how to release localhost from Error: listen EADDRINUSE

Question

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
         


        

Answer 1

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

Answer 2

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>

Answer 3

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

Answer 4

[SOLVED]

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

Answer 5

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>

Answer 6

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>