev": "nodemon app.js",
"predev":"fuser -k 4000/tcp && echo 'Terminated' || echo 'Nothing was running on the PORT'",
}
Source
I Just delete that (cmd) Terminal and open another terminal and run again
node myfile.js
it works awesomely for me.
It's might be too late but it's working like a charm.
You need pm2 to be installed
npm install -g pm2
To stoping the current running server (server.js):
pm2 stop -f server.js
It's year 2022 now and I am on Monterey (Mac user).
lsof -i tcp:3000
Kill -9 <PID shown in your list>
To kill node server first run this command in your terminal :
top
open another window then copy the server id from the previous window: PID number -9 kill
so now you killed your node server try again to run your app.
I used the command netstat -ano | grep "portnumber" in order to list out the port number/PID for that process.
Then, you can use taskkill -f //pid 111111 to kill the process, last value being the pid you find from the first command.
One problem I run into at times is node respawning even after killing the process, so I have to use the good old task manager to manually kill the node process.
In window, please execute this command:
taskkill /F /PID 1952