Related
Since this post has gotten a lot of attention over the years, I've listed the top solutions per platform at the bottom of this post.
Original post:
I want my node.js server to run in the background, i.e.: when I close my terminal I want my server to keep running. I've googled this and came up with this tutorial, however it doesn't work as intended. So instead of using that daemon script, I thought I just used the output redirection (the 2>&1 >> file part), but this too does not exit - I get a blank line in my terminal, like it's waiting for output/errors.
I've also tried to put the process in the background, but as soon as I close my terminal the process is killed as well.
So how can I leave it running when I shut down my local computer?
Top solutions:
Systemd (Linux)
Launchd (Mac)
node-windows (Windows)
PM2 (Node.js)
Copying my own answer from How do I run a Node.js application as its own process?
2015 answer: nearly every Linux distro comes with systemd, which means forever, monit, PM2, etc are no longer necessary - your OS already handles these tasks.
Make a myapp.service file (replacing 'myapp' with your app's name, obviously):
[Unit]
Description=My app
[Service]
ExecStart=/var/www/myapp/app.js
Restart=always
User=nobody
# Note Debian/Ubuntu uses 'nogroup', RHEL/Fedora uses 'nobody'
Group=nogroup
Environment=PATH=/usr/bin:/usr/local/bin
Environment=NODE_ENV=production
WorkingDirectory=/var/www/myapp
[Install]
WantedBy=multi-user.target
Note if you're new to Unix: /var/www/myapp/app.js should have #!/usr/bin/env node on the very first line and have the executable mode turned on chmod +x app.js.
Copy your service file into the /etc/systemd/system.
Start it with systemctl start myapp.
Enable it to run on boot with systemctl enable myapp.
See logs with journalctl -u myapp
This is taken from How we deploy node apps on Linux, 2018 edition, which also includes commands to generate an AWS/DigitalOcean/Azure CloudConfig to build Linux/node servers (including the .service file).
You can use Forever, A simple CLI tool for ensuring that a given node script runs continuously (i.e. forever):
https://www.npmjs.org/package/forever
UPDATE - As mentioned in one of the answers below, PM2 has some really nice functionality missing from forever. Consider using it.
Original Answer
Use nohup:
nohup node server.js &
EDIT I wanted to add that the accepted answer is really the way to go. I'm using forever on instances that need to stay up. I like to do npm install -g forever so it's in the node path and then just do forever start server.js
This might not be the accepted way, but I do it with screen, especially while in development because I can bring it back up and fool with it if necessary.
screen
node myserver.js
>>CTRL-A then hit D
The screen will detach and survive you logging off. Then you can get it back back doing screen -r. Hit up the screen manual for more details. You can name the screens and whatnot if you like.
2016 Update:
The node-windows/mac/linux series uses a common API across all operating systems, so it is absolutely a relevant solution. However; node-linux generates systemv init files. As systemd continues to grow in popularity, it is realistically a better option on Linux. PR's welcome if anyone wants to add systemd support to node-linux :-)
Original Thread:
This is a pretty old thread now, but node-windows provides another way to create background services on Windows. It is loosely based on the nssm concept of using an exe wrapper around your node script. However; it uses winsw.exe instead and provides a configurable node wrapper for more granular control over how the process starts/stops on failures. These processes are available like any other service:
The module also bakes in some event logging:
Daemonizing your script is accomplished through code. For example:
var Service = require('node-windows').Service;
// Create a new service object
var svc = new Service({
name:'Hello World',
description: 'The nodejs.org example web server.',
script: 'C:\\path\\to\\my\\node\\script.js'
});
// Listen for the "install" event, which indicates the
// process is available as a service.
svc.on('install',function(){
svc.start();
});
// Listen for the "start" event and let us know when the
// process has actually started working.
svc.on('start',function(){
console.log(svc.name+' started!\nVisit http://127.0.0.1:3000 to see it in action.');
});
// Install the script as a service.
svc.install();
The module supports things like capping restarts (so bad scripts don't hose your server) and growing time intervals between restarts.
Since node-windows services run like any other, it is possible to manage/monitor the service with whatever software you already use.
Finally, there are no make dependencies. In other words, a straightforward npm install -g node-windows will work. You don't need Visual Studio, .NET, or node-gyp magic to install this. Also, it's MIT and BSD licensed.
In full disclosure, I'm the author of this module. It was designed to relieve the exact pain the OP experienced, but with tighter integration into the functionality the Operating System already provides. I hope future viewers with this same question find it useful.
If you simply want to run the script uninterrupted until it completes you can use nohup as already mentioned in the answers here. However, none of the answers provide a full command that also logs stdin and stdout.
nohup node index.js >> app.log 2>&1 &
The >> means append to app.log.
2>&1 makes sure that errors are also send to stdout and added to the app.log.
The ending & makes sure your current terminal is disconnected from command so you can continue working.
If you want to run a node server (or something that should start back up when the server restarts) you should use systemd / systemctl.
UPDATE: i updated to include the latest from pm2:
for many use cases, using a systemd service is the simplest and most appropriate way to manage a node process. for those that are running numerous node processes or independently-running node microservices in a single environment, pm2 is a more full featured tool.
https://github.com/unitech/pm2
http://pm2.io
it has a really useful monitoring feature -> pretty 'gui' for command line monitoring of multiple processes with pm2 monit or process list with pm2 list
organized Log management -> pm2 logs
other stuff:
Behavior configuration
Source map support
PaaS Compatible
Watch & Reload
Module System
Max memory reload
Cluster Mode
Hot reload
Development workflow
Startup Scripts
Auto completion
Deployment workflow
Keymetrics monitoring
API
Try to run this command if you are using nohup -
nohup npm start 2>/dev/null 1>/dev/null&
You can also use forever to start server
forever start -c "npm start" ./
PM2 also supports npm start
pm2 start npm -- start
If you are running OSX, then the easiest way to produce a true system process is to use launchd to launch it.
Build a plist like this, and put it into the /Library/LaunchDaemons with the name top-level-domain.your-domain.application.plist (you need to be root when placing it):
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>top-level-domain.your-domain.application</string>
<key>WorkingDirectory</key>
<string>/your/preferred/workingdirectory</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/bin/node</string>
<string>your-script-file</string>
</array>
<key>RunAtLoad</key>
<true/>
<key>KeepAlive</key>
<true/>
</dict>
</plist>
When done, issue this (as root):
launchctl load /Library/LaunchDaemons/top-level-domain.your-domain.application.plist
launchctl start top-level-domain.your-domain.application
and you are running.
And you will still be running after a restart.
For other options in the plist look at the man page here: https://developer.apple.com/library/mac/documentation/Darwin/Reference/Manpages/man5/launchd.plist.5.html
I am simply using the daemon npm module:
var daemon = require('daemon');
daemon.daemonize({
stdout: './log.log'
, stderr: './log.error.log'
}
, './node.pid'
, function (err, pid) {
if (err) {
console.log('Error starting daemon: \n', err);
return process.exit(-1);
}
console.log('Daemonized successfully with pid: ' + pid);
// Your Application Code goes here
});
Lately I'm also using mon(1) from TJ Holowaychuk to start and manage simple node apps.
I use Supervisor for development. It just works. When ever you make changes to a .js file Supervisor automatically restarts your app with those changes loaded.
Here's a link to its Github page
Install :
sudo npm install supervisor -g
You can easily make it watch other extensions with -e. Another command I use often is -i to ignore certain folders.
You can use nohup and supervisor to make your node app run in the background even after you log out.
sudo nohup supervisor myapp.js &
Node.js as a background service in WINDOWS XP
Kudos goes to Hacksparrow at: http://www.hacksparrow.com/install-node-js-and-npm-on-windows.html for tutorial installing Node.js + npm for windows.
Kudos goes to Tatham Oddie at: http://blog.tatham.oddie.com.au/2011/03/16/node-js-on-windows/ for nnsm.exe implementation.
Installation:
Install WGET http://gnuwin32.sourceforge.net/packages/wget.htm via installer executable
Install GIT http://code.google.com/p/msysgit/downloads/list via installer executable
Install NSSM http://nssm.cc/download/?page=download via copying nnsm.exe into %windir%/system32 folder
Create c:\node\helloworld.js
// http://howtonode.org/hello-node
var http = require('http');
var server = http.createServer(function (request, response) {
response.writeHead(200, {"Content-Type": "text/plain"});
response.end("Hello World\n");
});
server.listen(8000);
console.log("Server running at http://127.0.0.1:8000/");
Open command console and type the following (setx only if Resource Kit is installed)
C:\node> set path=%PATH%;%CD%
C:\node> setx path "%PATH%"
C:\node> set NODE_PATH="C:\Program Files\nodejs\node_modules"
C:\node> git config --system http.sslcainfo /bin/curl-ca-bundle.crt
C:\node> git clone --recursive git://github.com/isaacs/npm.git
C:\node> cd npm
C:\node\npm> node cli.js install npm -gf
C:\node> cd ..
C:\node> nssm.exe install node-helloworld "C:\Program Files\nodejs\node.exe" c:\node\helloworld.js
C:\node> net start node-helloworld
A nifty batch goodie is to create c:\node\ServiceMe.cmd
#echo off
nssm.exe install node-%~n1 "C:\Program Files\nodejs\node.exe" %~s1
net start node-%~n1
pause
Service Management:
The services themselves are now accessible via Start-> Run->
services.msc or via Start->Run-> MSCONFIG-> Services (and check 'Hide
All Microsoft Services').
The script will prefix every node made via the batch script with
'node-'.
Likewise they can be found in the registry: "HKLM\SYSTEM\CurrentControlSet\Services\node-xxxx"
The accepted answer is probably the best production answer, but for a quick hack doing dev work, I found this:
nodejs scriptname.js & didn't work, because nodejs seemed to gobble up the &, and so the thing didn't let me keep using the terminal without scriptname.js dying.
But I put nodejs scriptname.js in a .sh file, and
nohup sh startscriptname.sh & worked.
Definitely not a production thing, but it solves the "I need to keep using my terminal and don't want to start 5 different terminals" problem.
June 2017 Update:
Solution for Linux: (Red hat). Previous comments doesn't work for me.
This works for me on Amazon Web Service - Red Hat 7. Hope this works for somebody out there.
A. Create the service file
sudo vi /etc/systemd/system/myapp.service
[Unit]
Description=Your app
After=network.target
[Service]
ExecStart=/home/ec2-user/meantodos/start.sh
WorkingDirectory=/home/ec2-user/meantodos/
[Install]
WantedBy=multi-user.target
B. Create a shell file
/home/ec2-root/meantodos/start.sh
#!/bin/sh -
sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to 8080
npm start
then:
chmod +rx /home/ec2-root/meantodos/start.sh
(to make this file executable)
C. Execute the Following
sudo systemctl daemon-reload
sudo systemctl start myapp
sudo systemctl status myapp
(If there are no errors, execute below. Autorun after server restarted.)
chkconfig myapp -add
If you are running nodejs in linux server, I think this is the best way.
Create a service script and copy to /etc/init/nodejs.conf
start service: sudo service nodejs start
stop service: sudo service nodejs stop
Sevice script
description "DManager node.js server - Last Update: 2012-08-06"
author "Pedro Muniz - pedro.muniz#geeklab.com.br"
env USER="nodejs" #you have to create this user
env APPNAME="nodejs" #you can change the service name
env WORKDIR="/home/<project-home-dir>" #set your project home folder here
env COMMAND="/usr/bin/node <server name>" #app.js ?
# used to be: start on startup
# until we found some mounts weren't ready yet while booting:
start on started mountall
stop on shutdown
# Automatically Respawn:
respawn
respawn limit 99 5
pre-start script
sudo -u $USER echo "[`date -u +%Y-%m-%dT%T.%3NZ`] (sys) Starting" >> /var/log/$APPNAME.log
end script
script
# Not sure why $HOME is needed, but we found that it is:
export HOME="<project-home-dir>" #set your project home folder here
export NODE_PATH="<project node_path>"
#log file, grant permission to nodejs user
exec start-stop-daemon --start --make-pidfile --pidfile /var/run/$APPNAME.pid --chuid $USER --chdir $WORKDIR --exec $COMMAND >> /var/log/$APPNAME.log 2>&1
end script
post-start script
# Optionally put a script here that will notifiy you node has (re)started
# /root/bin/hoptoad.sh "node.js has started!"
end script
pre-stop script
sudo -u $USER echo "[`date -u +%Y-%m-%dT%T.%3NZ`] (sys) Stopping" >> /var/log/$APPNAME.log
end script
use nssm the best solution for windows, just download nssm, open cmd to nssm directory and type
nssm install <service name> <node path> <app.js path>
eg: nssm install myservice "C:\Program Files\nodejs" "C:\myapp\app.js"
this will install a new windows service which will be listed at services.msc from there you can start or stop the service, this service will auto start and you can configure to restart if it fails.
Use pm2 module. pm2 nodejs module
Since I'm missing this option in the list of provided answers I'd like to add an eligible option as of 2020: docker or any equivalent container platform. In addition to ensuring your application is working in a stable environment there are additional security benefits as well as improved portability.
There is docker support for Windows, macOS and most/major Linux distributions. Installing docker on a supported platform is rather straight-forward and well-documented. Setting up a Node.js application is as simple as putting it in a container and running that container while making sure its being restarted after shutdown.
Create Container Image
Assuming your application is available in /home/me/my-app on that server, create a text file Dockerfile in folder /home/me with content similar to this one:
FROM node:lts-alpine
COPY /my-app/ /app/
RUN cd /app && npm ci
CMD ["/app/server.js"]
It is creating an image for running LTS version of Node.js under Alpine Linux, copying the application's files into the image and runs npm ci to make sure dependencies are matching that runtime context.
Create another file .dockerignore in same folder with content
**/node_modules
This will prevent existing dependencies of your host system from being injected into container as they might not work there. The presented RUN command in Dockerfile is going to fix that.
Create the image using command like this:
docker build -t myapp-as-a-service /home/me
The -t option is selecting the "name" of built container image. This is used on running containers below.
Note: Last parameter is selecting folder containing that Dockerfile instead of the Dockerfile itself. You may pick a different one using option -f.
Start Container
Use this command for starting the container:
docker run -d --restart always -p 80:3000 myapp-as-a-service
This command is assuming your app is listening on port 3000 and you want it to be exposed on port 80 of your host.
This is a very limited example for sure, but it's a good starting point.
To round out the various options suggested, here is one more: the daemon command in GNU/Linux, which you can read about here: http://libslack.org/daemon/manpages/daemon.1.html. (apologies if this is already mentioned in one of the comments above).
Check out fugue! Apart from launching many workers, you can demonize your node process too!
http://github.com/pgte/fugue
PM2 is a production process manager for Node.js applications with a built-in load balancer. It allows you to keep applications alive forever, to reload them without downtime and to facilitate common system admin tasks.
https://github.com/Unitech/pm2
I am surprised that nobody has mentioned Guvnor
I have tried forever, pm2, etc. But, when it comes to solid control and web based performance metrics, I have found Guvnor to be by far the best. Plus, it is also fully opensource.
Edit : However, I am not sure if it works on windows. I've only used it on linux.
has anyone noticed a trivial mistaken of the position of "2>&1" ?
2>&1 >> file
should be
>> file 2>&1
I use tmux for a multiple window/pane development environment on remote hosts. It's really simple to detach and keep the process running in the background. Have a look at tmux
For people using newer versions of the daemon npm module - you need to pass file descriptors instead of strings:
var fs = require('fs');
var stdoutFd = fs.openSync('output.log', 'a');
var stderrFd = fs.openSync('errors.log', 'a');
require('daemon')({
stdout: stdoutFd,
stderr: stderrFd
});
If you are using pm2, you can use it with autorestart set to false:
$ pm2 ecosystem
This will generate a sample ecosystem.config.js:
module.exports = {
apps: [
{
script: './scripts/companies.js',
autorestart: false,
},
{
script: './scripts/domains.js',
autorestart: false,
},
{
script: './scripts/technologies.js',
autorestart: false,
},
],
}
$ pm2 start ecosystem.config.js
I received the following error when using #mikemaccana's accepted answer on a RHEL 8 AWS EC2 instance: (code=exited, status=216/GROUP)
It was due to using the user/group set to: 'nobody'.
Upon googling, it seems that using user/group as 'nobody'/'nogroup' is bad practice for daemons as answered here on the unix stack exchange.
It worked great after I set user/group to my actual user and group.
You can enter whomai and groups to see your available options to fix this.
My service file for a full stack node app with mongodb:
[Unit]
Description=myapp
After=mongod.service
[Service]
ExecStart=/home/myusername/apps/myapp/root/build/server/index.js
Restart=always
RestartSec=30
User=myusername
Group=myusername
Environment=PATH=/usr/bin:/usr/local/bin
Environment=NODE_ENV=production
WorkingDirectory=/home/myusername/apps/myapp
[Install]
WantedBy=multi-user.target
In case, for local development purpose, you need to start multiple instances of NodeJS app (express, fastify, etc.) then the concurrently might be an option. Here is a setup:
Prerequesites
Your NodeJS app (express, fastify, etc.) is placed at /opt/mca/www/mca-backend/app path.
Assuming that you are using node v.16 installed via brew install node#16
Setup
Install concurrently: npm install -g concurrently
Create a file ~/Library/LaunchAgents/mca.backend.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>mca.backend</string>
<key>LimitLoadToSessionType</key>
<array>
<string>Aqua</string>
<string>Background</string>
<string>LoginWindow</string>
<string>StandardIO</string>
<string>System</string>
</array>
<key>ProgramArguments</key>
<array>
<string>/usr/local/bin/concurrently</string>
<string>--names</string>
<string>dev,prd</string>
<string>--success</string>
<string>all</string>
<string>--kill-others</string>
<string>--no-color</string>
<string>MCA_APP_STAGE=dev node ./server.mjs</string>
<string>MCA_APP_STAGE=prod node ./server.mjs</string>
</array>
<key>RunAtLoad</key>
<true/>
<key>EnvironmentVariables</key>
<dict>
<key>PATH</key>
<string>/usr/local/opt/node#16/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin</string>
</dict>
<key>WorkingDirectory</key>
<string>/opt/mca/www/mca-backend/app</string>
<key>StandardErrorPath</key>
<string>/opt/mca/www/mca-backend/err.log</string>
<key>StandardOutPath</key>
<string>/opt/mca/www/mca-backend/out.log</string>
</dict>
</plist>
Load and run: launchctl bootstrap gui/`id -u` $HOME/Library/LaunchAgents/mca.backend.plist
Get a status: launchctl print gui/`id -u`/mca.backend
Stop: launchctl kill SIGTERM gui/`id -u`/mca.backend
Start/Restart: launchctl kickstart -k -p gui/`id -u`/mca.backend
Unload if not needed anymore: launchctl bootout gui/`id -u`/mca.backend
IMPORTANT: Once you are loaded service with launchctl bootstrap any changes you made in file
~/Library/LaunchAgents/mca.backend.plist won't be in action until you unload the service (by using launchctl bootout)
and then load it again (by using launchctl bootstrap).
Troubleshooting
See launchd logs at: /private/var/log/com.apple.xpc.launchd/launchd.log
This answer is quite late to the party, but I found that the best solution was to write a shell script that used the both the screen -dmS and nohup commands.
screen -dmS newScreenName nohup node myserver.js >> logfile.log
I also add the >> logfile bit on the end so I can easily save the node console.log() statements.
Why did I use a shell script? Well I also added in an if statement that checked to see if the node myserver.js process was already running.
That way I was able to create a single command line option that both lets me keep the server going and also restart it when I have made changes, which is very helpful for development.
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
When I start my server with node app.js in the command line (using Git Bash), I can stop it using ctrl + C.
In my package.json file i got this start-script that allows me to use the command npm start to start the server:
"scripts": {
"start": "node app"
},
When I do this, the server starts as normal:
$ npm start
> nodekb#1.0.0 start C:\Projects\nodekb
> node app.js
Server started on port 3000...
But when i ctrl + C now, the server does not get stopped (the node process still remains in task manager). This means that I get an error when I try to do npm start again, because port 3000 is still being used.
I'm following a tutorial on youtube (video with timestamp), and when this guy ctrl + C and then runs npm start again, it works as normal.
Any ideas why my server process is not stopped when I use ctrl + C?
My app.js file if needed:
var express = require("express");
var path = require("path");
//Init app
var app = express();
//Load View Engine
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "pug");
//Home Route
app.get("/", function(req, res) {
res.render("index", {
title: "Hello"
});
});
//Add route
app.get("/articles/add", function (req, res) {
res.render("add_article", {
title: "Add Article"
});
});
//Start server
app.listen(3000, function() {
console.log("Server started on port 3000...");
});
Thanks!
Ctrl + C does not kill the server. The resolution to the issue was using following code snippet in server.js:
process.on('SIGINT', function() {
console.log( "\nGracefully shutting down from SIGINT (Ctrl-C)" );
// some other closing procedures go here
process.exit(0);
});
This worked for me.
You can also check for other solutions mentioned at Graceful shutdown in NodeJS
I tried it on normal windows cmd, and it worked as it should there. Looks like it's a problem with git bash.
I encountered this problem in MSYS2 proper, even in latest build (x64 2018-05-31).
Luckily, Git for Windows maintain a customized MSYS2 runtime. They have patches that have not been sent upstream, including a patch that fixes emulation of SIGINT, SIGTERM and SIGKILL.
Discussion: https://github.com/nodejs/node/issues/16103
I was able to make my "MSYS2 proper" platform use Git for Windows' MSYS2 runtime, by following these instructions.
Repeated here for posterity:
Install inside MSYS2 proper
This guide assumes that you want the 64-bit version of Git for Windows.
Git for Windows being based on MSYS2, it's possible to install the git package into an existing MSYS2 installation. That means that if you are already using MSYS2 on your computer, you can use Git for Windows without running the full installer or using the portable version.
Note however that there are some caveats for going this way. Git for Windows created some patches for msys2-runtime that have not been sent upstream. (This had been planned, but it was determined in issue #284 that it would probably not be happening.) This means that you have to install Git for Windows customized msys2-runtime to have a fully working git inside MSYS2.
Here the steps to take:
Open an MSYS2 terminal.
Edit /etc/pacman.conf and just before [mingw32] (line #71 on my machine), add the git-for-windows packages repository:
[git-for-windows]
Server = https://wingit.blob.core.windows.net/x86-64
and optionally also the MINGW-only repository for the opposite architecture (i.e. MINGW32 for 64-bit SDK):
[git-for-windows-mingw32]
Server = https://wingit.blob.core.windows.net/i686
Authorize signing key (this step may have to be repeated occasionally until https://github.com/msys2/msys2/issues/62 is fixed)
curl -L https://raw.githubusercontent.com/git-for-windows/build-extra/master/git-for-windows-keyring/git-for-windows.gpg |
pacman-key --add - &&
pacman-key --lsign-key 1A9F3986
Then synchronize new repository
pacboy update
This updates msys2-runtime and therefore will ask you to close the window (not just exit the pacman process). Don't panic, simply close all currently open MSYS2 shells and MSYS2 programs. Once all are closed, start a new terminal again.
Then synchronize again (updating the non-core part of the packages):
pacboy update
And finally install the Git/cURL packages:
pacboy sync git:x git-doc-html:x git-doc-man:x git-extra: curl:x
Finally, check that everything went well by doing git --version in a MINGW64 shell and it should output something like git version 2.14.1.windows.1 (or newer).
Note: I found that the git-extra package installed by step 7 was quite intrusive (it adds a message "Welcome to the Git for Windows SDK!" to every terminal you open), so I removed it with pacman -R git-extra.
Note 2: I also found that Git for Windows' MSYS2 runtime opens in a different home directory than did MSYS2 proper's. This also means it reads in the wrong bash profile. I fixed this by adding an environment variable to Windows in the Control Panel: HOME=/C/msys64/home/myusername
I use git bash on my Windows machine and have run into this issue in the last month or so.
I still do not know what's causing it but I've found another way to stop it.
Open Task Manager
Go into the Processes tab
Look for node.exe and then press End Process
This has allowed me to stop the server quickly.
I had the same problem working with npm. But finally, I knew it was a problem with git itself.
There was a comment by dscho on GitHub 15 days ago. He said that they're working to fix this problem in the next release. He also shared the exact msys-2.0.dll file that can fix the problem for the people who can't wait.
Personally, I couldn't wait :p. So, I gave it a try, downloaded the file, and throw it in the git folder as he said. And the problem gone! It was awesome!
But please be sure to take a backup before you replace the file.
I also tried to kill it after running express as I used to; using taskkill /im node.exe on the cmd but there was no process to be found.
Check out this issue on GitHub,and search for the name of the file msys-2.0.dll to get to the comment faster.
Sometimes the node process hangs.
Check for the process ID using ps You may want to grep for node and then kill the process using kill -9 [PID]
Use Ctrl+\ to send the SIGQUIT signal. It will close the server.
Reference - https://en.wikipedia.org/wiki/Signal_(IPC)
I was able to fix this by switching to nodemon to run the server.
npm install --save-dev nodemon
package.json:
"scripts": {
"start": "nodemon app"
},
I was trying to get json-server to quit a custom server script, but it always left a child process running on Windows. It seems to be a specific problem running express via npm on Windows. If you run the server directly via the c:>node server.js then it seems to quit correctly.
I was able to debug this issue by checking the ports using TCP View, and realizing that my Node server was running even though I had pressed ctrl-C to stop it. I suggest killing the terminal you are running node from entirely.
Use Ctrl + C, then input: >pm2 stop all
This will stop all server or when you get stack with nodejs.
Inside package.json under scripts I had this line react-scripts start&. Notice it ends with an & which would send the process to the background and ctrl+c will not work. Somehow trying to bring this to the foreground with fg also did not work. Solved the problem by removing the &.
if you use Node.js Exec Extention to run your project from f8,
you can use also f9 to cancel running..
This is more than likely just a problem with your console not accurately sending the command to the process. This is pretty common, especially when using third party consoles like cmdr / conemu.
The solution?
Just hit ctrl+c several times until it closes :P
I have developed an application using express js. In order the automate the process, I created a jenkins job and the commands used are as follows
ssh "ip address of the server" node app.js "a" "b" "c" "d" "e" &
curl "url of the application"
curl "another url of the application"
Here a,b,c,d,e are the command line arguments which i am passing to my application on starting the server. The problem is each time i have to shutdown the server first and then run the job. How can this whole process be automated and also server should keep on running in background.
Please let me know if anyone want some more clarification on the question asked. Any help is deeply appreciated.
Step1 Get rid of passing args by:
option 1
use npm scripts in package.json with forever
"scripts": {
"start": "forever express/app.js a b c"
},
Command to run your server npm start
option 2
use bat or sh file to restart your app
file.bat content
forever express/app.js a b c
automate.js
var automaton = require('automaton').create();
automaton.run('run', {cmd: 'file.bat'}).pipe(process.stdout);
Command to run your server node automate
Step2 Configure forever code to run npm start or node automate whenever some change is found in package.json or file.bat, respectively
See it in action, clone Git Repo and run node express\index.js or run npm start
Happy Helping!
I have developed one app in node.js. Recently I noticed when I am doing any changes in my "public" directory of my application, one error is recorded in my log file as follows:
error: restarting script because /home/{user}/workspace/{app_folder}/img/{filename}.jpg changed.
error: Forever detected script was killed by signal: SIGKILL
error: Forever restarting script for 1 time
Express server listening on port 3000
I have already set --watchIgnore parameter in my forever script file in /etc/init/{app}.config
env IGNORE_DIRECTORY="/home/{user}/workspace/{app_folder}/img/**"
exec forever --sourceDir $APPLICATION_DIRECTORY --watchIgnore $IGNORE_DIRECTORY \
-a -w -l $LOG --minUptime 5000 --spinSleepTime 2000 \
start $APPLICATION_START
What am I missing?
Note that the log shows {user} and not your actual user directory. This path looks like it was copied from a user guide, where you were meant to replace those quasi-variables with something.
You use bash environment variables (I assume you're using bash) like this:
env IGNORE_DIRECTORY="~/workspace/${APPLICATION_DIRECTORY}/img/**"
It looks like app_folder is actually defined for you as APPLICATION_DIRECTORY. You can also use ~/ as a shortcut for the current user's home folder.