A server is already running. Check …/tmp/pids/server.pid. Exiting - rails

Question

..$ rails s
=> Booting WEBrick
=> Rails 4.0.4 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=>         


        

Answer 1

If you are using docker-compose, and in docker-compose.yml have: volumes: - .:/myapp That means you local workspace is mapped to the container's /myapp folder.

Anything in /myapp will not be deleted for the volumes define.

You can delete ./tmp/pids/server.pid in you local machine. Then the container's /myapp will not have this file.

Answer 2

Run this command -

lsof -wni tcp:3000

then you will get the following table -

COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
ruby    2552 shyam   17u  IPv4  44599      0t0  TCP 127.0.0.1:3000 (LISTEN)
ruby    2552 shyam   18u  IPv6  44600      0t0  TCP [::1]:3000 (LISTEN)

Run this command and replace PID from the Above table

kill -9 PID

example:

kill -9 2552

Answer 3

You can delete the server.pid file.

rm /your_project_path/tmp/pids/server.pid

---

Else:

try in OSX:

sudo lsof -iTCP -sTCP:LISTEN -P | grep :3000

or in linux:

ps -aef | grep rails

or

lsof -wni tcp:3000

kill the process using

kill -9 PID (eg,2786)

Answer 4

For this problem,

What i did is:

• Delete the Pids folder which is located under app/tmp/

• and then, close the terminal which we are running the current app and close the tab (in, browser window)

• after that, again open the terminal by going inside the folder, and then do, rails s

• Then, it opens the fresh tab which is running our application

Answer 5

SOLUTION for Windows:

1. see the pid from \tmp\pids\server.pid
2. open cmd as administrator
3. taskkill /F /PID [pid from step 1.]
4. delete server.pid file
5. restart server

Answer 6

It happens sometimes because you turn off the server by force, for example turning off the OS/machine manually so that the server does not have enough time to log to server.pid.

One easy way is to manually go to tmp/pids/ (the directory that is shown in your console.) and remove server.pid file. Then, when you start the server again, rails server or rails s ,it creates a new server.pid and you can continue development.