TCPServer Error: Address already in use - bind(2)

Question

Jekyll was working fine for me few weeks back but now all of a sudden it gives me the following error:

TCPServer Error: Address already in use - bind(2)
INFO         


        

Answer 1

Type this in your terminal to find out the PID of the process that's using the 3000 port:

$ lsof -wni tcp:3000

Then, use the number in the PID column to kill the process:

$ kill -9 PID

Answer 2

I was not qualified to post comment. So I added a new answer.

I encountered this problem on Mac OS X 10.10.3. And I had never installed/used Jekyll before. I was not able to start jekyll server with its default port number 4000. The reason was that the port was the same as what NoMachine used. With

$ sudo lsof -wni tcp:4000

Note: Running this command without sudo will have no output.

I saw this output:

COMMAND PID USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
nxd     449   nx    3u  IPv4 0x8d22************      0t0  TCP *:terabase (LISTEN)
nxd     449   nx    4u  IPv6 0x8d22************      0t0  TCP *:terabase (LISTEN)

The port 4000 was occupied by nxd, which was the process started by NoMachine. And

$ sudo kill -9 449

would not work, because NoMachine's nxd process would keep restarting, with a new PID.

Therefore, I had to either:

• Changed my jekyll server port in the site _config.yml to another spared one. I appended the line below to _config.yml and it worked.

  port: 3000 # change server port to 3000

or

• Changed NoMachine's default nxd port, or Uninstall NoMachine

Answer 3

Ctrl-Z doesn't terminate a program, but rather suspends it and sends it to the background. You can resume the program with the "fg" command. To actually terminate it, use Ctrl-C.

The actual error message seems to be bogus and can be ignored. I am getting the same error message "address in use" but jekyll works fine anyway at the expected port.

Answer 4

I have met this problem recently.

I tried out all the method mentioned above, and even restarted my computer, but still couldn't solve it!!! Then I removed the jekyll and installed a new version, it just worked.

gem uninstall jekyll & gem install jekyll (maybe you need super user priviledge).

If you really get annoyed with similar bugs, this sb method is worth a try...

Answer 5

work around

in /_site run: python -m SimpleHTTPServer 8080

Answer 6

First you need to find PID of the process that's using the 3000 port:

 $ps -ef

Output Like this:

1003      4953  2614  0 08:51 pts/0    00:00:00 -bash
1003      5634     1  0 08:56 pts/0    00:00:00 spring server | moviestore | started 2 hours ago                                           
1003      5637  5634  0 08:56 ?        00:00:01 spring app    | moviestore | started 2 hours ago | development mode                                                              
1003      6078  4953  0 09:03 pts/0    00:00:03 puma 3.6.0 (tcp://localhost:3000) [moviestore]              
1003      6117  2614  0 09:03 pts/1    00:00:00 -bash
root      6520     2  0 09:57 ?        00:00:00 [kworker/u8:2]
root      6936  1225  0 11:09 ?        00:00:00 [lightdm] <defunct>
1003      7084     1  0 11:09 ?        00:00:00 /usr/bin/python /usr/share/apport/apport-gtk
1003      7475     1  0 11:10 ?        00:00:00 /usr/bin/python /usr/share/apport/apport-gtk
root      8739  1225  1 11:29 tty8     00:00:11 /usr/bin/X :1 -auth /var/run/lightdm/root/:1 -nolisten tcp vt8 -novtswitch
root      8853  1225  0 11:29 ?        00:00:00 lightdm --session-child 13 22
1002      8943     1  0 11:30 ?        00:00:00 /usr/bin/gnome-keyring-daemon --daemonize --login
1002      8954  8853  0 11:30 ?        00:00:00 gnome-session --session=ubuntu
1002      8992  8954  0 11:30 ?        00:00:00 /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session gnome-session --session=ubuntu
1002      8995     1  0 11:30 ?        00:00:00 /usr/bin/dbus-launch --exit-with-session gnome-session --session=ubuntu
1002      8996     1  0 11:30 ?        00:00:00 //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
1002      9007  8954  0 11:30 ?        00:00:00 /usr/lib/gnome-settings-daemon/gnome-settings-daemon
1002      9015     1  0 11:30 ?        00:00:00 /usr/lib/gvfs/gvfsd
1002      9018  8954  1 11:30 ?        00:00:07 compiz
1002      9021     1  0 11:30 ?        00:00:00 /usr/lib/x86_64-linux-gnu/gconf/gconfd-2
1002      9028  8954  0 11:30 ?        00:00:00 /usr/lib/policykit-1-gnome/polkit-gnome-authentication-agent-1
1002      9029  8954  0 11:30 ?        00:00:01 nautilus -n
1002      9030  8954  0 11:30 ?        00:00:00 /usr/lib/gnome-settings-daemon/gnome-fallback-mount-helper
1002      9031  8954  0 11:30 ?        00:00:00 nm-applet
1002      9032  8954  0 11:30 ?        00:00:02 /opt/mTrac/mTrac
1002      9033  8954  0 11:30 ?        00:00:00 bluetooth-applet
1002      9045  9032  0 11:30 ?        00:00:00 /opt/mTrac/mTrac --type=zygote --no-sandbox
1002      9050     1  0 11:30 ?        00:00:00 /usr/lib/gvfs/gvfs-gdu-volume-monitor
1002      9054     1  0 11:30 ?        00:00:00 /usr/bin/pulseaudio --start --log-target=syslog
1002      9057     1  0 11:30 ?        00:00:00 /usr/lib/gvfs/gvfs-gphoto2-volume-monitor
1002      9062     1  0 11:30 ?        00:00:00 /usr/lib/gvfs/gvfs-afc-volume-monitor

here you can see :

1003      6078  4953  0 09:03 pts/0    00:00:03 puma 3.6.0 (tcp://localhost:3000) [moviestore]   

localhost:3000 have pid: 6078

kill that process by

$sudo kill 6078  

then run

$rails s