Server is already running in Rails

问题:

When I am starting rails server using rails s command it is showing A server is already running. Check C:/Sites/folder/Pids/Server.pids

When I open the file it is outputting a 4 digit number only so how could I resolve this issue ?

FYI

1. No other instance of Rails cmd is running this time.
2. Checked Task manager but only cmd.exe is showing no else process is running. (using Windows).

回答1:

Remove the file: C:/Sites/folder/Pids/Server.pids

回答2:

Old Solution:

rails s -p 4000 -P tmp/pids/server2.pid

Also you can find this post for more options Rails Update to 3.2.11 breaks running multiple servers

New Solutions

when you run 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

=> Ctrl-C to shutdown server

A server is already running. Check /your_project_path/tmp/pids/server.pid. Exiting

So place your path shown here /your_project_path/tmp/pids/server.pid

and remove this server.pid file:

rm /your_project_path/tmp/pids/server.pid

OR Incase you're server was detached then follow below guidelines:

If you detached you rails server by using command "rails -d" then,

Remove rails detached server by using command

ps -aef | grep rails

OR by this command

sudo lsof -wni tcp:3000

then

kill -9 pID

OR use this command

To find and kill process by port name on which that program is running. For 3000 replace port on which your program is running.

sudo kill -9 $(lsof -i :3000 -t)

回答3:

lsof -wni tcp:3000

Then you should see the ruby process and you can run

kill -9 processid

you should be good to run the process now

rails s thin

running multiple processes doesn't seem like a good idea and from what i've read many people agree. I've noticed many memory leaks with rails unfortunately so I couldn't imagine having two processes running. I know with one overtime my page refreshes increasingly become slower because of the data being stored on memory.

回答4:

kill -9 $(lsof -i tcp:3000 -t)

回答5:

$ lsof -wni tcp:3000

# Kill the running process
$ kill -9 5946

$ rm tmp/server.pids

foreman start etc start the service

回答6:

You can get rid of the process by killing it:

kill -9 $(lsof -i tcp:3000 -t)

回答7:

It happens when you kill your server process and the pid file was not updated. The best solution is to delete the file Server.pid.

Use the command

rm <path to file Server.pid>

回答8:

gem install shutup

then go in the current folder of your rails project and run

shutup # this will kill the Rails process currently running

You can use the command 'shutup' every time you want

DICLAIMER: I am the creator of this gem

NOTE: if you are using rvm install the gem globally

rvm @global do gem install shutup

回答9:

Probably you suspended the server by: ^Z.

The four digital number that vim C:/Sites/folder/Pids/Server.pidsoutputs is the process id.

You should kill -9 processid, replacing the process id with the 4 numbers that vim (or other editor) outputed.

回答10:

If you are on Windows, you just need to do only one step as 'rails restart' and then again type 'rails s' You are good to go.

回答11:

On Windows Rails 5.2, delete this file

c:/Sites/<your_folder>/tmp/pids/server.pid

and run

rails s

again.

回答12:

Run: fuser -k -n tcp 3000

This will kill the process running at the default port 3000.

回答13:

I just had this issue and tried setting it to a different port, but the only thing I needed to do was to delete my [app_directory]/tmp/pids/server.pid and everything was good to go.